CN102611068B - 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. The small size significantly improves the protection accuracy, simplifies the structure and process of the protector shell, reduces the cost of the whole machine, and 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 object of the present invention is to provide a kind of universal protector analog integrated circuit in view of the above-mentioned many defects, and several resistances, diodes, operational amplifiers are designed in an integrated circuit, and 100 components and parts become one component, can significantly reduce Protector circuit board area and shell size; three-phase rectification synthesis 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 output terminals connected in parallel Synthesis, avoiding the nonlinear phenomenon caused by diodes, and realizing high-precision sampling amplification; three-phase rectification synthesis 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 broken phase and three-phase unbalance, the highest phase current needs to exceed the rated current to play a protective role, and the phase-separated fault memory indication is given, because when the working current of the motor does not exceed the rated current, the broken phase and three-phase unbalanced The motor is not harmful and should not be protective; 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 operating current and the reference signal to control the operating current When the specified value of the rated current is exceeded, 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 action protection of the output relay; the constant voltage and capacitance double feedback thermal memory overload protection circuit is used for calculation The amplifier I15 amplifies the current setting, and the operational amplifier I13 is used to perform 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 due to overload After shutting down for protection, the electric energy stored in the capacitor is discharged through the resistor until the stored energy is fully released before starting up for the second time. This process is overload thermal memory and heat release, allowing the overloaded and heated motor to cool down before starting; The 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 operating current with the reference signal, controls the output relay action protection, and uses the operational amplifier I21 to start the time-avoidance control underload The protection circuit performs start-time avoidance when the pump motor is started, and the underload protection does not work during the start-time 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, and the zero-sequence The 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 delayed dual-control reset, and any fault output can control the start Delay, after the delay is over, the output terminal of the operational amplifier I22 controls each fault circuit to automatically reset; the motor protection and 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 online detection capacity of the power capacitor protection Use operational amplifier I11 to amplify and adjust the output value and power voltage The capacity of the container is the same; the operating amplifier I19 is used for the identification control circuit when running and stopping, and the phase separation memory is turned on when running, the externally controlled phase failure and three-phase current unbalance protection circuit, the zero-maintenance start-up avoidance under-load protection circuit and automatic time delay 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 identification control circuit and the running flashing indication circuit are characterized in that the universal protector analog integrated circuit is a general protection circuit unit composed of motor protection circuit, pump protection circuit, air compressor protection circuit and power capacitor protection circuit. Unify the current reference signal, select the required unit circuit to form a protector with different functions, and use the microelectronics integration process to manufacture the resistor, diode and operational amplifier components in the integrated universal protector analog integrated circuit. The lead-out wire leads the wiring that needs to be connected with the external circuit to the outside of the integrated circuit to form a universal protector analog integrated circuit. The resistance values of the resistors R1, R2, and R3 in the integrated circuit are the same, and the resistance values of the resistors R4, R5, and R6 are the same. The resistance values are the same, the resistance values of resistor R7, resistor R8, and resistor R9 are the same, the resistance values of resistor R10, resistor R11, and resistor R12 are the same, the resistance values of resistor R16, resistor R17, and resistor R18 are the same, and the resistance values of resistor R14 and resistor R15 are the same. The same value, 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, 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 , the positive power supply VDD is connected to the lead wire V1 to enter the integrated circuit, the negative power supply VCC is connected to the lead wire V2 to enter the integrated circuit, the common terminal V0 is connected to the lead wire V3 to enter the integrated circuit, and the three-phase rectification synthesized four-output operational amplifier in the universal protector analog integrated circuit The circuit structure of the circuit is that the three-phase current AC signals are respectively amplified and rectified by three operational amplifiers and converted into DC signals, and the three-phase current DC signals are respectively output, and the output terminals of the three operational amplifier followers are connected in parallel to synthesize and output the three-phase The current signal of the highest phase, the specific circuit is that the three-phase current signal enters the integrated circuit from the connection line L01 of the sampling current transformer L1 to the resistor R46 and the lead-out line A1, and the connection line L02 of the current transformer L2 is connected to the resistor R47 and the lead-out line B1 enters the integrated circuit, the connection line L03 of the current transformer L3 connects the resistor R48 and the lead line 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 is connected to the common terminal V0, the other end of the current transformer