CN102611068A - Universal protector analog integrated circuit - Google Patents

Abstract

The analog integrated circuit of the universal protector of the present invention integrates overload, underload, phase failure, zero sequence, capacity or The common characteristics of current on-line detection, automatic reset and other circuits are unified and improved to form a common protection circuit unit. Multiple resistors, diodes, operational amplifier components and connections in the circuit are assembled together using microelectronics integration technology to produce highly integrated universal protection. In the device analog integrated circuit, several lead-out lines are used to lead out the circuit connections that need to be connected to the external circuit to the outside of the integrated circuit, and several electronic devices are compressed into a small integrated circuit, so that the printed circuit board area of the product is greatly reduced. Small, the protection accuracy is significantly improved, the structure and process of the protector shell are simplified, the cost of the whole machine is reduced, and it can be widely used in the fields of motors and power capacitors.

Description

Universal protector analog integrated circuit

technical field

The invention relates to a universal protector, a power capacitor protector, a motor protector, a pump protector, and a line protector, in particular to a universal protector analog integrated circuit, a power capacitor protection circuit, a motor protection circuit, and a pump protection circuit , line protection circuit, zero sequence protection circuit, automatic delay reset circuit and other fields.

Background technique

At present, there is no universal protector analog integrated circuit. Most of the analog circuits used for power capacitor protectors, motor protectors, pump protectors, air compressor protectors, and line protectors use several integrated operational amplifiers and several Diodes, triodes, resistors, capacitors and other discrete components are made on the circuit board by plug-in or patch technology. Due to the dense circuit, it is difficult to arrange the wires, and the shell structure is not easy to layout. In order to reduce the size of the shell and the circuit board , often adopt simplified circuits, so that the function and accuracy will be affected to a certain extent; at present, the analog circuits of conventional power capacitor protectors, motor protectors, pump protectors, and line protectors mostly use single-phase or three-phase bridge rectifiers The circuit deals with the rectification and synthesis of current signals. Due to the nonlinearity of rectifier diodes, the amplified current signal is severely distorted; the existing three-phase operational amplifier only outputs the highest phase current signal, which is not suitable for phase failure and three-phase unbalance protection. The existing phase failure and three-phase unbalance protection and overload protection do not consider the factors of rated current at the same time; the overall circuit does not have a unified current reference signal; the power capacitor protector cannot reflect the online power capacitor capacity; motor protectors, pump protectors It cannot reflect the online current value; the automatic reset is only partial, and the circuit is not perfect.

Contents of the invention

The purpose of the present invention is to provide a kind of universal protector analog integrated circuit for above-mentioned many defects, several resistors, diodes, operational amplifiers are designed in an integrated circuit, 100 components and parts become one component, can significantly reduce Small protector circuit board area and shell size; three-phase rectification and synthesis of four-output operational amplifier circuit uses three operational amplifiers to rectify and amplify the three-phase current signal respectively, and uses the other three operational amplifiers to form three follower outputs in parallel Connection synthesis avoids the nonlinear phenomenon caused by diodes, and realizes high-precision sampling amplification; three-phase rectification and synthesis of four-output operational amplifier circuit and the other three operational amplifiers form a phase-splitting memory externally controlled phase failure and three-phase current unbalance protection circuit , After the motor has a phase failure and three-phase unbalance, it needs the highest phase current to exceed the rated current to play a protective role, and the phase-separated fault memory indication, because the motor's operating current does not exceed the rated current and the phase failure and three-phase imbalance occur There is no harm to the motor, and it should not have a protective effect; the double-ratio dual-control self-opening overload protection circuit uses the operational amplifier I15 to amplify the current setting, and uses the operational amplifier I16 to perform the first comparative amplification control of the working current and the reference signal, and the control When the working current exceeds the specified value of the rated current, the inverse time protection circuit is automatically turned on, and the operational amplifier I18 is used to perform a second comparative amplification control on the overload current and the reference signal to control the output relay action protection; constant voltage and capacitance dual feedback thermal memory overload protection circuit The operational amplifier I15 is used to amplify the current setting, and the operational amplifier I13 is used for inverse time thermal memory overload protection processing. The constant voltage feedback makes the inverse time limit enter a stable working state, and the capacitance feedback makes the overload degree memorized in the capacitor. When the inverse time thermal memory overload protection After shutting down due to overload protection, the electric energy stored in the capacitor is discharged through the resistor until the stored energy is fully released before it can be started for the second time. This process is overload thermal memory and heat release, allowing the overloaded and heated motor to cool down again. Start; zero-maintain start time avoidance underload protection circuit uses the operational amplifier I13 to amplify the current setting, uses the operational amplifier I14 to compare and amplify the working current and the reference signal, controls the output relay action protection, and uses the operational amplifier I21 to start the time avoidance control The underload protection circuit performs start-up avoidance when the pump motor is started, and the underload protection does not work during the start-up avoidance process. The stop state keeps the circuit at zero maintenance to avoid misoperation; the zero-sequence leakage grounding protection circuit is adjusted and amplified by the operational amplifier I11, The zero-sequence signal uses the operational amplifier I12 to compare and amplify the zero-sequence signal and the reference signal, and controls the output relay action protection; the fully automatic delay dual-control reset circuit uses the operational amplifier I22 to perform the delayed dual-control reset, and any fault output can be The control starts to delay, and after the delay ends, the output terminal of the operational amplifier I22 controls the automatic reset of each fault circuit; the motor protection and the pump protection use the operational amplifier I11 to amplify and adjust the output value to be the same as the operating current for online detection of the working current; the power capacitor protection is online The detection capacity is amplified by the operational amplifier I11 to adjust the output value and power Capacitor capacity is the same; run-stop identification control circuit uses operational amplifier I19, open phase-separated memory, externally controlled phase failure and three-phase current unbalance protection circuit, zero-maintenance start-up avoidance under-load protection circuit and fully automatic time delay during operation Double-control reset circuit, it will be automatically closed when it stops; the operational amplifier I20 is used for the running flashing indicator circuit, when the working current is higher than a certain value, the running indicator light flashing frequency is proportional to the working current, and the running indicator is running when the machine is shut down or fails. The light also stops flickering; the whole circuit adopts a unified current reference signal, so that the circuit can achieve multi-purpose and multi-function.

The technical solution of the present invention is a universal protector analog integrated circuit, including a three-phase rectification and synthesis of four-output operational amplifier circuit, a phase-splitting memory externally controlled phase failure and three-phase current unbalance protection circuit, and a dual-ratio dual-control self-opening overload protection circuit. circuit, constant voltage and capacitance dual feedback thermal memory overload protection circuit, zero-maintenance start-up avoidance underload protection circuit, zero-sequence protection circuit, automatic delay dual-control reset circuit, power capacitor capacity or working current online detection circuit, running/ The stop recognition control circuit and the running flashing indication circuit are characterized by the universal protector analog integrated circuit, which unifies the common characteristics of the motor protection circuit, the pump protection circuit, the air compressor protection circuit, the power capacitor protection circuit and multiple protection circuits. Constitute a common protection circuit unit, unify the current reference signal, select the required unit circuit arbitrarily to form a protector with different functions, gather several resistors, several diodes and several hundred components of several operational amplifiers in the circuit together and use the microelectronics integration process to manufacture In the highly integrated universal protector analog integrated circuit, several lead wires are used to lead the wiring that needs to be connected to the external circuit to the outside of the integrated circuit to form a universal protector analog integrated circuit. The resistors R1 and R2 in the integrated circuit , the resistance value of resistor R3 is the same, the resistance value of resistor R4, resistor R5, and resistor R6 is the same, the resistance value of resistor R7, resistor R8, and resistor R9 is the same, the resistance value of resistor R10, resistor R11, and resistor R12 is the same, and the resistor R16, The resistance value of resistor R17 and resistor R18 is the same, the resistance value of resistor R14 and resistor R15 is the same, the resistance value of resistor R33 is greater than the resistance value of resistor R34, the resistance value of resistor R38 is greater than the resistance value of resistor R39, and the resistance value of resistor R41 is greater than The resistance value of resistor R42, the resistance value of resistor R42 is greater than the resistance value of resistor R43, and other resistance values are determined according to the common characteristics of multiple protection circuits. In the integrated circuit, the common terminal V0 is connected to the lead wire V3 and enters the integrated circuit. The circuit structure of the three-phase rectification and four-output operational amplifier circuit in the analog integrated circuit of the universal protector is that the three-phase current AC signal is amplified and rectified by three operational amplifiers and converted into DC signal, respectively output the three-phase current DC signal, and the output terminals of three operational amplifier followers are connected in parallel to synthesize and output the current signal of the highest phase of the three phases. The specific circuit is that the three-phase current signals are respectively sampled by the current transformer. The connection line L01 of L1 connects the resistor R46 and the lead-out line A1 to enter the integrated circuit, the connection line L02 of the current transformer L2 connects the resistor R47 and the lead-out line B1 to enter the integrated circuit, and the connection line L03 of the current transformer L3 connects the resistor R48 and the lead-out line C1 Entering the integrated circuit, the other end of the current transformer L1 and the other end of the resistor R46 are connected to the common terminal V0, the other end of the current transformer L2 and the other end of the resistor R47 are connected to the common terminal V0, the other end of the current transformer L3 is connected to the resistor R48 The other end of the connection is connected to the common terminal V0, and the lead line A1 Connect the positive input terminal of the operational amplifier I1, the lead-out line B1 is connected to the positive input terminal of the operational amplifier I2, the lead-out line C1 is connected to the positive input terminal of the operational amplifier I3, the negative input terminal of the operational amplifier I1 is connected to the resistor R1 and the resistor R4, and the operational amplifier I2 The negative input terminal of the operational amplifier I3 is connected to the resistor R2 and the resistor R5, the negative input terminal of the operational amplifier I3 is connected to the resistor R3 and the resistor R6, the other end of the resistor R1, the resistor R2 and the resistor R3 are connected to the common terminal V0, and the output terminal of the operational amplifier I1 is connected to the diode D1 The positive pole of the diode D2 is connected to the output terminal of the operational amplifier I2, the positive pole of the diode D3 is connected to the output terminal of the operational amplifier I3, the other end of the resistor R4 is connected to the negative pole of the diode D1, the resistor R7 and the resistor R10 and the lead wire A2 and the operational amplifier The positive input terminal of I4, the other end of the resistor R5 is connected to the negative pole of the diode D2 and the resistor R8 and the resistor R11 and the lead wire B2 and the positive input terminal of the operational amplifier I5, and the other end of the resistor R6 is connected to the negative pole of the diode D3 and the resistor R9 and the resistor R12 and the lead wire C2 and the positive input terminal of the operational amplifier I6, the other end of the resistor R7, the resistor R8 and the resistor R9 are connected to the common terminal V0, the output terminal of the operational amplifier I4 is connected to the positive pole of the diode D4, and the output terminal of the operational amplifier I5 is connected to the diode The positive pole of D5, the positive pole of the output terminal of operational amplifier I6 connects the positive pole of diode D6, the negative pole of operational amplifier I4 and the negative pole of operational amplifier I5 and the negative pole of operational amplifier I6 and the negative pole of diode D4 and the negative pole of diode D5 and The cathode of the diode D6 is connected with the resistor R13 and the resistor R15 and the lead wire S1, the other end of the resistor R15 is connected with the resistor R14 and the negative input terminal of the operational amplifier I7, the positive input terminal of the operational amplifier I7 is connected with the common terminal V0, the other end of the resistor R14 One end is connected to the output terminal of the operational amplifier I7 and the lead-out line S2, the lead-out line A1 is the input terminal of the A-phase current signal, the lead-out line B1 is the input terminal of the B-phase current signal, the lead-out line C1 is the input terminal of the C-phase current signal, and the lead-out line A2 is A-phase current signal rectification and amplification output terminal, lead-out line B2 is B-phase current signal rectification and amplification output terminal, lead-out line C2 is C-phase current signal rectification and amplification output terminal, lead-out line A2 is connected to the positive pole of electrolytic capacitor C01 outside the integrated circuit, lead-out line B2 is connected to the positive pole of the electrolytic capacitor C02 outside the integrated circuit, and the lead line C2 is connected to the positive pole of the electrolytic capacitor C03 outside the integrated circuit. The negative pole of the electrolytic capacitor C01, the negative pole of the electrolytic capacitor C02 and the negative pole of the electrolytic capacitor C03 are connected to the common terminal V0, and the lead line S1 is the highest composite output. The positive signal output terminal of the phase working current, and the lead line S2 is the negative signal output terminal of the highest phase working current for composite output, which is used for external connection of the integrated circuit to other protection functions. The external current transformer L1, current transformer L2, and current transformer L3 of the integrated circuit The performance is the same, the resistance values of resistor R46, resistor R47, and resistor R48 are the same, and the capacities of electrolytic capacitor C01, electrolytic capacitor C02, and electrolytic capacitor C03 same.

