CN216774639U - Three-phase electric combined device - Google Patents
Three-phase electric combined device Download PDFInfo
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- CN216774639U CN216774639U CN202122576792.5U CN202122576792U CN216774639U CN 216774639 U CN216774639 U CN 216774639U CN 202122576792 U CN202122576792 U CN 202122576792U CN 216774639 U CN216774639 U CN 216774639U
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Abstract
The utility model discloses a three-phase electric combination device, which comprises a motor and an electronic control device, wherein the electronic control device comprises a rectifying circuit, a regulating circuit, a current acquisition and control circuit and a direct current stabilized voltage supply circuit; the input end of the direct current stabilized power supply circuit is connected with a rotor connecting end of the motor in an induction way, and the output end of the direct current stabilized power supply circuit is connected with the power supply end of the current acquisition and control circuit; the input end of the current acquisition and control circuit is connected with the other rotor connecting end of the motor in an induction manner, and the output end of the current acquisition and control circuit is connected with the control end of the regulating circuit. The utility model has simple structure, and realizes the functions of saving energy, reducing consumption and adjusting the self rotating speed of the motor on the basis of realizing the low-current soft start of the motor.
Description
Technical Field
The utility model relates to the technical field of motor starting, in particular to a three-phase electric combination device.
Background
In a traditional three-phase wound motor, three outgoing lines of a rotor are led out through three independent metal slip rings fixed at the end of the rotor, and three independent electric brush frames and three electric brushes are arranged at the end of a stator of the motor. Three frequency-sensitive reactance starting devices are required to be connected into a rotor outgoing line before the motor is started and operated, and when the motor is started, three lead heads of a rotor coil are in short circuit connection through an alternating current contactor in a motor starting cabinet, so that the motor enters a rated rotating speed working state. The scheme has the defects of complex structure and low power utilization efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model provides a three-phase electric combined device, which aims to: the soft start of the motor is realized by arranging the electronic control device, and the functions of saving energy, reducing consumption and adjusting the rotating speed of the motor are realized simultaneously.
The technical scheme of the utility model is as follows:
a three-phase electric combination device comprises a motor and an electronic control device, wherein a stator connecting end of the motor is connected with a three-phase alternating current power supply end, three rotor connecting ends of the motor are connected with the electronic control device, the electronic control device comprises a rectifying circuit, a regulating circuit, a current collecting and controlling circuit and a direct current stabilized voltage power supply circuit, an input end of the rectifying circuit is connected with the three rotor connecting ends of the motor, a positive output end of the rectifying circuit is connected with a first voltage end VB of the regulating circuit, and a negative output end of the rectifying circuit is connected with a second voltage end VO of the regulating circuit; the input end of the direct current stabilized power supply circuit is connected with the first rotor connecting end of the motor in an induction mode, the positive output end of the direct current stabilized power supply circuit is connected with the positive power connecting end of the current collecting and controlling circuit, the negative output end of the direct current stabilized power supply circuit is connected with the negative power connecting end of the current collecting and controlling circuit, the input end of the current collecting and controlling circuit is connected with the second rotor connecting end of the motor in an induction mode, the first output end of the current collecting and controlling circuit is connected with the control end of the regulating circuit, and the second output end of the current collecting and controlling circuit is connected with the first voltage end VB of the regulating circuit.
Further, the current collecting and controlling circuit includes a rotor current signal collector LB2, a rectifier bridge Q2, an operational amplifier module IC1 and a photoelectric coupler GOU1, the rotor current signal collector LB2 is used as an input end of the current collecting and controlling circuit and is inductively connected to a second rotor connecting end of the motor, two output ends of the rotor current signal collector LB2 are respectively connected to two bridge arms of the rectifier bridge Q2, a resistor R8 is connected between a positive output end and a negative output end of the rectifier bridge Q2, a positive output end of the rectifier bridge Q2 is connected to a first positive input end of the operational amplifier module IC1 through a resistor R7, a connection point between the resistor R7 and a first positive input end of the operational amplifier module IC1 is connected to a negative output end of the rectifier bridge Q2 through a capacitor C2, a negative output end of the rectifier bridge Q2 is further connected to a negative terminal of the current collecting and controlling circuit, a first negative input end of the operational amplifier module IC1 is connected to a first negative terminal of the operational amplifier module IC1 through a resistor R11 The first output end of the operational amplification module IC1 is connected with the positive input end of the photoelectric coupler GOU1 through a resistor R12, the first output end of the operational amplification module IC1 is also connected with the first voltage end VB of the regulating circuit through a diode D8, the negative input end of the photoelectric coupler GOU1 is connected with the negative power terminal of the current collection and control circuit, and the first output end and the second output end of the photoelectric coupler GOU1 are respectively connected with the first output end and the second output end of the current collection and control circuit.