L3 and the other end of the resistor R48 are connected to the common terminal V0, the lead-out line A1 is connected to the positive input of the operational amplifier I1, and the lead-out line B1 is connected to the positive input of the operational amplifier I2 terminal, the lead line C1 is connected to the operational amplifier The positive input terminal of I3, the negative input terminal of operational amplifier I1 are connected to resistor R1 and resistor R4, the negative input terminal of operational amplifier I2 is connected to resistor R2 and resistor R5, the negative input terminal of operational amplifier I3 is connected to resistor R3 and resistor R6, resistor R1 The other end of the resistor R2 and the resistor R3 is connected to the common terminal V0, the output terminal of the operational amplifier I1 is connected to the positive pole of the diode D1, the output terminal of the operational amplifier I2 is connected to the positive pole of the diode D2, and the output terminal of the operational amplifier I3 is connected to the positive pole of the diode D3. The other end of the resistor R4 is connected to the cathode of the diode D1, the resistor R7, the resistor R10, the lead wire A2 and the positive input of the operational amplifier I4, and the other end of the resistor R5 is connected to the cathode of the diode D2, the resistor R8, the resistor R11 and the lead wire B2 and The positive input terminal of the operational amplifier I5, the other end of the resistor R6 is connected to the negative pole of the diode D3, the resistor R9, the resistor R12, the lead line 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, the output terminal of the operational amplifier I5 is connected to the positive pole of the 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 is connected to the positive pole of the operational amplifier I5 The negative input terminal of the operational amplifier I6 and the negative terminal of the diode D4 and the negative terminal of the diode D5 and the negative terminal of the diode D6 are connected together with the resistor R13, the resistor R15 and the lead wire S1, and the other end of the resistor R15 is connected with the resistor R14 and the operation The negative input terminal of the amplifier I7, the positive input terminal of the operational amplifier I7 are connected to the common terminal V0, the other end of the resistor R14 is connected to the output terminal of the operational amplifier I7 and the lead line S2, the lead line A1 is the input terminal of the A-phase current signal, and the lead line B1 It is the input terminal of the B-phase current signal, and the lead-out line C1 is the input terminal of the C-phase current signal. The phase current signal is rectified and amplified output terminal, the lead-out line A2 is connected to the positive pole of the electrolytic capacitor C01 outside the integrated circuit, the lead-out line B2 is connected to the positive pole of the electrolytic capacitor C02 outside the integrated circuit, the lead-out line C2 is connected to the positive pole of the electrolytic capacitor C03 outside the integrated circuit, and the electrolytic capacitor C01 The negative pole and 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-out line S1 is the output terminal of the positive signal of the highest phase working current of the composite output, and the lead-out line S2 is the negative signal output terminal of the working current of the highest phase of the composite output, for external use of the integrated circuit Connect other protection functions, the current transformer L1, current transformer L2, and current transformer L3 outside the integrated circuit have the same performance, the resistance values of the resistors R46, R47, and R48 are the same, and the electrolytic capacitor C01, electrolytic capacitor C02, and electrolytic capacitor C03 same capacity.

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 19, 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 and the negative pole of the diode D11 and the negative pole of the diode D30. The input terminal and the cathode of the diode D24 and the resistor R18, the other end of the resistor R18 is connected to the anode of the diode D18, the cathode of the diode D18 is connected to the output terminal of the operational amplifier I10 and the cathode of the diode D12 and the cathode of the diode D31, and the anode of the diode D12 is connected to the lead wire C3 and the lead wire E4 It 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 the diode When D51 and resistor R55 are connected to the lead wire 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 wire A3 is the output control terminal when the A phase current is broken or 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, and the lead-out line B3 is connected to the light-emitting diode The negative pole of D42, the lead wire C3 is connected to the negative pole of the LED D43, the positive pole of the LED D41 and the positive pole of the LED D42 and the positive pole of the LED 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 is connected to the resistor R70 and the triode BG The base of the resistor R69 is connected to the positive power supply VDD and the cathode of the diode D55 and the relay J, the relay The other end of the resistor 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 D61 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 the automatic delay double control reset circuit in the universal protector analog integrated circuit, each protection output terminal is connected to form an OR gate circuit to control the reset delay circuit, and the reset delay The output terminals of the circuit are simultaneously connected to control the reset of each protection output terminal, the cathode of the diode D26 is connected to the output terminal of the operational amplifier I18, the cathode of the diode D27 is connected to the output terminal of the operational amplifier I14, the negative pole of the diode D28 is connected to the output terminal of the operational amplifier I12, and the diode D28 is connected to the output terminal of the operational amplifier I12. The negative pole of D29 is connected to the output terminal of operational amplifier I8, the negative pole of diode D30 is connected to the output terminal of operational amplifier I9, the negative pole of diode D31 is connected to the output terminal of operational amplifier I10, the positive pole of diode D26 