The said universal protector analog integrated circuit is characterized in that in the universal protector analog integrated circuit, the phase-splitting memory externally controlled phase failure and three-phase current unbalance protection circuit is composed of three operational amplifiers respectively forming a three-phase three-comparison circuit. Circuit, the three-phase current signal is compared with the comparison signal to determine the fault protection. The comparison signal is formed by the current signal division of the highest phase of the three-phase output in the three-phase rectification synthesis four-output operational amplifier circuit. The comparison signal is externally controlled by the rated current , the specific circuit is that one end of the resistor R13 is connected to the lead wire S1, the other end of the resistor R13 is connected to the negative input terminal of the operational amplifier I8, the negative input terminal of the operational amplifier I9, the negative input terminal of the operational amplifier I10 and the lead wire E4, and one end of the resistor R10 Connect the lead wire A2, the other end of the resistor R10 is connected to the positive input terminal of the operational amplifier I8, the negative pole of the diode D22 and the resistor R16, the other end of the resistor R16 is connected to the positive pole of the diode D16, and the negative pole of the diode D16 is connected to the output terminal of the operational amplifier I8 and the negative pole of the diode D10 And the cathode of diode D29, the anode of diode D10 is connected to lead-out line A3, one end of resistor R11 is connected to lead-out line B2, the other end of resistor R11 is connected to the positive input terminal of operational amplifier I9, the cathode of diode D23 and resistor R17, and the other end of resistor R17 is connected to diode The positive pole of D17 and the negative pole of diode D17 are connected to the output terminal of the operational amplifier I9, the negative pole of the diode D11 and the negative pole of the diode D30, the positive pole of the diode D11 is connected to the lead-out line B3, one end of the resistor R12 is connected to the lead-out line C2, and the other end of the resistor R12 is connected to the terminal of the operational amplifier I10 The positive input terminal and the negative pole of diode D24 and resistor R18, the other end of resistor R18 is connected to the positive pole of diode D18, the negative pole of diode D18 is connected to the output terminal of operational amplifier I10, the negative pole of diode D12 and the negative pole of diode D31, the positive pole of diode D12 is connected to lead-out line C3, lead-out line E4 is the connection point of phase failure and three-phase current imbalance protection comparison signal. The lead wire E4 is connected to resistor R49 to obtain the phase failure and three-phase current imbalance protection comparison signal. The other end of resistor R49 is connected to the common terminal V0, and the lead wire E4 passes through When the diode D51 and the resistor R55 are connected to the lead line K2, the phase failure and three-phase current unbalance protection are controlled and play a protective role when the working current is greater than the specified value of the rated current. The lead line A3 is the output control when the A phase current is broken or unbalanced. terminal, the lead-out line B3 is the output control terminal when the B-phase current is open or unbalanced, the lead-out line C3 is the output control terminal when the C-phase current is open-phase or unbalanced, the lead-out line A3 is connected to the negative pole of the light-emitting diode D41, and the lead-out line B3 is connected to the light-emitting diode The cathode of diode D42, the lead wire C3 is connected to the cathode of light-emitting diode D43, the anode of light-emitting diode D41 and the anode of light-emitting diode D42 and the anode of light-emitting diode D43 are connected together to resistor R69 and the cathode of Zener diode D59, and the anode of Zener diode D59 is connected to resistor R70 and the triode The base of BG, the other end of the resistor R69 is connected to the positive power supply VDD and the cathode of the diode D55 and the relay J, and then The other end of the electrical appliance J is connected to the anode of the diode D55 and the collector of the triode BG, and the other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG.

The so-called universal protector analog integrated circuit is characterized in that the dual-ratio dual-control self-opening overload protection circuit in the universal protector analog integrated circuit automatically turns on the inverse time-limit protection circuit when the working current exceeds the specified value of the rated current, and the combined output is the highest. The negative signal of the phase working current is connected to the resistor R51 of the external overload protection setting circuit of the integrated circuit through the lead-out line S2, and the other end of the resistor R51 is connected to the fixed end of the potentiometer W1, the sliding end and the lead-out line G2, and the other fixed end of the potentiometer W1 is connected to the lead-out line G1 , the lead line G2 is connected to the negative input terminal of the operational amplifier I15, the positive input terminal of the operational amplifier I15 is connected to the common terminal V0, the lead line G1 is connected to the output terminal of the operational amplifier I15, resistor R25, resistor R32 and resistor R0, and the other end of the resistor R25 Connect the positive input terminal of the operational amplifier I16 to the resistor R26, the resistor R27 and the lead wire G4, the other end of the resistor R26 is connected to the common terminal V0, the negative input terminal of the operational amplifier I16 is connected to the resistor R33 and the lead wire E1, and the output terminal of the operational amplifier I16 Connect the cathode of the diode D33 and the lead wire K2, the other end of the resistor R27 is connected to the anode of the diode D34, the cathode of the diode D34 is connected to the anode of the diode D35, the cathode of the diode D35 is connected to the anode of the diode D36 and the cathode of the diode D37, and the resistor R28 and the resistor R29 and the negative input terminal of the operational amplifier I17 and the lead wire G3, the other end of the resistor R28 is connected to the positive pole of the diode D33, the positive input terminal of the operational amplifier I17 is connected to the common terminal V0, the negative pole of the diode D36 is connected to the positive power supply VDD, and the positive pole of the operational amplifier I17 The output end is connected to the anode of the diode D37, the other end of the resistor R29 is connected to the lead wire G5, the lead wire G5 is connected to the lead wire G6 outside the integrated circuit, the lead wire G6 is connected to the resistor R30 inside the integrated circuit, and the other end of the resistor R30 is connected to the operational amplifier I18 The negative input terminal of the operational amplifier I18 is connected to the negative pole of the resistor R31, the negative pole of the diode D19 and the lead wire E2, the other end of the resistor R31 is connected to the positive pole of the diode D13, and the output terminal of the operational amplifier I18 is connected to the negative pole of the diode D13 and the terminal of the diode D26 Negative pole and negative pole of diode D7, the positive pole of diode D7 is connected to the lead wire G7, which is the output control terminal when the current is overloaded, the lead wire G7 is connected to the negative pole of the light-emitting diode D45, and the positive pole of the light-emitting diode D45 is connected to the negative pole of the resistor R69 and the Zener diode D59 , the anode of the Zener diode D59 is connected to the resistor R70 and the base of the triode BG, the other end of the resistor R69 is connected to the positive power supply VDD and the cathode of the diode D55 and the relay J, and the other end of the relay J is connected to the anode of the diode D55 and the collector of the triode BG, The other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG. The lead wire E2 is the reference signal for current overload protection. The lead wire E2 is connected to the lead wire E1 and the cathode of the Zener diode D61 of the base signal source and the resistor R56 through the resistor R66. , the other end of resistor R56 is connected to the positive power supply V DD, the anode of the Zener diode D57 is connected to the common terminal V0.