The VCC terminal of the operational amplification module IC1 is connected with the positive power terminal of the current collection and control circuit, and the GND terminal of the operational amplification module IC1 is connected with the negative power terminal of the current collection and control circuit.
Further, the current collecting and controlling circuit further comprises an external control remote controller, and the external control remote controller is connected between the first positive input end of the operational amplification module IC1 and the power supply negative terminal of the current collecting and controlling circuit.
Furthermore, the regulating circuit comprises a transistor FK1, a base of a transistor FK1 is connected to a control terminal of the regulating circuit, a collector of a transistor FK1 is connected to a first voltage terminal VB of the regulating circuit, an emitter of a transistor FK1 is connected to a second voltage terminal VO of the regulating circuit, a resistor R3 is connected between the base and the collector of a transistor FK1, a resistor R2 is connected between the base and the emitter of a transistor FK1, a resistor R1 is connected between the collector and the emitter of a transistor FK1, and the second voltage terminal VO of the regulating circuit is connected to a negative power terminal of the current collecting and controlling circuit.
Further, the dc regulated power supply circuit includes a voltage transformer LB1 and a rectifier bridge Q1, the voltage transformer LB1 is used as an input end of the dc regulated power supply circuit and is inductively connected to a first rotor connection end of the motor, two output ends of the voltage transformer LB1 are respectively connected to two bridge arms of the rectifier bridge Q1, a positive output end of the rectifier bridge Q1 is connected to a positive output end of the dc regulated power supply circuit, a negative output end of the rectifier bridge Q1 is connected to a negative output end of the dc regulated power supply circuit, a capacitor C1 and a zener diode WD1 connected in parallel are arranged between the positive and negative output ends of the rectifier bridge Q1, and a current conduction direction of the zener diode WD1 is from the negative output end of the rectifier bridge Q1 to the positive output end of the rectifier bridge Q1.
Further, the rectifier circuit comprises a three-phase rectifier bridge, three bridge arms of the three-phase rectifier bridge are respectively connected with three rotor connecting ends of the motor, a positive output end of the three-phase rectifier bridge is connected with a first voltage end VB of the regulating circuit, and a negative output end of the three-phase rectifier bridge is connected with a second voltage end VO of the regulating circuit.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the device has a simple structure, a metal conducting ring, a brush holder and three brushes are omitted, the rotor end of the motor is not provided with an external lead terminal, and an electronic control device fixed at the rotor rotating shaft end is additionally arranged, wherein a rectifying circuit rectifies the rotor induced electromotive force of the motor into direct current electromotive force, and a current collecting and controlling circuit induces the change of the rotor current of the motor, so that the voltage of a regulating circuit is controlled, the low-current soft start function of the motor is realized, and the power saving and consumption reducing performance is improved;
(2) the current acquisition and control circuit is externally connected with a direct current voltage signal, so that the purpose of adjusting the rotating speed of the motor according to the instruction is realized;
(3) the direct current stabilized voltage power supply circuit provides stable voltage for the current acquisition and control circuit, and the stable operation of the device is ensured.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical scheme of the utility model is explained in detail in the following with the accompanying drawings:
as shown in fig. 1, a three-phase electric combination device includes a motor 1 and an electronic control device 2, a stator connection end of the motor 1 is connected to a three-phase ac power source end, three rotor connection ends (three wire ends JD1, JD2, JD3 of a three-phase induction coil) of the motor 1 are connected to the electronic control device 2, in this embodiment, the specification of the motor 1 is 380/200KW, and three wire outlets of a three-phase electromagnetic coil at the stator end are respectively connected to a 380V ac power source A, B, C.
The electronic control device 2 comprises a rectifying circuit 2-1, a regulating circuit 2-2, a current collecting and controlling circuit 2-3 and a direct current stabilized voltage power supply circuit 2-4, wherein the input end of the rectifying circuit 2-1 is connected with the three rotor connecting ends of the motor 1, the positive output end of the rectifying circuit 2-1 is connected with the first voltage end VB of the regulating circuit 2-2, and the negative output end of the rectifying circuit 2-1 is connected with the second voltage end VO of the regulating circuit 2-2; the input end of the direct current stabilized power supply circuit 2-4 is connected with a first rotor connecting end of the motor 1 in an induction mode, the positive output end of the direct current stabilized power supply circuit 2-4 is connected with a positive power terminal of the current collecting and controlling circuit 2-3, the negative output end of the direct current stabilized power supply circuit 2-4 is connected with a negative power terminal of the current collecting and controlling circuit 2-3, the input end of the current collecting and controlling circuit 2-3 is connected with a second rotor connecting end of the motor 1 in an induction mode, the first output end of the current collecting and controlling circuit 2-3 is connected with a control end of the regulating circuit 2-2, and the second output end of the current collecting and controlling circuit 2-3 is connected with a first voltage end VB of the regulating circuit 2-2.