and the positive pole of diode D27 and the positive pole of diode D28 and The anode of diode D29, the anode of diode D30 and the anode of diode D31 are connected to resistor R41 and resistor R43 together, the other end of resistor R43 is connected to the positive input terminal of operational amplifier I22 and the anode of diode D40 and resistor R42, and the cathode of diode D40 is connected to resistor R44 and 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 Z, and the negative electrode of the diode D19 Connect the positive input terminal of the operational amplifier I18, the negative pole of the diode D20 is connected to the positive input terminal of the operational amplifier I14, the negative pole of the diode D21 is connected to the positive input terminal of the operational amplifier I12, the negative pole of the diode D22 is connected to the positive input terminal of the operational amplifier I8, and the diode D23 The cathode of the diode D24 is connected to the positive input of the operational amplifier I10, 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 and the diode The anode of D24 is connected 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 is connected to the electrolytic capacitor The positive pole of C04 is connected to 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 negative pole of the electrolytic capacitor C06 and the negative pole of the diode D52 outside the integrated circuit. The anode of the electrolytic capacitor C06 is connected to the positive power supply VDD, the anode 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;

The outside of the universal protector analog integrated circuit in the figure: 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 common terminal, C01-C11 electrolytic capacitor, 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 universal protector analog integrated circuit. The universal protector analog integrated circuit is composed of motor protection circuit, pump protection circuit, air compressor protection circuit, power capacitor protection circuit and multiple protection circuits. The general-purpose protection circuit unit, unifies the current reference signal, selects the required unit circuit to form a protector with different functions, gathers the resistors, diodes and multiple components of the operational amplifier in the circuit, and uses the microelectronics integration process to make it in an integrated Wan In the analog integrated circuit with the protector, entrust the microelectronic integrated circuit manufacturer to make the integrated circuit according to the requirements of the circuit of the present invention, the performance of the operational amplifier in the circuit with reference to the 324 operational amplifier, the resistance value of the resistor R1, resistor R2, and resistor R3 in the circuit The same, the resistance values of resistor R4, resistor R5, and resistor R6 are the same, the resistance values of resistor R7, resistor R8, and resistor R9 are the same, the resistance values of resistor R10, resistor R11, and resistor R12 are the same, and the resistor values of resistor R16, resistor R17, and resistor R18 are the same. The resistance values are the same, the resistance values of the resistance R14 and the resistance R15 are the same, the resistance value of the resistance R33 is greater than the resistance value of the resistance R34, the resistance value of the resistance R38 is greater than the resistance value of the resistance R39, the resistance value of the resistance R41 is greater than the resistance value of the resistance R42, The resistance value of resistor R42 is greater than the resistance value of resistor R43. Other resistance values are determined according to multiple protection circuits. There is no special requirement for diodes. Use lead wires to lead the wiring that needs to be connected to external circuits to the outside of the integrated circuit to form a universal protector. In the 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 unbalanced three-phase current during operation, the lead-out line A3 or lead-out line B3 or lead-out line C3 controls the light-emitting diode 541 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 is carried out by the rated current setting amplifier circuit composed of the potentiometer W1, the resistor R51 and the operational amplifier I15. After the setting is amplified, it is compared with the current reference signal of the lead wire E1 for the first time through the operational amplifier I16. 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 operating current output by the operational amplifier I15 The signal charges the electrolytic capacitor C05 inversely through the resistor R27, diode D34 and diode D35. The voltage signal on the electrolytic capacitor C05 is compared with the current reference signal of the lead wire E1 and lead wire E2 through the operational amplifier I18 for the second time. When working After the 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. It 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. general-purpose protector analog integrated circuit, comprise that three phase rectifier synthesizes four output operational amplifier circuit, the disconnected phase of phase-splitting memory external control type and unbalance protection of three-phase current circuit, it is two that than dual control, oneself opens overload protecting circuit, the two feedback heat of level pressure and electric capacity memory overload protecting circuit, zero dimension is held and is started underload protective circuit while keeping away, zero-sequenceprotection circuit, automatic delayed dual control reset circuit, power capacitor capacity or operating current are at line detection circuit, move/stop recognition control circuit, operation indicating circuit twinkling, it is characterized in that general-purpose protector analog integrated circuit, that motor protecting circuit and pump class protective circuit are unified to the general protective circuit unit of composition with air compressor machine protective circuit and power capacitor protective circuit, unified current reference signal, select the element circuit needing to form the protector of difference in functionality, together with the element of resistance in circuit and diode and operational amplifier, adopt microelectronics integrated technique to be produced in integrated general-purpose protector analog integrated circuit, with the