The so-called universal protector analog integrated circuit is characterized in that the constant voltage and capacitance double feedback thermal memory overload protection circuit in the universal protector analog integrated circuit synthesizes and outputs the highest phase operating current negative signal through the lead-out line S2 to connect to the outside of the integrated circuit The resistor R51 of the overload protection setting circuit, the other end of the resistor R51 is connected to the fixed end of the potentiometer W1, the sliding end and the lead wire G2, the other fixed end of the potentiometer W1 is connected to the resistor R55 and the lead wire G1, and the lead wire G1 is connected to the output of the operational amplifier I15 terminal, the lead line G2 is connected to the negative input terminal of the operational amplifier I15, the positive input terminal of the operational amplifier I15 is connected to the common terminal V0, the other end of the external resistor R55 is connected to the resistor R54 and the lead wire Q3, the other end of the resistor R54 is connected to the common terminal V0, and the The line Q3 is connected to the positive input terminal of the operational amplifier I13, the negative input terminal of the operational amplifier I13 is connected to the lead line Q2, the output terminal of the operational amplifier I13 is connected to the lead line Q1, the lead line Q1 is connected to the external resistor R60 and the resistor R61, and the other end of the resistor R61 Connect resistor R62 to the negative pole of Zener diode D60, the other end of resistor R62 is connected to resistor R63, resistor R64 and the negative pole of diode D57, the other end of resistor R64 is connected to the positive pole of Zener diode D60 and common terminal V0, the other end of resistor R63 Connect the positive pole of the diode D57 and the negative pole of the electrolytic capacitor C09 to the lead wire Q2 with the resistor R65, the other end of the resistor R65 is connected to the common terminal V0, the other end of the resistor R60 is connected to the positive pole of the diode D50, and the negative pole of the diode D50 is connected to the positive pole of the electrolytic capacitor C09 and Resistor R59 is then connected to the lead wire G6, the other end of the resistor R59 is connected to the common terminal V0, the lead wire G6 is connected to the internal resistor R30, the other end of the resistor R30 is connected to the negative input terminal of the operational amplifier I18, and the positive input terminal of the operational amplifier I18 is connected to the resistor R31 and The lead wire E2, the other end of the resistor R31 is connected to the anode of the diode D13, the output terminal of the operational amplifier I18 is connected to the cathode of the diode D13 and the cathode of the diode D7, the anode of the diode D7 is connected to the lead wire G7, and the lead wire E2 is connected to the external resistor R68 and the resistor R74 , the other end of the resistor R68 is connected to the common terminal V0, the other end of the resistor R74 is connected to the positive power supply VDD, the lead wire G7 is connected to the negative pole of the light-emitting diode D45, the positive pole of the light-emitting diode D45 is connected to the resistor R69 and the negative pole of the Zener diode D59, and the voltage regulator diode D59 The positive pole is connected to the base of the resistor R70 and the transistor BG, the other end of the resistor R69 is connected to the positive power supply VDD, the negative pole of the diode D55 and the relay J, the other end of the relay J is connected to the positive pole of the diode D55 and the collector of the triode BG, and the other end of the resistor R70 is connected to The negative power supply VCC and the emitter of the transistor BG.

The said universal protector analog integrated circuit is characterized in that in the universal protector analog integrated circuit, the zero-maintenance start-up avoidance underload protection circuit structure is composed of an operational amplifier and an external potentiometer of the integrated circuit to form an underload setting circuit. Use the operational amplifier I13 to amplify the current setting, use the operational amplifier I14 to compare and amplify the working current and the reference signal, use the operational amplifier I21 to start the time-avoidance control, the under-load protection does not work during the start-up time-avoidance process, and the circuit in the stop state Maintain at zero to avoid misoperation, synthesize and output the negative signal of the highest phase operating current through the lead-out line S2 to connect the resistor R52 of the external underload protection setting circuit of the integrated circuit, and the other end of the resistor R52 is connected to the fixed end and sliding end of the potentiometer W2 and the lead-out line Q2 , the other end of the potentiometer W2 is connected to the lead-out line Q1, the lead-out line Q2 is connected to the negative input terminal of the operational amplifier I13, the positive input end of the operational amplifier I13 is connected to the lead-out line Q3, and the lead-out line Q3 is connected to the resistor R54 outside the integrated circuit, and the resistor R54 The other end of the resistor R21 is connected to the common terminal V0, the lead line Q1 is connected to the output terminal of the operational amplifier I13 and the resistor R21, the other end of the resistor R21 is connected to the positive input terminal of the operational amplifier I14, the resistor R23 and the negative pole of the diode D20, and the other end of the resistor R23 is connected to The positive pole of the diode D14, the negative input terminal of the operational amplifier I14 are connected to the negative pole of the diode D25, the positive pole of the diode D32 and the lead wire E3, the positive pole of the diode D25 is connected to the common terminal V0, the negative pole of the diode D32 is connected to the resistor R24, and the other end of the resistor R24 is connected to The output terminal of the operational amplifier I21 of the start-up time-avoidance circuit and the lead-out line Y2, the negative pole of the diode D14 are connected to the output terminal of the operational amplifier I14, the negative pole of the diode D27 and the negative pole of the diode D8, the positive pole of the diode D8 is connected to the lead-out line Q4, and the lead-out line E3 It is the reference signal for current underload protection. The lead wire E3 is connected to the external resistor R67 and resistor R72 of the integrated circuit. The other end of the resistor R67 is connected to the negative pole of the voltage regulator tube D61 of the reference circuit and the resistor R56. The other end of the resistor R56 is connected to the positive power supply VDD. The positive pole of the pressure tube D61 is connected to the common terminal V0, the other end of the resistor R72 is connected to the positive pole of the diode D53 and the positive pole of the electrolytic capacitor C10, the negative pole of the electrolytic capacitor C10 is connected to the negative power supply VCC, and the negative pole of the diode D53 is connected to the positive pole of the electrolytic capacitor C07 and the lead wire K1. The negative pole of the capacitor C07 is connected to the fixed terminal and sliding terminal of the potentiometer W4 and the lead-out line Y1, the other fixed end of the potentiometer W4 is connected to the negative power supply VCC, the lead-out line Y1 is connected to the negative input terminal of the operational amplifier I21, and the positive input terminal of the operational amplifier I21 is connected to the resistor R38 and resistor R39, the other end of the resistor R38 is connected to the positive power supply VDD, the other end of the resistor R39 is connected to the negative power supply VCC, the lead-out line Q4 is connected to the negative pole of the light-emitting diode D46, the positive pole of the light-emitting diode D46 is connected to the negative pole of the resistor R69 and the Zener diode D59, The anode of the Zener diode D59 is connected to the base of the resistor R70 and the triode BG, and the other of the resistor R69 The other end of the relay J is connected to the positive electrode of the diode D55 and the collector of the triode BG, and the other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG.

The so-called universal protector analog integrated circuit is characterized in that the zero-sequence protection circuit in the universal protector analog integrated circuit, one end of the zero-sequence current transformer L0 is connected to the resistor R58, and the other end of the zero-sequence current transformer L0 is connected to the common terminal V0 , the other end of the resistor R58 is connected to the resistor R76 and the lead wire H2, the other end of the resistor R76 is connected to the lead wire H1, the lead wire H2 is connected to the negative input end of the operational amplifier I11, the positive input end of the operational amplifier I11 is connected to the common terminal V0, and the operational amplifier The output terminal of I11 is connected to the anode of diode D0, the lead wire H1 is connected to the cathode of diode D0 and resistor R22, the other end of resistor R22 is connected to the negative input terminal of operational amplifier I12, and the positive input terminal of operational amplifier I12 is connected to the negative terminal of diode D21 and resistor R19 and Resistor R20, the other end of resistor R19 is connected to negative power supply VCC, the other end of resistor R20 is connected to the negative pole of diode D15, the output end of operational amplifier I12 is connected to the positive pole of diode D15, the negative pole of diode D28 and the negative pole of D9, and the positive pole of D9 is connected to the Line H3, lead-out line H3 is connected to the negative pole of the light-emitting diode D47, the positive pole of the light-emitting diode D47 is connected to the negative pole of the resistor R69 and the Zener diode D59, the positive pole of the Zener diode D59 is connected to the resistor R70 and the base of the triode BG, and the other end of the resistor R69 Connect the positive power supply VDD and the cathode of the diode D55 to the relay J, the other end of the relay J is connected to the anode of the diode D55 and the collector of the triode BG, and the other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG.