Specifically, the rectification circuit 2-1 comprises a three-phase rectifier bridge, and the specifications of rectifier diodes in the three-phase rectifier bridge are all 1600V/500A. Three bridge arms of the three-phase rectifier bridge are respectively connected with three rotor connecting ends of the motor 1, a positive output end of the three-phase rectifier bridge is connected with a first voltage end VB of the regulating circuit 2-2, and a negative output end of the three-phase rectifier bridge is connected with a second voltage end VO of the regulating circuit 2-2. The rectifying circuit 2-1 is used for rectifying the rotor induced potential energy in the machine body M into direct current potential energy.
The regulating circuit 2-2 comprises a triode FK1, the base of the triode FK1 is connected with the control end of the regulating circuit 2-2, the collector of the triode FK1 is connected with the first voltage end VB of the regulating circuit 2-2, the emitter of the triode FK1 is connected with the second voltage end VO of the regulating circuit 2-2, a resistor R3 is connected between the base and the collector of the triode FK1, a resistor R2 is connected between the base and the emitter of the triode FK1, a resistor R1 is connected between the collector and the emitter of the triode FK1, and the second voltage end VO of the regulating circuit 2-2 is connected with the negative power terminal of the current collecting and controlling circuit 2-3. The specification of the resistor R1 is 10KW/0.8 omega, the specification of the resistor R2 is 0.5W/2K omega, the specification of the resistor R3 is 0.5W/100K omega, and the triode FK1 is a high-power IGBT triode module FZ2400R12HP 4. The regulating circuit 2-2 is used for controlling the starting voltage and current of the motor 1 and is controlled by the current collecting and controlling circuit 2-3.
The current collecting and controlling circuit 2-3 comprises a rotor current signal collector LB2, a rectifier bridge Q2, an operational amplifier module IC1 and a photoelectric coupler GOU1, the photoelectric coupler GOU1 comprises a light emitting diode and a photosensitive resistor, the rotor current signal collector LB2 is used as an input end of the current collecting and controlling circuit 2-3 and is inductively connected with a second rotor connecting end (JD 3) of the motor 1, two output ends of the rotor current signal collector LB2 are respectively connected with two bridge arms of the rectifier bridge Q2, a resistor R8 is connected between a positive output end and a negative output end of the rectifier bridge Q2, a positive output end of the rectifier bridge Q2 is connected with a first positive input end (a 10 pin and a 12 pin) of the operational amplifier module IC1 through a resistor R7, a connection point between the resistor R7 and the first positive input end of the operational amplifier module IC1 is connected with the negative output end of the rectifier bridge Q2 through a capacitor C2, the negative output end of the rectifier bridge Q2 is further connected to the negative power connection end of the current collection and control circuit 2-3, the first negative input end (pin 9 and pin 13) of the operational amplifier module IC1 is connected to the first output end of the operational amplifier module IC1 through a resistor R11, the first output end (pin 8 and pin 14) of the operational amplifier module IC1 is connected to the positive input end of the photoelectric coupler GOU1 through a resistor R12, the first output end of the operational amplifier module IC1 is further connected to the first voltage end VB of the regulator circuit 2-2 through a diode D8, the negative input end of the photoelectric coupler GOU1 is connected with the negative power terminal of the current collecting and controlling circuit 2-3, and the first output end and the second output end of the photoelectric coupler GOU1 are respectively connected with the first output end and the second output end of the current collecting and controlling circuit 2-3; the VCC terminal (pin 4) of the operational amplification module IC1 is connected with the positive power terminal of the current collection and control circuit 2-3, and the GND terminal (pin 11) of the operational amplification module IC1 is connected with the negative power terminal of the current collection and control circuit 2-3. The specification of the current signal collector LB2 is 500/1 current transformer, the specification of the rectifier bridge Q2 is 500V/5A rectifier bridge, the specifications of the resistors R7, R8, R11 and R12 are 0.5W/10K omega, 5W/1 omega, 0.5W/30K omega and 1W/1.5K omega respectively, the specification of the diode D8 is 1000V/1A, and the model of the integrated circuit IC1 is LM 2902.
A second positive input end (pin 3 and pin 5) of the operational amplification module IC1 is connected with a positive power connection terminal of the current acquisition and control circuit 2-3 through a resistor R4, and a second positive input end of the operational amplification module IC1 is also connected to the ground through a resistor R5 and a capacitor C3 which are connected in parallel; a second negative input end (pin 2 and pin 6) of the operational amplification module IC1 is connected with a positive power terminal of the current acquisition and control circuit 2-3 through a resistor R9, and a second negative input end of the operational amplification module IC1 is also connected with a negative power terminal of the current acquisition and control circuit 2-3 through a resistor R10; the second output end (pin 1 and pin 7) of the operational amplification module IC1 is connected to the negative power terminal of the current collection and control circuit 2-3 through a diode D7 and a resistor R6 which are connected in series, and the current conducting direction of the diode D7 is the second output end of the operational amplification module IC1 pointed by the resistor R6.