wiring that lead-out wire need to be connected with external circuit, be drawn out to integrated circuit outside, form general-purpose protector analog integrated circuit, in integrated circuit, resistance R 1, resistance R 2, the resistance value of resistance R 3 is identical, resistance R 4, resistance R 5, the resistance value of resistance R 6 is identical, resistance R 7, resistance R 8, the resistance value of resistance R 9 is identical, resistance R 10, resistance R 11, the resistance value of resistance R 12 is identical, resistance R 16, resistance R 17, the resistance value of resistance R 18 is identical, resistance R 14, the resistance value of resistance R 15 is identical, the resistance value of resistance R 33 is greater than the resistance value of resistance R 34, the resistance value of resistance R 38 is greater than the resistance value of resistance R 39, the resistance value of resistance R 41 is greater than the resistance value of resistance R 42, the resistance value of resistance R 42 is greater than the resistance value of resistance R 43, positive supply VDD connects lead-out wire V1 and enters integrated circuit, negative supply VCC connects lead-out wire V2 and enters integrated circuit, common port V0 connects lead-out wire V3 and enters integrated circuit, in general-purpose protector analog integrated circuit, the circuit structure of the synthetic four output operational amplifier circuit of three phase rectifier is that three-phase current AC signal converts direct current signal to by three operational amplifiers amplification rectifications respectively, export respectively the current DC signal of three-phase, separately by three operation amplifier follower outputs and connect the current signal of the highest phase in synthetic output three-phase together, physical circuit is that three-phase current signal enters integrated circuit by connecting line L01 contact resistance R46 and the lead-out wire A1 of sampling current transformer L1 respectively, connecting line L02 contact resistance R47 and the lead-out wire B1 of current transformer L2 enter integrated circuit, connecting line L03 contact resistance R48 and the lead-out wire C1 of current transformer L3 enter integrated circuit, the other end of the other end of current transformer L1 and resistance R 46 is connected common port V0, the other end of the other end of current transformer L2 and resistance R 47 is connected common port V0, the other end of the other end of current transformer L3 and resistance R 48 is connected common port V0, the positive input terminal of lead-out wire A1 concatenation operation amplifier I1, the positive input terminal of lead-out wire B1 concatenation operation amplifier I2, the positive input terminal of lead-out wire C1 concatenation operation amplifier I3, the negative input end contact resistance R1 of operational amplifier I1 and resistance R 4, the negative input end contact resistance R2 of operational amplifier I2 and resistance R 5, the negative input end contact resistance R3 of operational amplifier I3 and resistance R 6, resistance R 1 is connected common port V0 with the other end of resistance R 2 and resistance R 3, the output of operational amplifier I1 connects the positive pole of diode D1, the output of operational amplifier I2 connects the positive pole of diode D2, the output of operational amplifier I3 connects the positive pole of diode D3, the other end of resistance R 4 connects the negative pole of diode D1 and the positive input terminal of resistance R 7 and resistance R 10 and lead-out wire A2 and operational amplifier I4, the other end of resistance R 5 connects the negative pole of diode D2 and the positive input terminal of resistance R 8 and resistance R 11 and lead-out wire B2 and operational amplifier I5, the other end of resistance R 6 connects the negative pole of diode D3 and the positive input terminal of resistance R 9 and resistance R 12 and lead-out wire C2 and operational amplifier I6, resistance R 7 is connected common port V0 with the other end of resistance R 8 and resistance R 9, the output of operational amplifier I4 connects the positive pole of diode D4, the output of operational amplifier I5 connects the positive pole of diode D5, the output of operational amplifier I6 connects the positive pole of diode D6, the negative pole of the negative pole of the negative pole of the negative input end of the negative input end of the negative input end of operational amplifier I4 and operational amplifier I5 and operational amplifier I6 and diode D4 and diode D5 and diode D6 and resistance R 13 and resistance R 15 and lead-out wire S1 connect, the other end contact resistance R14 of resistance R 15 and the negative input end of operational amplifier I7, the positive input terminal of operational amplifier I7 connects common port V0, output and the lead-out wire S2 of the other end concatenation operation amplifier I7 of resistance R 14, lead-out wire A1 is A phase current signal input, lead-out wire B1 is B phase current signal input, lead-out wire C1 is C phase current signal input, lead-out wire A2 is that output is amplified in the rectification of A phase current signal, lead-out wire B2 is that output is amplified in the rectification of B phase current signal, lead-out wire C2 is that output is amplified in the rectification of C phase current signal, lead-out wire A2 is at the outside electrolytic capacitor C01 positive pole that connects of integrated circuit, lead-out wire B2 is at the outside electrolytic capacitor C02 positive pole that connects of integrated circuit, lead-out wire C2 is at the outside electrolytic capacitor C03 positive pole that connects of integrated circuit, electrolytic capacitor C01 negative pole is connected common port V0 with electrolytic capacitor C02 negative pole with electrolytic capacitor C03 negative pole, lead-out wire S1 is the highest phase operating current positive signal output of synthetic output, lead-out wire S2 is the highest phase operating current negative signal output of synthetic output, for outside other defencive function that connects of integrated circuit, the current transformer L1 of integrated circuit outside, current transformer L2, current transformer L3 performance is identical, resistance R 46, resistance R 47, the resistance value of resistance R 48 is identical, electrolytic capacitor C01, electrolytic capacitor C02, the capacity of electrolytic capacitor C03 is identical.

2. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that the disconnected phase of phase-splitting memory external control type and unbalance protection of three-phase current circuit in general-purpose protector analog integrated circuit, by three operational amplifiers, form respectively three-phase three comparison circuits, three-phase current signal is relatively determined error protection with contrast signal respectively, contrast signal synthetic current signal dividing potential drop of exporting the highest phase in three-phase in the synthetic four output operational amplifier circuit of three phase rectifier forms, contrast signal is subject to rated current external control, physical circuit is that resistance R 13 one end connect lead-out wire S1, the negative input end of the other end concatenation operation amplifier I8 of resistance R 13 and the negative input end of operational amplifier I9 and the negative input end of operational amplifier I10 and lead-out wire E4, one end of resistance R 10 connects lead-out wire A2, positive input terminal and diode D22 negative pole and the resistance R 16 of the other end concatenation operation amplifier I8 of resistance R 10, it is anodal that the other end of resistance R 16 connects diode D16, output and diode D10 negative pole and the diode D29 negative pole of diode D16 negative pole concatenation operation amplifier I8, the anodal lead-out wire A3 that connects of diode D10, one end of resistance R 11 connects lead-out wire B2, positive input terminal and diode D23 negative pole and the resistance R 17 of the other end concatenation operation amplifier I9 of resistance R 11, it is anodal that the other end of resistance R 17 connects diode D17, output and diode D11 negative pole and the diode D30 negative pole of diode D17 negative pole concatenation operation amplifier I9, the anodal lead-out wire B3 that connects of diode D11, one end of resistance R 12 connects lead-out wire C2, positive input terminal and diode D24 negative pole and the resistance R 18 of the other end concatenation operation amplifier I10 of resistance R 12, it is anodal that the other end of resistance R 18 connects diode D18, output and diode D12 negative pole and the diode D31 negative pole of diode D18 negative pole concatenation operation amplifier I10, the anodal lead-out wire C3 that connects of diode D12, lead-out wire E4 is the tie point of mutually disconnected and unbalance protection of three-phase current contrast signal, lead-out wire E4 contact resistance R49 obtains mutually disconnected and unbalance protection of three-phase current contrast signal, the other end of resistance R 49 connects common port V0, when lead-out wire E4 is connected lead-out wire K2 by diode D51 with resistance R 55, disconnected mutually and unbalance protection of three-phase current is controlled when operating current is greater than rated current setting, shields, output control terminal when lead-out wire A3 is the disconnected phase of A phase current or imbalance, output control terminal when lead-out wire B3 is the disconnected phase of B phase current or imbalance, output control terminal when lead-out wire C3 is the disconnected phase of C phase current or imbalance, lead-out wire A3 connecting luminous diode D41 negative pole, lead-out wire B3 connecting luminous diode D42 negative pole, lead-out wire C3 connecting luminous diode D43 negative pole, the negative pole of the anodal and light-emitting diode D42 positive pole of light-emitting diode D41 contact resistance R69 and voltage stabilizing didoe D59 together with light-emitting diode D43 positive pole, the anodal contact resistance R70 of voltage stabilizing didoe D59 and the base stage of triode BG, the other end of resistance R 69 connects positive supply VDD and diode D55 negative pole and relay J, the other end of relay J connects the collector electrode of diode D55 positive pole and triode BG, the other end of resistance R 70 connects the emitter of negative supply VCC and triode BG.

3. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that in general-purpose protector analog integrated circuit that two is that operating current is opened inverse time-lag protection while surpassing rated current setting automatically than dual control from opening overload protecting circuit, the highest phase operating current of synthetic output negative signal connects the resistance R 51 of the outside overload protection initialization circuit of integrated circuit by lead-out wire S2, resistance R 51 other ends connect potentiometer W1 fixed end and sliding end and lead-out wire G2, another fixed end of potentiometer W1 connects lead-out wire G1, the negative input end of lead-out wire G2 concatenation operation amplifier I15, the positive input terminal of operational amplifier I15 connects common port V0, the output of lead-out wire G1 concatenation operation amplifier I15 and resistance R 25 and resistance R 32 and resistance R 0, the positive input terminal of the other end concatenation operation amplifier I16 of resistance R 25 and resistance R 26 and resistance R 27 and lead-out wire G4, the another end of resistance R 26 connects common port V0, the negative input end contact resistance R33 of operational amplifier I16 and lead-out wire E1, the output of operational amplifier I16 connects negative pole and the lead-out wire K2 of diode D33, the other end of resistance R 27 connects the positive pole of diode D34, the negative pole of diode D34 connects the positive pole of diode D35, the negative pole of diode D35 connects positive pole and the negative pole of diode D37 and negative input end and the lead-out wire G3 of resistance R 28 and resistance R 29 and operational amplifier I17 of diode D36, the other end of resistance R 28 connects the positive pole of diode D33, the positive input terminal of operational amplifier I17 connects common port V0, the negative pole of diode D36 connects positive supply VDD, the output of operational amplifier I17 connects the positive pole of diode D37, the other end of resistance R 29 connects lead-out wire G5, lead-out wire G5 is at the outside lead-out wire G6 that connects of integrated circuit, lead-out wire G6 is at IC interior contact resistance R30, the negative input end of the other end concatenation operation amplifier I18 of resistance R 30, the positive input terminal contact resistance R31 of operational amplifier I18 and the negative pole of diode D19 and lead-out wire E2, resistance R 31 other ends connect the positive pole of diode D13, the output of operational amplifier I18 connects negative pole and the negative pole of diode D26 and the negative pole of diode D7 of diode D13, the positive pole of diode D7 connects lead-out wire G7, output control terminal when lead-out wire G7 is current overload, lead-out wire G7 connecting luminous diode D45 negative pole, the negative pole of the anodal contact resistance R69 of light-emitting diode D45 and voltage stabilizing didoe D59, the anodal contact resistance R70 of voltage stabilizing didoe D59 and the base stage of triode BG, the other end of resistance R 69 connects positive supply VDD and diode D55 negative pole and relay J, the other end of relay J connects the collector electrode of diode D55 positive pole and triode BG, the other end of resistance R 70 connects the emitter of negative supply VCC and triode BG, lead-out wire E2 is overcurrent protection reference signal, lead-out wire E2 connects voltage stabilizing didoe D61 negative pole and the resistance R 56 of lead-out wire E1 and base Huaihe River signal source through resistance R 66, the other end of resistance R 56 connects positive supply VDD, the anodal common port V0 that connects of voltage stabilizing didoe D61.

4. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that in general-purpose protector analog integrated circuit, the two feedback heat of level pressure and electric capacity memory overload protecting circuits are that the highest phase operating current negative signal of synthetic output connects the resistance R 51 of the outside overload protection initialization circuit of integrated circuit by lead-out wire S2, resistance R 51 other ends connect potentiometer W1 fixed end and sliding end and lead-out wire G2, potentiometer W1 another fixed end contact resistance R55 and lead-out wire G1, the output of lead-out wire G1 concatenation operation amplifier I15, the negative input end of lead-out wire G2 concatenation operation amplifier I15, the positive input terminal of operational amplifier I15 connects common port V0, the other end contact resistance R54 of non-essential resistance R55 and lead-out wire Q3, resistance R 54 other ends connect common port V0, the positive input terminal of lead-out wire Q3 concatenation operation amplifier I13, the negative input end of operational amplifier I13 connects lead-out wire Q2, the output of operational amplifier I13 connects lead-out wire Q1, lead-out wire Q1 connects non-essential resistance R60 and resistance R 61, the other end contact resistance R62 of resistance R 61 and the negative pole of voltage stabilizing didoe D60, the negative pole of the other end contact resistance R63 of resistance R 62 and resistance R 64 and diode D57, the other end of resistance R 64 connects positive pole and the common port V0 of voltage stabilizing didoe D60, the other end of resistance R 63 connects the positive pole of diode D57 and the negative pole of electrolytic capacitor C09 is connected lead-out wire Q2 again with resistance R 65, resistance R 65 other ends connect common port V0, resistance R 60 other ends connect the positive pole of diode D50, the positive pole that the negative pole of diode D50 connects electrolytic capacitor C09 is connected lead-out wire G6 again with resistance R 59, resistance R 59 other ends connect common port V0, lead-out wire G6 connects internal resistance R30, the negative input end of the other end concatenation operation amplifier I18 of resistance R 30, the positive input terminal contact resistance R31 of operational amplifier I18 and lead-out wire E2, resistance R 31 other ends connect the positive pole of diode D13, the output of operational amplifier I18 connects the negative pole of diode D13 and the negative pole of diode D7, the positive pole of diode D7 connects lead-out wire G7, lead-out wire E2 connects non-essential resistance R68 and resistance R 74, resistance R 68 other ends connect common port V0, resistance R 74 other ends connect positive supply VDD, the negative pole of lead-out wire G7 connecting luminous diode D45, the anodal contact resistance R69 of light-emitting diode D45 and the negative pole of voltage stabilizing didoe D59, the anodal contact resistance R70 of voltage stabilizing didoe D59 and the base stage of triode BG, the other end of resistance R 69 connects positive supply VDD and diode D55 negative pole and relay J, the other end of relay J connects the collector electrode of diode D55 positive pole and triode BG, the other end of resistance R 70 connects the emitter of negative supply VCC and triode BG.

5. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that zero dimension in general-purpose protector analog integrated circuit hold starting while keeping away underload protective circuit structure by the potentiometer of operational amplifier and integrated circuit outside, form underload initialization circuit, with operational amplifier, I13 amplifies current settings, with operational amplifier I14, operating current and reference signal are compared and enlarged to control, while keeping away with operational amplifier I21 starting, control, when starting keeps away, in process, underload protection is inoperative, during stopped status, circuit is held and is avoided misoperation in zero dimension, the highest phase operating current of synthetic output negative signal connects the resistance R 52 of the outside underload protection initialization circuit of integrated circuit by lead-out wire S2, resistance R 52 other ends connect potentiometer W2 fixed end and sliding end and lead-out wire Q2, another fixed end of potentiometer W2 connects lead-out wire Q1, the negative input end of lead-out wire Q2 concatenation operation amplifier I13, the positive input terminal of operational amplifier I13 connects lead-out wire Q3, lead-out wire Q3 is connected to the resistance R 54 of integrated circuit outside, the other end of resistance R 54 connects common port V0, output and the resistance R 21 of lead-out wire Q1 concatenation operation amplifier I13, the positive input terminal of other end concatenation operation amplifier I14 of resistance R 21 and the negative pole of resistance R 23 and diode D20, the other end of resistance R 23 connects the positive pole of diode D14, the negative input end of operational amplifier I14 connects the negative pole of diode D25 and positive pole and the lead-out wire E3 of diode D32, the positive pole of diode D25 connects common port V0, the negative pole contact resistance R24 of diode D32, the other end of resistance R 24 connects output and the lead-out wire Y2 that starts the operational amplifier I21 of circuit while keeping away, the negative pole of the output of I14 and the negative pole of diode D27 and diode D8 is put in the negative pole concatenation operation of diode D14, the positive pole of diode D8 connects lead-out wire Q4, lead-out wire E3 is the underload protecting group calibration signal of electric current, lead-out wire E3 connects integrated circuit non-essential resistance R67 and resistance R 72, the other end of resistance R 67 connects negative pole and the resistance R 56 of reference circuit voltage-stabiliser tube D61, the other end of resistance R 56 connects positive supply VDD, the positive pole of voltage-stabiliser tube D61 connects common port V0, the other end of resistance R 72 connects positive pole and the electrolytic capacitor C10 positive pole of diode D53, electrolytic capacitor C10 negative pole connects negative supply VCC, the negative pole of diode D53 connects electrolytic capacitor C07 positive pole and lead-out wire K1, electrolytic capacitor C07 negative pole connects potentiometer W4 fixed end and sliding end and lead-out wire Y1, another fixed end of potentiometer W4 connects negative supply VCC, the negative input end of lead-out wire Y1 concatenation operation amplifier I21, the positive input terminal contact resistance R38 of operational amplifier I21 and resistance R 39, the other end of resistance R 38 connects positive supply VDD, the other end of resistance R 39 connects negative supply VCC, the negative pole of lead-out wire Q4 connecting luminous diode D46, the anodal contact resistance R69 of light-emitting diode D46 and the negative pole of voltage stabilizing didoe D59, the anodal contact resistance R70 of voltage stabilizing didoe D59 and the base stage of triode BG, the other end of resistance R 69 connects positive supply VDD and diode D55 negative pole and relay J, the other end of relay J connects the collector electrode of diode D55 positive pole and triode BG, the other end of resistance R 70 connects the emitter of negative supply VCC and triode BG.

6. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that zero-sequenceprotection circuit in general-purpose protector analog integrated circuit, zero sequence current mutual inductor L0 one end contact resistance R58, the zero sequence current mutual inductor L0 other end connects common port V0, the other end contact resistance R76 of resistance R 58 and lead-out wire H2, the other end of resistance R 76 connects lead-out wire H1, the negative input end of lead-out wire H2 concatenation operation amplifier I11, the positive input terminal of operational amplifier I11 connects common port V0, it is anodal that the output of operational amplifier I11 connects diode D0, lead-out wire H1 connects diode D0 negative pole and resistance R 22, the negative input end of the other end concatenation operation amplifier I12 of resistance R 22, the positive input terminal of operational amplifier I12 connects negative pole and resistance R 19 and the resistance R 20 of diode D21, the other end of resistance R 19 connects negative supply VCC, the other end of resistance R 20 connects the negative pole of diode D15, the output of operational amplifier I12 connects positive pole and the negative pole of diode D28 and the negative pole of D9 of diode D15, the positive pole of D9 connects lead-out wire H3, the negative pole of lead-out wire H3 connecting luminous diode D47, the anodal contact resistance R69 of light-emitting diode D47 and the negative pole of voltage stabilizing didoe D59, the anodal contact resistance R70 of voltage stabilizing didoe D59 and the base stage of triode BG, the other end of resistance R 69 connects positive supply VDD and diode D55 negative pole and relay J, the other end of relay J connects the collector electrode of diode D55 positive pole and triode BG, the other end of resistance R 70 connects the emitter of negative supply VCC and triode BG.

7. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that automatic delayed dual control reset circuit in general-purpose protector analog integrated circuit, each road protection output connects to form OR circuit and controls reset delay circuit, reset delay circuit output end connects simultaneously controls each road protection output reset, the output of the negative pole concatenation operation amplifier I18 of diode D26, the output of the negative pole concatenation operation amplifier I14 of diode D27, the output of the negative pole concatenation operation amplifier I12 of diode D28, the output of the negative pole concatenation operation amplifier I8 of diode D29, the output of the negative pole concatenation operation amplifier I9 of diode D30, the output of the negative pole concatenation operation amplifier I10 of diode D31, contact resistance R41 and resistance R 43 together with the positive pole of the positive pole of the positive pole of diode D26 and diode D27 and the positive pole of diode D28 and the positive pole of diode D29 and the positive pole of diode D30 and diode D31, the positive input terminal of other end concatenation operation amplifier I22 of resistance R 43 and positive pole and the resistance R 42 of diode D40, the negative pole contact resistance R44 of diode D40 and resistance R 45, the other end of resistance R 45 connects common port V0, the other end of resistance R 42 and resistance R 44 is connected positive supply VDD, negative input end and the lead-out wire Z of the other end concatenation operation amplifier I22 of resistance R 41, the positive input terminal of the negative pole concatenation operation amplifier I18 of diode D19, the positive input terminal of the negative pole concatenation operation amplifier I14 of diode D20, the positive input terminal of the negative pole concatenation operation amplifier I12 of diode D21, the positive input terminal of the negative pole concatenation operation amplifier I8 of diode D22, the positive input terminal of the negative pole concatenation operation amplifier I9 of diode D23, the positive input terminal of the negative pole concatenation operation amplifier I10 of diode D24, contact resistance R40 and lead-out wire F together with the positive pole of the positive pole of the positive pole of diode D19 and diode D20 and the positive pole of diode D21 and the positive pole of diode D22 and the positive pole of diode D23 and diode D24, the output of operational amplifier I22 and resistance R 40, lead-out wire F resets and connects the negative pole of button FW and diode D49 in the outside connection of integrated circuit, reset meets positive pole and the positive supply VDD of the other end connection electrolytic capacitor C04 of button FW, the positive pole of diode D49 connects negative pole and the resistance R 50 of electrolytic capacitor C04, the other end of resistance R 50 connects negative supply VCC, lead-out wire Z is at the outside negative pole of electrolytic capacitor C06 and the negative pole of diode D52 of connecting of integrated circuit, the positive pole of electrolytic capacitor C06 connects positive supply VDD, the positive pole of diode D52 connects lead-out wire K1, lead-out wire F is outside power-on-reset, hand-reset and inner automatically reset total connecting line.

8. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that moving indicating circuit twinkling in general-purpose protector analog integrated circuit, after operating current is higher than certain setting, run indicator flicker frequency is directly proportional to operating current, when shutdown or disorderly closedown machine, run indicator also stops flicker, operational amplifier I20 positive input terminal contact resistance R35 and resistance R 36, the other end of resistance R 35 connects positive pole and the common port V0 of diode D38, operational amplifier I20 negative input end connects the negative pole of diode D38 and positive pole and resistance R 0 and the lead-out wire X1 of diode D39, the negative pole contact resistance R37 of diode D39, other end concatenation operation amplifier I20 output and the lead-out wire X2 of the other end of resistance R 37 and resistance R 36, lead-out wire X2 connects the resistance R 57 of integrated circuit outside, the positive pole of the other end connecting luminous diode D48 of resistance R 57, the negative pole of light-emitting diode D48 connects common port V0, lead-out wire X1 connects the diode D54 positive pole of integrated circuit outside and the positive pole of electrolytic capacitor C08, the negative pole of electrolytic capacitor C08 connects common port V0, negative pole and the resistance R 69 of the positive pole of negative pole connecting luminous diode D41 of diode D54 and the positive pole of the positive pole of light-emitting diode D42 and light-emitting diode D43 and the positive pole of the positive pole of light-emitting diode D45 and light-emitting diode D46 and the positive pole of light-emitting diode D47 and voltage stabilizing didoe D59, the anodal contact resistance R70 of voltage stabilizing didoe D59 and the base stage of triode BG, the other end of resistance R 69 connects positive supply VDD and diode D55 negative pole and relay J, the other end of relay J connects the collector electrode of diode D55 positive pole and triode BG, the other end of resistance R 70 connects the emitter of negative supply VCC and triode BG.

9. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that in general-purpose protector analog integrated circuit that power capacitor capacity or operating current are at line detection circuit, operating current negative signal connects integrated circuit external circuit resistance R 53 by lead-out wire S2, the other end of resistance R 53 connects potentiometer W3 and lead-out wire H2, the other end of potentiometer W3 connects external digital display terminal CS and lead-out wire H1 enters integrated circuit, the negative input end of lead-out wire H2 concatenation operation amplifier I11, the positive input terminal of operational amplifier I11 connects common port V0, it is anodal that the output of operational amplifier I11 connects diode D0, lead-out wire H1 connects diode D0 negative pole and resistance R 22, between lead-out wire H1 and common port V0, it is the signal output part that detects online power capacitor capacity or operating current, connect external digital display terminal CS.

10. according to right, want 1 said general-purpose protector analog integrated circuit, it is characterized in that moving/stop recognition control circuit in general-purpose protector analog integrated circuit, operational amplifier I19 positive input terminal contact resistance R32, the other end contact resistance R0 of resistance R 32 and operational amplifier I15 output and lead-out wire G1, operational amplifier I19 negative input end contact resistance R33 and resistance R 34, other end concatenation operation amplifier I16 negative input end and the lead-out wire E1 of resistance R 33, the other end of resistance R 34 connects common port V0, operational amplifier I19 output connects lead-out wire K1, during the protection of pump class, lead-out wire K1 is at the outside positive pole of electrolytic capacitor C07 and the negative pole of diode D53 of connecting of integrated circuit, during power capacitor protection, lead-out wire K1 is at the outside negative pole of diode D56 and the positive pole of diode D52 of connecting of integrated circuit.