The said universal protector analog integrated circuit is characterized in that in the universal protector analog integrated circuit, a dual-control fully automatic delay multi-channel reset circuit, each protection output terminal is connected to form an OR gate circuit to control the reset delay circuit, The output terminals of the reset delay circuit are simultaneously connected to control the reset of each protection output terminal, the negative pole of the diode D26 is connected to the output terminal of the operational amplifier I18, the negative pole of the diode D27 is connected to the output terminal of the operational amplifier I14, and the negative pole of the diode D28 is connected to the output of the operational amplifier I12 terminal, the cathode of the diode D29 is connected to the output terminal of the operational amplifier I8, the negative pole of the diode D30 is connected to the output terminal of the operational amplifier I9, the cathode of the diode D31 is connected to the output terminal of the operational amplifier I10, the positive pole of the diode D26 and the positive pole of the diode D27 and the diode D28 The positive pole of the diode D29 and the positive pole of the diode D30 and the positive pole of the diode D31 are connected to the resistor R41 and the resistor R43 together, and the other end of the resistor R43 is connected to the positive input terminal of the operational amplifier I22 and the positive pole of the diode D40 and the resistor R42, the diode D40 The negative pole is connected to the resistor R44 and the resistor R45, the other end of the resistor R45 is connected to the common terminal V0, the other end of the resistor R42 and the resistor R44 is connected to the positive power supply VDD, the other end of the resistor R41 is connected to the negative input terminal of the operational amplifier I22 and the lead wire Z, the diode The negative pole of D19 is connected to the positive input terminal of operational amplifier I18, the negative pole of diode D20 is connected to the positive input terminal of operational amplifier I14, the negative pole of diode D21 is connected to the positive input terminal of operational amplifier I12, and the negative pole of diode D22 is connected to the positive input terminal of operational amplifier I8 , the cathode of the diode D23 is connected to the positive input of the operational amplifier I9, the cathode of the diode D24 is connected to the positive input of the operational amplifier I10, the anode of the diode D19 and the anode of the diode D20 and the anode of the diode D21 and the anode of the diode D22 and the anode of the diode D23 The anode and the anode of the diode D24 are connected together to the resistor R40 and the lead wire F, the output terminal of the operational amplifier I22 and the resistor R40, the lead wire F is connected to the reset button FW and the cathode of the diode D49 outside the integrated circuit, and the other end of the reset button FW Connect the positive pole of the electrolytic capacitor C04 and the positive power supply VDD, the positive pole of the diode D49 connects the negative pole of the electrolytic capacitor C04 and the resistor R50, the other end of the resistor R50 is connected to the negative power supply VCC, and the lead Z connects the negative pole of the electrolytic capacitor C06 and the diode D52 outside the integrated circuit The negative pole of the electrolytic capacitor C06 is connected to the positive power supply VDD, the positive pole of the diode D52 is connected to the lead line K1, and the lead line F is the main connection line for external power-on reset, manual reset and internal automatic reset.

The said universal protector analog integrated circuit is characterized in that the operating flashing indicator circuit in the universal protector analog integrated circuit, when the operating current is higher than a certain value, the operating indicator flashing frequency is proportional to the operating current, shutdown or When the machine is shut down due to failure, the running indicator light also stops flashing. The positive input terminal of the operational amplifier I20 is connected to the resistor R35 and the resistor R36. The other end of the resistor R35 is connected to the positive pole of the diode D38 and the common terminal V0, and the negative input terminal of the operational amplifier I20 is connected to the negative pole of the diode D38. And the anode of diode D39, resistor R0 and lead-out line X1, the negative pole of diode D39 is connected to resistor R37, the other end of resistor R37 and the other end of resistor R36 are connected to the output terminal of operational amplifier I20 and lead-out line X2, and lead-out line X2 is connected to integrated circuit The external resistor R57, the other end of the resistor R57 is connected to the anode of the light-emitting diode D48, the cathode of the light-emitting diode D48 is connected to the common terminal V0, and the lead line X1 is connected to the anode of the diode D54 outside the integrated circuit and the positive electrode of the electrolytic capacitor C08, and the negative electrode of the electrolytic capacitor C08 Connect the common terminal V0, the negative pole of the diode D54 is connected to the positive pole of the LED D41 and the positive pole of the LED D42 and the positive pole of the LED D43 and the positive pole of the LED D45 and the positive pole of the LED D46 and the positive pole of the LED D47 and the Zener diode D59 The negative pole of the diode D59 is connected to the negative pole of the resistor R69, the positive pole of the Zener diode D59 is connected to the base pole of the resistor R70 and the transistor BG, the other end of the resistor R69 is connected to the positive power supply VDD and the negative pole of the diode D55 and the relay J, and the other end of the relay J is connected to the positive pole of the diode D55 and the transistor The collector of BG and the other end of the resistor R70 are connected to the negative power supply VCC and the emitter of the triode BG.

The said universal protector analog integrated circuit is characterized in that the online detection power capacitor capacity or the operating current online detection circuit in the universal protector analog integrated circuit, the negative signal of the operating current is connected to the external circuit resistor R53 of the integrated circuit through the lead-out line S2, The other end of the resistor R53 is connected to the potentiometer W3 and the lead wire H2, the other end of the potentiometer W3 is connected to the external digital display terminal CS and the lead wire H1 to enter the integrated circuit, the lead wire H2 is connected to the negative input terminal of the operational amplifier I11, and the operational amplifier I11 The positive input terminal is connected to the common terminal V0, the output terminal of the operational amplifier I11 is connected to the positive pole of the diode D0, and the lead wire H1 is connected to the negative pole of the diode D0 and the resistor R22. The output terminal is connected to the external digital display terminal CS.

The said universal protector analog integrated circuit is characterized in that the run/stop identification control circuit in the universal protector analog integrated circuit, the positive input terminal of the operational amplifier I19 is connected to the resistor R32, and the other end of the resistor R32 is connected to the resistor R0 and the operational amplifier The output terminal of I15 and the lead wire G1, the negative input terminal of the operational amplifier I19 are connected to the resistor R33 and the resistor R34, the other end of the resistor R33 is connected to the negative input terminal of the operational amplifier I16 and the lead wire E1, the other end of the resistor R34 is connected to the common terminal V0, the operational amplifier The output terminal of I19 is connected to lead-out line K1. For pump protection, lead-out line K1 is connected to the anode of electrolytic capacitor C07 and the cathode of diode D53 outside the integrated circuit. For power capacitor protection, lead-out line K1 is connected to the cathode of diode D56 and diode D52 outside the integrated circuit. positive pole.

The present invention provides a universal protector analog integrated circuit for power capacitor protectors, motor protectors, pump protectors, and line protectors. Several resistors, diodes, and operational amplifiers are designed in one integrated circuit, and 100 The components become one component, which can significantly reduce the circuit board area and shell size of the protector; the three-phase rectification and synthesis of four-output operational amplifier circuit avoids the nonlinear phenomenon caused by diodes, and realizes high-precision sampling amplification; phase-separated memory external control The phase failure and three-phase current unbalance protection circuit realizes the protection function only when the highest phase current of the motor exceeds the rated current, and the phase-separated fault memory indication makes the protection more reasonable; the dual-ratio dual-control self-opening overload protection circuit controls the work When the current exceeds the specified value of the rated current, the inverse time protection circuit is automatically turned on; the constant voltage and capacitance dual feedback thermal memory overload protection circuit performs inverse time thermal memory overload protection processing, allowing the overloaded and heating motor to cool down before starting; zero-maintenance start to avoid undertime The start-time avoidance control of the load protection circuit The under-load protection circuit performs start-time avoidance when the pump motor starts, and the stop state keeps the circuit at zero maintenance to avoid misoperation; the fully automatic delay double-control reset circuit performs delay double-control reset, any The fault output can control the start delay, and after the delay is over, it can control the automatic reset of each fault circuit; the motor protection and pump protection can detect the working current online; the power capacitor protection can detect the capacity online; the running flashing indicator circuit makes the running indicator flashing frequency It is proportional to the working current, and the running indicator light stops flashing when the machine is shut down or fails; the whole circuit adopts a unified current reference signal, which makes the circuit multi-purpose and multi-functional.

Description of drawings

Figure 1 Schematic diagram of the internal circuit of the analog integrated circuit of the universal protector

Figure 2. Circuit schematic diagram of three-phase rectification and synthesis of four output operational amplifiers

Fig. 3 Schematic diagram of phase-splitting memory external control phase failure and three-phase current unbalance protection circuit

Figure 4 Schematic diagram of dual-ratio dual-control self-opening overload protection circuit

Figure 5 Schematic diagram of constant voltage and capacitor dual feedback thermal memory overload protection circuit

Figure 6. Schematic diagram of underload protection circuit for zero-maintenance start-up avoidance

Figure 7 Schematic diagram of zero-sequence protection circuit

Figure 8. Schematic diagram of fully automatic delay dual-control reset circuit and running flashing indication circuit

Figure 9 Schematic diagram of pump protection circuit

Figure 10 Schematic diagram of power capacitor protection circuit

Inside the analog integrated circuit of the universal protector in the figure: R0-R45 resistors, D0-D40 diodes, I1-I22 operational amplifiers, VDD positive power supply, VCC negative power supply, V0 common terminal, A1-A3 lead-out lines, B1-B3 lead-out lines , C1-C3 lead-out line, E1-E4 lead-out line, F lead-out line, G1-G7 lead-out line, H1-H3 lead-out line, K1-K2 lead-out line, Q1-Q4 lead-out line, S1-S2 lead-out line, V1 lead-out line , V2 lead-out line, V3 lead-out line, X1-X2 lead-out line, Y1-Y2 lead-out line, Z lead-out line;

In the figure, the outside of the universal protector analog integrated circuit: R46-R76 resistors, W1-W4 potentiometers, D41-D48 light-emitting diodes, D49-D58 diodes, D59-D61 voltage regulator diodes, BG transistors, VDD positive power supply, VCC negative power supply , V0 public terminal, C01-C11 electrolytic electric passenger, J relay, L1-L3 current transformer, L01-L03 current transformer terminal, L0 zero sequence current transformer, FW reset button, CS external digital display terminal.

specific implementation plan

Figure 1 is a schematic diagram of the internal circuit of the analog integrated circuit of the universal protector. The analog integrated circuit of the universal protector is the common characteristic of the motor protection circuit, the pump protection circuit, the air compressor protection circuit, the power capacitor protection circuit and multiple protection circuits. Unify the shared protection circuit unit, unify the current reference signal, choose the required unit circuit arbitrarily to form a protector with different functions, gather several resistors, several diodes and several operational amplifiers in the circuit together and adopt the microelectronics integration process Made in the highly integrated universal protector analog integrated circuit, the microelectronic integrated circuit manufacturer is entrusted to make the integrated circuit according to the requirements of the circuit of the present invention. The operational amplifier in the circuit refers to the performance of the 324 operational amplifier. R2, resistor R3 have the same resistance value, resistor R4, resistor R5, and resistor R6 have the same resistance value, resistor R7, resistor R8, and resistor R9 have the same resistance value, resistor R10, resistor R11, and resistor R12 have the same resistance value, and resistor R16 has the same resistance value. , the resistance value of resistor R17 and resistor R18 are the same, the resistance value of resistor R14 and resistor R15 are the same, the resistance value of resistor R33 is greater than the resistance value of resistor R34, the resistance value of resistor R38 is greater than the resistance value of resistor R39, and the resistance value of resistor R41 Greater than the resistance value of resistor R42, the resistance value of resistor R42 is greater than the resistance value of resistor R43, and other resistance values are determined according to the common characteristics of multiple protection circuits. Lead out to the outside of the integrated circuit to form a universal protector analog integrated circuit. The positive power supply VDD is connected to the lead line V1 to enter the integrated circuit, the negative power supply VCC is connected to the lead line V2 to enter the integrated circuit, and the common terminal V0 is connected to the lead line V3 to enter the integrated circuit.

Figure 2 is a circuit schematic diagram of three-phase rectification and synthesis of four output operational amplifiers. The working principle is that the three-phase current signals are respectively sampled by the same three current transformers as current transformer L1, current transformer L2, and current transformer L3 through the lead-out line A1 , lead-out line B1, and lead-out line C1 enter the integrated circuit, and are amplified and rectified by the operational amplifier I1, operational amplifier I2, and operational amplifier I3 to convert it into a DC signal, and then output three-phase current through the lead-out line A2, lead-out line B2, and lead-out line C2 respectively DC signal, three electrolytic capacitors with the same electrolytic capacitor C01, electrolytic capacitor C02, and electrolytic capacitor C03 are respectively connected outside the integrated circuit for filtering, and three follower amplifier output terminals composed of operational amplifier I4, operational amplifier I5, and operational amplifier I6 Connected in parallel to synthesize and output the positive signal of the highest phase working current through the lead line S1, and then output the negative signal of the highest phase working current through the operational amplifier I7 inverting through the lead line S2 for the external connection of the integrated circuit to other protection functions. The specific implementation scheme is to carry out according to the circuit connection in Fig. 2, the performance of current transformer L1, current transformer L2, current transformer L3 outside the integrated circuit is the same, the resistance value of resistance R46, resistance R47, resistance R48 is identical, electrolytic capacitor C01, The electrolytic capacitor C02 and the electrolytic capacitor C03 have the same capacity.

Figure 3 is a schematic diagram of the phase-splitting memory externally controlled phase failure and three-phase current unbalance protection circuit. The working principle is a three-phase three-comparison circuit composed of three operational amplifiers I8, operational amplifier I9 and operational amplifier I10 respectively, and the lead wire A2 The three-phase current DC signals of lead-out line B2 and lead-out line C2 are respectively compared with the comparison signal to determine the fault protection. The comparison signal is formed by the positive signal of the highest phase working current of the lead-out line S1 through resistor R13 and resistor R49. The comparison signal is subject to the rated External current control, when there is a phase failure or three-phase current imbalance during operation, the lead-out line A3 or lead-out line B3 or lead-out line C3 controls the light-emitting diode D41 or light-emitting diode D42 or light-emitting diode D43 to light up to achieve phase-separated memory, and then controls the relay J The specific implementation plan is to connect the circuit in Figure 3. The lead-out line E4 is the connection point of the comparison signal for phase failure and three-phase current unbalance protection. The lead-out line A3 is the output control terminal for phase A current failure or unbalance. , the lead-out line B3 is the B-phase current open-phase or unbalanced output control terminal, the lead-out line C3 is the C-phase current open-phase or unbalanced output control terminal, and the lead-out line K2 is the rated current output control terminal.

Figure 4 is a schematic diagram of the dual-ratio dual-control self-opening overload protection circuit. The working principle is that the negative signal of the highest phase operating current output by the lead wire S2 passes through the rated current setting amplifier circuit composed of the potentiometer W1, the resistor R51 and the operational amplifier I15. After setting and amplifying, compare it with the current reference signal of the lead wire E1 through the operational amplifier I16 for the first time. When the operating current exceeds the specified value of the rated current, the output of the operational amplifier I16 controls the inverse time protection circuit to automatically open, and the operational amplifier I15 outputs The working current signal of the electrolytic capacitor C05 is inversely charged through the resistor R27, the diode D34 and the diode D35, and the voltage signal on the electrolytic capacitor C05 is compared with the current reference signal of the lead wire E1 and the lead wire E2 through the operational amplifier I18 for the second time , when the operating current exceeds the specified value of the rated current and after an inverse time delay, the output of the operational amplifier I18 controls the light-emitting diode D45 to light up through the lead-out line G7, and the relay J is disconnected to stop. The base Huai signal is composed of Zener diode D61 and resistor R56.

Figure 5 is a schematic diagram of the constant voltage and capacitor double feedback thermal memory overload protection circuit. The working principle is that the negative signal of the highest phase operating current output by the lead wire S2 is amplified by the rated current setting composed of the potentiometer W1, the resistor R51 and the operational amplifier I15. The circuit enters the constant voltage and capacitance double feedback composed of resistor R59, resistor R60, resistor R61, resistor R62, resistor R63, resistor R64, resistor R65, diode D50, diode D57, voltage regulator diode D60, electrolytic capacitor C09 and operational amplifier I13 Thermal memory overload protection circuit, the first constant voltage feedback is when the operating current does not exceed the specified value of the rated current, the feedback signal is regulated by the Zener diode D60 to make the circuit reach a balanced state, the second capacitance feedback is when the operating current exceeds the rated current When the specified value is reached, the circuit loses balance, the charging current to the electrolytic capacitor C09 is increased, and the feedback through the electrolytic capacitor C09 is also increased until the positive electrode potential of the electrolytic capacitor C09 is higher than the comparison signal, the comparator composed of the operational amplifier I18 is reversed, and the light-emitting diode D45 When it lights up, the relay J is disconnected and shuts down. The specific implementation plan is to connect the circuit in Fig. 5, and the comparison signal is composed of the voltage division of the resistor R79 and the resistor R68.

Figure 6 is a schematic diagram of the underload protection circuit for zero-maintenance starting. This circuit is mainly used for no-load protection of pumps. The no-load current setting amplifier circuit composed of R54 and operational amplifier I13 outputs a positive signal and enters the operational amplifier I14 to compare with the current reference signal entered by the lead-out line E3. The working current signal in the shutdown state is zero, and the lead-out line K1 is negative potential, which is controlled by the diode The zero maintenance circuit composed of D53, resistor R72 and electrolytic capacitor C10 makes the lead-out line E3 at negative potential, the output terminal of operational amplifier I14 is at positive potential, and the circuit is in the standby state. When the pump motor is started, the lead-out line K1 is at positive potential, controlled by the potentiometer W4, resistor R38, resistor R39 and operational amplifier I21 form a start-up time-avoidance setting circuit so that the lead-out line Y2 and lead-out line E3 are at negative potentials, the underload protection does not work during the start-time avoidance process, and the lead-out line Y2 after the start-time avoidance is over At positive potential, the lead-out line E3 becomes the current reference signal composed of Zener diode D61 and resistor R56. During normal operation, the working current signal is greater than the current reference signal, and the output terminal of operational amplifier I14 is still at positive potential. When the pump motor is under no load Equivalent to underload, the working current signal is less than the current reference signal. The underload protection works, the output terminal of the operational amplifier I14 becomes negative potential, the lead-out line Q4 is negative potential, and the light-emitting diode D46 lights up. The relay J is disconnected and shut down, and the circuit is in a fault shutdown state, press the FW reset button in Figure 8 to restore the circuit to the standby state. The specific implementation is carried out according to the circuit connection in Fig. 6 .

Figure 7 is a schematic diagram of the zero-sequence protection circuit. The working principle is a zero-sequence sampling amplifier circuit composed of a zero-sequence current transformer L0, a resistor R58, a resistor R76 and an operational amplifier I13. The amplified zero-sequence signal is sent to the operational amplifier I12 for comparison with the signal In comparison, when leakage or grounding occurs, the output terminal of the operational amplifier I12 is at negative potential, the lead-out line H3 is at negative potential, and the light-emitting diode D47 lights up, and the relay J is disconnected to stop. The specific implementation is carried out according to the circuit connection in Fig. 7 .

Figure 8 is a schematic diagram of the full-automatic time-delay double-control reset circuit and the running flashing indication circuit. The diode D52 and the electrolytic capacitor C06 form an automatic delay circuit. Any one of the output terminals of the multi-channel operational amplifier is negative potential and can control the automatic delay circuit to start delaying. When the delay ends, the output terminal of the operational amplifier I22 is a positive potential and controls multiple The circuit operational amplifier is reset, so it is called a fully automatic delay dual-control reset circuit. For example, when an overload occurs, the light-emitting diode D45 lights up, the relay J is disconnected to stop, the output terminal of the operational amplifier I18 is at a negative potential, the diode D26 pulls the resistor R41 and the resistor R43 to a negative potential, and the resistor R41 delays the charging of the electrolytic capacitor C06, waiting When the potential of the negative input terminal of the operational amplifier I22 is lower than the positive input terminal of the operational amplifier I22, the output terminal of the operational amplifier I22 is at a positive potential to control the reset of the operational amplifier I18, and the light emitting diode D45 goes out. The reset of the whole circuit is controlled by the lead wire F. When the whole machine is powered on, the power-on reset potential composed of diode D49, resistor R50 and electrolytic capacitor C04 instantly raises the lead wire F to a positive potential to reset the multi-channel operational amplifier. Reset the multiplex operational amplifier with the FW reset button. The operation indicator circuit is composed of operational amplifier I20, electrolytic capacitor C08 and light-emitting diode D48. When the working current is zero, the light-emitting diode D48 is on and does not flicker. When the working current increases, the light-emitting diode D48 is on and flashing. The flickering frequency of D48 is also increased. The specific implementation is carried out according to the circuit connection in Fig. 7 .

Figure 9 is the schematic diagram of the pump protection circuit, and Figure 10 is the schematic diagram of the power capacitor protection circuit. The pump protection circuit and the power capacitor protection circuit are examples of the practical application of the universal protector analog integrated circuit. Figure 1, Figure 2, and Figure 3 are selected. , Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8 are composed of unit circuits, and these unit circuits can also form protection circuits with various functions such as motor protectors and air compressor protectors. The precision of protection control is improved, circuit components are reduced, and the cost of the whole machine is reduced. The specific implementation plan is carried out according to the actual circuit connection, and the working principle of each unit circuit has been described above.

Claims (10)

1. Universal protector analog integrated circuit, including three-phase rectification and synthesis of four-output operational amplifier circuit, phase-splitting memory external control phase failure and three-phase current unbalance protection circuit, dual-ratio dual-control self-opening overload protection circuit, constant voltage And capacitor double feedback thermal memory overload protection circuit, zero-maintenance start-up avoidance underload protection circuit, zero-sequence protection circuit, fully automatic delay dual-control reset circuit, power capacitor capacity or working current online detection circuit, run/stop identification control circuit 1. The running flashing indication circuit is characterized in that the universal protector analog integrated circuit is a protection circuit that combines the motor protection circuit, the pump protection circuit, the air compressor protection circuit, the power capacitor protection circuit and the common characteristics of multiple protection circuits. The circuit unit unifies the current reference signal, arbitrarily selects the required unit circuit to form a protector with different functions, gathers several resistors, several diodes and several hundred components of several operational amplifiers in the circuit and makes them in a highly integrated microelectronics integration process. In the analog integrated circuit of the universal protector, several lead wires are used to lead the wiring that needs to be connected with the external circuit to the outside of the integrated circuit to form an analog integrated circuit of the universal protector. The resistors R1, R2 and R3 in the integrated circuit The resistance values are the same, the resistance values of resistor R4, resistance R5, and resistance R6 are the same, the resistance values of resistance R7, resistance R8, and resistance R9 are the same, the resistance values of resistance R10, resistance R11, and resistance R12 are the same, and the resistance values of resistance R16, resistance R17, and resistance The resistance value of R18 is the same, the resistance value of resistor R14 and resistor R15 is the same, the resistance value of resistor R33 is greater than the resistance value of resistor R34, the resistance value of resistor R38 is greater than the resistance value of resistor R39, and the resistance value of resistor R41 is greater than that of resistor R42 value, the resistance value of resistor R42 is greater than the resistance value of resistor R43, and other resistance values are determined according to the common characteristics of multiple protection circuits. The terminal V0 is connected to the lead wire V3 and enters the integrated circuit. The circuit structure of the three-phase rectification and synthesis of the four-output operational amplifier circuit in the universal protector analog integrated circuit is that the three-phase current AC signals are respectively amplified and rectified by three operational amplifiers and converted into DC signals, respectively. Three-phase current DC signals are output, and the output terminals of three operational amplifier followers are connected in parallel to synthesize and output the current signal of the highest phase among the three phases. The specific circuit is that the three-phase current signals are respectively sampled by the connection line of current transformer L1 L01 connects the resistor R46 and the lead wire A1 to enter the integrated circuit, the connection line L02 of the current transformer L2 connects the resistor R47 and the lead wire B1 to enter the integrated circuit, the connection line L03 of the current transformer L3 connects the resistor R48 and the lead wire C1 to enter the integrated circuit, The other end of the current transformer L1 and the other end of the resistor R46 are connected to the common terminal V0, the other end of the current transformer L2 and the other end of the resistor R47 are connected to the common terminal V0, and the other end of the current transformer L3 is connected to the other end of the resistor R48 The common terminal V0, the lead line A1 is connected to the operational amplifier The positive input terminal of I1, the lead-out line B1 is connected to the positive input terminal of the operational amplifier I2, the lead-out line C1 is connected to the positive input terminal of the operational amplifier I3, the negative input terminal of the operational amplifier I1 is connected to resistors R1 and resistor R4, and the negative input terminal of the operational amplifier I2 Terminals are connected to resistor R2 and resistor R5, the negative input terminal of operational amplifier I3 is connected to resistor R3 and resistor R6, the other end of resistor R1, resistor R2 and resistor R3 are connected to common terminal V0, the output terminal of operational amplifier I1 is connected to the positive pole of diode D1, The output terminal of the operational amplifier I2 is connected to the positive pole of the diode D2, the output terminal of the operational amplifier I3 is connected to the positive pole of the diode D3, and the other end of the resistor R4 is connected to the negative pole of the diode D1, the resistor R7, the resistor R10, the lead wire A2 and the positive pole of the operational amplifier I4 The other end of the resistor R5 is connected to the negative pole of the diode D2, the resistor R8, the resistor R11, the lead wire B2 and the positive input of the operational amplifier I5, and the other end of the resistor R6 is connected to the negative pole of the diode D3, the resistor R9, the resistor R12 and the lead wire. Line C2 and the positive input terminal of operational amplifier I6, the other end of resistor R7, resistor R8 and resistor R9 are connected to common terminal V0, the output terminal of operational amplifier I4 is connected to the positive pole of diode D4, and the output terminal of operational amplifier I5 is connected to the positive pole of diode D5 , the output terminal of the operational amplifier I6 is connected to the positive pole of the diode D6, the negative input terminal of the operational amplifier I4 and the negative input terminal of the operational amplifier I5 and the negative input terminal of the operational amplifier I6 and the negative pole of the diode D4 and the negative pole of the diode D5 and the diode D6 The negative pole is connected with the resistor R13 and the resistor R15 and the lead wire S1, the other end of the resistor R15 is connected with the resistor R14 and the negative input terminal of the operational amplifier I7, the positive input terminal of the operational amplifier I7 is connected with the common terminal V0, and the other end of the resistor R14 is connected with the operational The output terminal of the amplifier I7 and the lead-out line S2, the lead-out line A1 is the input terminal of the A-phase current signal, the lead-out line B1 is the input terminal of the B-phase current signal, the lead-out line C1 is the input terminal of the C-phase current signal, and the lead-out line A2 is the A-phase current signal input terminal. The signal rectification and amplification output terminal, the lead-out line B2 is the B-phase current signal rectification and amplification output terminal, the lead-out line C2 is the C-phase current signal rectification and amplification output terminal, the lead-out line A2 is connected to the positive pole of the electrolytic capacitor C01 outside the integrated circuit, and the lead-out line B2 is integrated The positive pole of the electrolytic capacitor C02 is connected to the outside of the circuit, and the lead line C2 is connected to the positive pole of the electrolytic capacitor C03 outside the integrated circuit. The negative pole of the electrolytic capacitor C01, the negative pole of the electrolytic capacitor C02, and the negative pole of the electrolytic capacitor C03 are connected to the common terminal V0. The lead line S1 is the composite output highest phase operating current The positive signal output terminal, the lead-out line S2 is the negative signal output terminal of the highest phase working current of the composite output, which is used for external connection of the integrated circuit to other protection functions. The performance of the current transformer L1, current transformer L2, and current transformer L3 outside the integrated circuit is the same. The resistance values of the resistor R46, the resistor R47, and the resistor R48 are the same, and the capacities of the electrolytic capacitor C01, the electrolytic capacitor C02, and the electrolytic capacitor C03 are the same. 2. According to the said universal protector analog integrated circuit of claim 1, it is characterized in that in the universal protector analog integrated circuit, the phase-splitting memory external control type phase failure and three-phase current imbalance protection circuit are composed of three operational amplifiers A three-phase three-comparison circuit is formed respectively, and the three-phase current signals are respectively compared with the comparison signal to determine the fault protection. The comparison signal is formed by the current signal division of the highest phase of the three-phase output in the three-phase rectification synthesis four-output operational amplifier circuit. The signal is externally controlled by the rated current. The specific circuit is that one end of the resistor R13 is connected to the lead wire S1, and the other end of the resistor R13 is connected to the negative input terminal of the operational amplifier I8, the negative input terminal of the operational amplifier I9, and the negative input terminal and the lead wire of the operational amplifier I10. E4, one end of the resistor R10 is connected to the lead wire A2, the other end of the resistor R10 is connected to the positive input terminal of the operational amplifier I8, the negative pole of the diode D22 and the resistor R16, the other end of the resistor R16 is connected to the positive pole of the diode D16, and the negative pole of the diode D16 is connected to the negative pole of the operational amplifier I8 The output terminal is connected to the cathode of diode D10 and the cathode of diode D29, the anode of diode D10 is connected to lead wire A3, one end of resistor R11 is connected to lead wire B2, the other end of resistor R11 is connected to the positive input terminal of operational amplifier I9 and the cathode of diode D23 and resistor R17, the resistor The other end of R17 is connected to the anode of the diode D17, the cathode of the diode D17 is connected to the output terminal of the operational amplifier I9, the cathode of the diode D11 and the cathode of the diode D30, the anode of the diode D11 is connected to the lead wire B3, one end of the resistor R12 is connected to the lead wire C2, and the other end of the resistor R12 Connect the positive input terminal of the operational amplifier I10 to the negative pole of the diode D24 and the resistor R18, the other end of the resistor R18 is connected to the positive pole of the diode D18, the negative pole of the diode D18 is connected to the output terminal of the operational amplifier I10 and the negative pole of the diode D12 and the negative pole of the diode D31, and the positive pole of the diode D12 is connected to the output Line C3 and lead-out line E4 are the connection points of phase failure and three-phase current unbalance protection comparison signals. Lead-out line E4 is connected to resistor R49 to obtain phase failure and three-phase current unbalance protection comparison signals. The other end of resistor R49 is connected to common terminal V0 , when the lead-out line E4 is connected to the lead-out line K2 through the diode D51 and the resistor R55, the phase failure and three-phase current unbalance protection are controlled to protect when the working current is greater than the specified value of the rated current. The output control terminal when it is unbalanced. The lead-out line B3 is the output control terminal when the B-phase current is open or unbalanced. The lead-out line C3 is the output control terminal when the C-phase current is open-phase or unbalanced. The lead-out line A3 is connected to the negative pole of the light-emitting diode D41. The lead wire B3 is connected to the negative pole of the light-emitting diode D42, the lead-out line C3 is connected to the negative pole of the light-emitting diode D43, the positive pole of the light-emitting diode D41, the positive pole of the light-emitting diode D42 and the positive pole of the light-emitting diode D43 are connected to the resistor R69 and the negative pole of the Zener diode D59, and the positive pole of the Zener diode D59 Connect the base of the resistor R70 and the transistor BG, and the other end of the resistor R69 is connected to the positive power supply VDD and the cathode of the diode D55 and the relay J, the other end of the relay J is connected to the anode of the diode D55 and the collector of the triode BG, and the other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG. 3. According to the said universal protector analog integrated circuit according to claim 1, it is characterized in that in the universal protector analog integrated circuit, the dual-ratio dual-control self-opening overload protection circuit is an inverse time limit when the working current exceeds the specified value of the rated current. Protect the circuit, synthesize and output the negative signal of the highest phase working current through the lead-out line S2 to connect the resistor R51 of the external overload protection setting circuit of the integrated circuit, the other end of the resistor R51 is connected to the fixed end of the potentiometer W1, the sliding end and the lead-out line G2, and the other end of the potentiometer W1 A certain end is connected to the lead-out line G1, the lead-out line G2 is connected to the negative input terminal of the operational amplifier I15, the positive input terminal of the operational amplifier I15 is connected to the common terminal V0, and the lead-out line G1 is connected to the output terminal of the operational amplifier I15, the resistor R25, the resistor R32 and the resistor R0, the other end of the resistor R25 is connected to the positive input terminal of the operational amplifier I16, the resistor R26, the resistor R27 and the lead wire G4, the other end of the resistor R26 is connected to the common terminal V0, and the negative input terminal of the operational amplifier I16 is connected to the resistor R33 and the lead wire E1 , the output terminal of the operational amplifier I16 is connected to the negative pole of the diode D33 and the lead wire K2, the other end of the resistor R27 is connected to the positive pole of the diode D34, the negative pole of the diode D34 is connected to the positive pole of the diode D35, and the negative pole of the diode D35 is connected to the positive pole of the diode D36 and the diode The negative pole of D37, resistor R28, resistor R29 and the negative input terminal of the operational amplifier I17 and the lead wire G3, the other end of the resistor R28 is connected to the positive pole of the diode D33, the positive input terminal of the operational amplifier I17 is connected to the common terminal V0, and the negative pole of the diode D36 is connected to Positive power supply VDD, the output terminal of the operational amplifier I17 is connected to the anode of the diode D37, the other end of the resistor R29 is connected to the lead wire G5, the lead wire G5 is connected to the lead wire G6 outside the integrated circuit, and the lead wire G6 is connected to the resistor R30 inside the integrated circuit. The other end of R30 is connected to the negative input terminal of the operational amplifier I18, the positive input terminal of the operational amplifier I18 is connected to the resistor R31, the negative pole of the diode D19 and the lead wire E2, the other end of the resistor R31 is connected to the positive pole of the diode D13, and the output terminal of the operational amplifier I18 is connected to The negative pole of diode D13, the negative pole of diode D26 and the negative pole of diode D7, the positive pole of diode D7 is connected to lead wire G7, which is the output control terminal when the current is overloaded, the lead wire G7 is connected to the negative pole of light-emitting diode D45, and the positive pole of light-emitting diode D45 is connected to the resistor R69 and the negative pole of the Zener diode D59, the positive pole of the Zener diode D59 is connected to the base of the resistor R70 and the transistor BG, the other end of the resistor R69 is connected to the positive power supply VDD and the negative pole of the diode D55 and the relay J, and the other end of the relay J is connected to the diode D55 The positive electrode and the collector of the triode BG, the other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG, the lead-out line E2 is the reference signal for current overload protection, and the lead-out line E2 is connected to the lead-out line E1 and the reference signal source through the resistor R66 Zener diode D61 negative pole and resistor R56, resistor R56 The other end of the voltage regulator diode D57 is connected to the positive power supply VDD, and the anode of the Zener diode D57 is connected to the common terminal V0. 4. According to the said universal protector analog integrated circuit according to claim 1, it is characterized in that the constant voltage and capacitance double feedback thermal memory overload protection circuit in the universal protector analog integrated circuit synthesizes and outputs the highest phase operating current negative signal through the lead-out Line S2 is connected to the resistor R51 of the external overload protection setting circuit of the integrated circuit, the other end of the resistor R51 is connected to the fixed end of the potentiometer W1, the sliding end and the lead wire G2, the other fixed end of the potentiometer W1 is connected to the resistor R55 and the lead wire G1, and the lead wire G1 Connect the output terminal of the operational amplifier I15, the lead line G2 is connected to the negative input terminal of the operational amplifier I15, the positive input terminal of the operational amplifier I15 is connected to the common terminal V0, the other end of the external resistor R55 is connected to the resistor R54 and the lead wire Q3, and the other end of the resistor R54 Connect the common terminal V0, the lead-out line Q3 is connected to the positive input terminal of the operational amplifier I13, the negative input terminal of the operational amplifier I13 is connected to the lead-out line Q2, the output terminal of the operational amplifier I13 is connected to the lead-out line Q1, and the lead-out line Q1 is connected to the external resistor R60 and the resistor R61 , the other end of resistor R61 is connected to resistor R62 and the negative pole of Zener diode D60, the other end of resistor R62 is connected to resistor R63, resistor R64 and the cathode of diode D57, and the other end of resistor R64 is connected to the positive pole of Zener diode D60 and the common terminal V0 , the other end of the resistor R63 is connected to the positive pole of the diode D57 and the negative pole of the electrolytic capacitor C09 and the resistor R65 is connected to the lead wire Q2, the other end of the resistor R65 is connected to the common terminal V0, the other end of the resistor R60 is connected to the positive pole of the diode D50, and the negative pole of the diode D50 is connected to The positive electrode of the electrolytic capacitor C09 and the resistor R59 are then connected to the lead wire G6, the other end of the resistor R59 is connected to the common terminal V0, the lead wire G6 is connected to the internal resistor R30, the other end of the resistor R30 is connected to the negative input end of the operational amplifier I18, and the positive terminal of the operational amplifier I18 The input end is connected to the resistor R31 and the lead wire E2, the other end of the resistor R31 is connected to the anode of the diode D13, the output end of the operational amplifier I18 is connected to the cathode of the diode D13 and the cathode of the diode D7, the anode of the diode D7 is connected to the lead wire G7, and the lead wire E2 is connected to External resistor R68 and resistor R74, the other end of the resistor R68 is connected to the common terminal V0, the other end of the resistor R74 is connected to the positive power supply VDD, the lead wire G7 is connected to the negative pole of the light-emitting diode D45, the positive pole of the light-emitting diode D45 is connected to the negative pole of the resistor R69 and the Zener diode D59 , the anode of the Zener diode D59 is connected to the resistor R70 and the base of the triode BG, the other end of the resistor R69 is connected to the positive power supply VDD and the cathode of the diode D55 and the relay J, and the other end of the relay J is connected to the anode of the diode D55 and the collector of the triode BG, The other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG. 5. According to the said universal protector analog integrated circuit according to claim 1, it is characterized in that in the universal protector analog integrated circuit, the zero-maintenance start-up avoidance underload protection circuit structure is composed of an operational amplifier and an external potentiometer of the integrated circuit The underload setting circuit uses the operational amplifier I13 to amplify the current setting, uses the operational amplifier I14 to compare and amplify the operating current and the reference signal, and uses the operational amplifier I21 to start the time avoidance control, and the underload protection cannot be activated during the start time avoidance process Function, when the circuit is in the stop state, the circuit is maintained at zero to avoid misoperation, and the negative signal of the highest phase operating current is synthesized and output through the lead line S2 to connect the resistor R52 of the external underload protection setting circuit of the integrated circuit, and the other end of the resistor R52 is connected to the fixed end of the potentiometer W2 and The sliding end and lead-out line Q2, the other fixed end of the potentiometer W2 is connected to the lead-out line Q1, the lead-out line Q2 is connected to the negative input terminal of the operational amplifier I13, the positive input terminal of the operational amplifier I13 is connected to the lead-out line Q3, and the lead-out line Q3 is connected to the outside of the integrated circuit The resistor R54, the other end of the resistor R54 is connected to the common terminal V0, the lead wire Q1 is connected to the output terminal of the operational amplifier I13 and the resistor R21, the other end of the resistor R21 is connected to the positive input terminal of the operational amplifier I14, the resistor R23 and the negative pole of the diode D20, The other end of the resistor R23 is connected to the positive pole of the diode D14, the negative input terminal of the operational amplifier I14 is connected to the negative pole of the diode D25, the positive pole of the diode D32 and the lead wire E3, the positive pole of the diode D25 is connected to the common terminal V0, and the negative pole of the diode D32 is connected to the resistor R24. The other end of the resistor R24 is connected to the output terminal of the operational amplifier I21 of the start-up time avoidance circuit and the lead line Y2, the cathode of the diode D14 is connected to the output terminal of the operational amplifier I14, the negative pole of the diode D27 and the negative pole of the diode D8, and the positive pole of the diode D8 is connected to the lead wire Line Q4 and lead-out line E3 are the current underload protection reference signal. Lead-out line E3 is connected to the external resistor R67 and resistor R72 of the integrated circuit. The other end of the resistor R67 is connected to the negative pole of the reference circuit regulator D61 and the resistor R56. The other end of the resistor R56 Connect the positive power supply VDD, the positive pole of the regulator tube D61 is connected to the common terminal V0, the other end of the resistor R72 is connected to the positive pole of the diode D53 and the positive pole of the electrolytic capacitor C10, the negative pole of the electrolytic capacitor C10 is connected to the negative power supply VCC, and the negative pole of the diode D53 is connected to the positive pole of the electrolytic capacitor C07 And lead-out line K1, the negative electrode of electrolytic capacitor C07 is connected to the fixed end of potentiometer W4, the sliding end and lead-out line Y1, the other fixed end of potentiometer W4 is connected to negative power supply VCC, the lead-out line Y1 is connected to the negative input end of operational amplifier I21, and the negative input end of operational amplifier I21 The positive input end is connected to the resistor R38 and the resistor R39, the other end of the resistor R38 is connected to the positive power supply VDD, the other end of the resistor R39 is connected to the negative power supply VCC, the lead wire Q4 is connected to the negative pole of the light-emitting diode D46, and the positive pole of the light-emitting diode D46 is connected to the resistor R69 and the stabilizer The negative pole of the voltage regulator diode D59, the positive pole of the Zener diode D59 is connected to the base of the resistor R70 and the triode BG, The other end of the resistor R69 is connected to the positive power supply VDD, the negative pole of the diode D55 and the relay J, the other end of the relay J is connected to the positive pole of the diode D55 and the collector of the triode BG, and the other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG. 6. According to the said universal protector analog integrated circuit of claim 1, it is characterized in that the zero-sequence protection circuit in the universal protector analog integrated circuit, one end of the zero-sequence current transformer L0 is connected with a resistor R58, and the zero-sequence current transformer L0 The other end is connected to the common terminal V0, the other end of the resistor R58 is connected to the resistor R76 and the lead wire H2, the other end of the resistor R76 is connected to the lead wire H1, the lead wire H2 is connected to the negative input terminal of the operational amplifier I11, and the positive input terminal of the operational amplifier I11 is connected to The common terminal V0, the output terminal of the operational amplifier I11 is connected to the anode of the diode D0, the lead wire H1 is connected to the negative terminal of the diode D0 and the resistor R22, the other end of the resistor R22 is connected to the negative input terminal of the operational amplifier I12, and the positive input terminal of the operational amplifier I12 is connected to the diode D21 The negative pole of the resistor R19 and the resistor R20, the other end of the resistor R19 is connected to the negative power supply VCC, the other end of the resistor R20 is connected to the negative pole of the diode D15, and the output terminal of the operational amplifier I12 is connected to the positive pole of the diode D15 and the negative pole of the diode D28 and the negative pole of the D9 , the anode of D9 is connected to the lead wire H3, the lead wire H3 is connected to the cathode of the light-emitting diode D47, the anode of the light-emitting diode D47 is connected to the resistor R69 and the cathode of the Zener diode D59, and the anode of the Zener diode D59 is connected to the resistor R70 and the base of the triode BG , the other end of the resistor R69 is connected to the positive power supply VDD, the negative pole of the diode D55 and the relay J, the other end of the relay J is connected to the positive pole of the diode D55 and the collector of the triode BG, and the other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG. 7. According to the said universal protector analog integrated circuit according to claim 1, it is characterized in that in the universal protector analog integrated circuit, a dual-control automatic time-delay multi-channel reset circuit, each protection output terminal is connected to form an OR gate circuit Control the reset delay circuit, the output end of the reset delay circuit is simultaneously connected to control the reset of each protection output end, the cathode of the diode D26 is connected to the output end of the operational amplifier I18, the cathode of the diode D27 is connected to the output end of the operational amplifier I14, and the cathode of the diode D28 Connect the output terminal of the operational amplifier I12, the negative pole of the diode D29 is connected with the output terminal of the operational amplifier I8, the negative pole of the diode D30 is connected with the output terminal of the operational amplifier I9, the negative pole of the diode D31 is connected with the output terminal of the operational amplifier I10, the positive pole of the diode D26 and the diode The positive pole of D27 and the positive pole of diode D28 and the positive pole of diode D29 and the positive pole of diode D30 and the positive pole of diode D31 connect resistance R41 and resistance R43 together, and the other end of resistance R43 connects the positive input terminal of operational amplifier I22 and the positive pole of diode D40 and Resistor R42, the cathode of diode D40 is connected to resistor R44 and resistor R45, the other end of resistor R45 is connected to common terminal V0, the other end of resistor R42 and resistor R44 is connected to positive power supply VDD, and the other end of resistor R41 is connected to the negative input terminal of operational amplifier I22 and lead line Z, the cathode of diode D19 is connected to the positive input terminal of operational amplifier I18, the negative pole of diode D20 is connected to the positive input terminal of operational amplifier I14, the negative pole of diode D21 is connected to the positive input terminal of operational amplifier I12, and the negative pole of diode D22 is connected to the operational amplifier I12. The positive input terminal of the amplifier I8, the negative pole of the diode D23 is connected to the positive input terminal of the operational amplifier I9, the negative pole of the diode D24 is connected to the positive input terminal of the operational amplifier I10, the positive pole of the diode D19 and the positive pole of the diode D20 and the positive pole of the diode D21 and the diode The positive pole of D22, the positive pole of diode D23 and the positive pole of diode D24 are connected together with resistor R40 and lead-out line F, the output terminal of operational amplifier I22 and resistor R40, and lead-out line F is connected with reset button FW and the negative pole of diode D49 outside the integrated circuit, The other end of the reset button FW is connected to the positive pole of the electrolytic capacitor C04 and the positive power supply VDD, the positive pole of the diode D49 is connected to the negative pole of the electrolytic capacitor C04 and the resistor R50, the other end of the resistor R50 is connected to the negative power supply VCC, and the lead Z is connected to the electrolytic capacitor outside the integrated circuit. The negative pole of the capacitor C06 and the negative pole of the diode D52, the positive pole of the electrolytic capacitor C06 are connected to the positive power supply VDD, the positive pole of the diode D52 is connected to the lead line K1, and the lead line F is the main connection line for external power-on reset, manual reset and internal automatic reset. 8. According to the said universal protector analog integrated circuit according to claim 1, it is characterized in that the operation flashing indicator circuit in the universal protector analog integrated circuit, when the operating current is higher than a certain value, the operating indicator flashing frequency and working The current is proportional to the current, and the running indicator light stops flashing when the machine is shut down or fails. The positive input of the operational amplifier I20 is connected to the resistor R35 and the resistor R36. The other end of the resistor R35 is connected to the positive pole of the diode D38 and the common terminal V0. The negative input of the operational amplifier I20 Connect the cathode of the diode D38 and the anode of the diode D39, the resistor R0 and the lead wire X1, the cathode of the diode D39 is connected to the resistor R37, the other end of the resistor R37 and the other end of the resistor R36 are connected to the output terminal of the operational amplifier I20 and the lead wire X2, The lead-out line X2 is connected to the resistor R57 outside the integrated circuit, the other end of the resistor R57 is connected to the positive pole of the light-emitting diode D48, the negative pole of the light-emitting diode D48 is connected to the common terminal V0, and the lead-out line X1 is connected to the positive pole of the diode D54 outside the integrated circuit and the positive pole of the electrolytic capacitor C08 , the negative pole of the electrolytic capacitor C08 is connected to the common terminal V0, the negative pole of the diode D54 is connected to the positive pole of the light-emitting diode D41 and the positive pole of the light-emitting diode D42 and the positive pole of the light-emitting diode D43 and the positive pole of the light-emitting diode D45 and the positive pole of the light-emitting diode D46 and the positive pole of the light-emitting diode D47 The positive pole and the negative pole of the Zener diode D59 and the resistor R69, the positive pole of the Zener diode D59 is connected to the resistor R70 and the base of the transistor BG, the other end of the resistor R69 is connected to the positive power supply VDD and the negative pole of the diode D55 and the relay J, the other end of the relay J The anode of the diode D55 is connected to the collector of the triode BG, and the other end of the resistor R70 is connected to the negative power supply VCC and the emitter of the triode BG. 9. According to the said universal protector analog integrated circuit according to claim 1, it is characterized in that the online detection power capacitor capacity or the working current online detection circuit in the universal protector analog integrated circuit, the negative signal of the working current is connected and integrated through the lead-out line S2 The circuit external circuit resistor R53, the other end of the resistor R53 is connected to the potentiometer W3 and the lead wire H2, the other end of the potentiometer W3 is connected to the external digital display terminal CS and the lead wire H1 to enter the integrated circuit, and the lead wire H2 is connected to the negative input of the operational amplifier I11 terminal, the positive input terminal of the operational amplifier I11 is connected to the common terminal V0, the output terminal of the operational amplifier I11 is connected to the positive pole of the diode D0, the lead-out line H1 is connected to the negative pole of the diode D0 and the resistor R22, and the online detection power capacitor is between the lead-out line H1 and the common terminal V0 The signal output terminal of capacity or working current is connected to the external digital display terminal CS. 10. According to the said universal protector analog integrated circuit of claim 1, it is characterized in that the operation/stop recognition control circuit in the universal protector analog integrated circuit, the positive input terminal of the operational amplifier I19 is connected to the resistor R32, and the other end of the resistor R32 Connect the resistor R0 to the output terminal of the operational amplifier I15 and the lead wire G1, connect the negative input terminal of the operational amplifier I19 to the resistor R33 and the resistor R34, connect the other end of the resistor R33 to the negative input terminal of the operational amplifier I16 and the lead wire E1, and connect the other end of the resistor R34 to The common terminal V0, the output terminal of the operational amplifier I19 is connected to the lead wire K1, the lead wire K1 is connected to the anode of the electrolytic capacitor C07 and the cathode of the diode D53 outside the integrated circuit for pump protection, and the lead wire K1 is connected to the diode outside the integrated circuit for power capacitor protection The cathode of D56 and the anode of diode D52.

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