The change of the photoresistance determines the potential difference between VO and VB, and also determines the dynamic change of the current of the circuit body M, and the change of the photoresistance is controlled by the brightness change of a light-emitting diode in the photoelectric coupler GOU 1; the magnitude of the output (pin 8 and pin 14) potential value of the operational amplification module IC1 controls the magnitude of the current value of the light-emitting diode, thereby controlling the brightness of the light-emitting diode; the input of the operational amplification module IC1 is determined by the rotor current signal collector LB2 and the rectifier bridge Q2, i.e. controlled by the rotor current of the motor.
The current collecting and controlling circuit 2-3 further comprises an external control remote controller, and the external control remote controller is connected between the first positive input end of the operational amplification module IC1 and the power supply negative terminal of the current collecting and controlling circuit 2-3.
The direct current stabilized power supply circuit 2-4 is used for supplying power to the current acquisition and control circuit 2-3, and comprises a voltage transformer LB1 and a rectifier bridge Q1, wherein the voltage transformer LB1 is used as the input end of the direct current stabilized power supply circuit 2-4 and is inductively connected with a first rotor connecting end (JD 2) of the motor 1, two output ends of the voltage transformer LB1 are respectively connected with two bridge arms of the rectifier bridge Q1, the positive output end of the rectifier bridge Q1 is connected with the positive output end of the direct current stabilized power supply circuit 2-4, the negative output end of the rectifier bridge Q1 is connected with the negative output end of the direct current stabilized power supply circuit 2-4, a capacitor C1 and a stabilizing diode WD1 which are connected in parallel are arranged between the positive output end and the negative output end of the rectifier bridge Q1, the current conducting direction of the zener diode WD1 is from the negative output terminal of the rectifier bridge Q1 to the positive output terminal of the rectifier bridge Q1. The specification of the voltage transformer LB1 is 12V/1A, the specification of the rectifier bridge Q1 is 500V/1A, the specification of the capacitor C1 is an electrolytic filter capacitor of 25V/10uF, and the specification of the voltage stabilizing diode WD1 is 5W/10V.
The electronic control device 2 arranged in the device is used for controlling the self high-efficiency power utilization, inputting current and outputting power torque under the conditions of reducing the current of the motor and reducing the temperature of the machine body, and has a soft start function, an intelligent high-efficiency power utilization function, an electricity saving and consumption reducing function and a remote control speed regulation function interface. The device can be used for an intelligent high-efficiency three-phase electric combined device with the voltage grade of 380V/660V/1140V/3000V/6000V/10000V/35000V and the power of each layer from 0.6KW to 10000KW in each specification.
The soft start performance of the device is as follows: the regulating circuit 2-2 is used for regulating the potential difference between a first voltage end VB and a second voltage end VO, when the stator of the motor 1M is connected to A, B, C three-phase power supply, the rotor of the motor is simultaneously induced with three-phase potential, the potential is changed into direct current voltage through a rectifying circuit 2-1 and is sent to two ends of V0 and VB in the regulating circuit 2-2, the potential difference between V0 and VB is determined by the potential difference between the collector and the emitter of a triode FK1 in the regulating circuit 2-2, the base of the FK1 is controlled by the ratio of R2 to R3, the controlled voltage is set within the range of 50% -70% of the induced voltage of the rotor by using the amplification principle of a transistor, so that the soft start current value of the rotor is controlled, and the input power current value of the stator of the motor M is indirectly controlled.
The energy saving and consumption reduction performance of the device is as follows: when the motor is started and enters a normal operation state, because electromechanical equipment driven by the motor dynamically changes along with the load, when the load rate dynamically changes, the secondary current of an LB2 current transformer in the current acquisition and control circuit 2-3 correspondingly changes, the secondary current is sent into the photoelectric coupler GOU1 after being processed by an IC1 signal, the signal current of a light emitting diode correspondingly changes, so that the photosensitive resistor correspondingly changes, the resistance value of the photosensitive resistor correspondingly changes the base potential of the FK1 in the regulating circuit 2-2, and the potential difference between the emitter and the pole electrode (VO and VB ends) of the FK1 correspondingly changes along with the load of the motor 1, and the power utilization efficiency of the motor per se is ensured to reach more than 90 percent at any time. The current of the motor 1 is intelligently self-regulated by a method of sensing the current value of the rotor, so that the current in the stator of the motor is always in a high-efficiency power utilization state, and the purposes of reasonably utilizing power, saving energy and reducing consumption are achieved.
The device has the functions of adjusting the rotating speed: a direct current 10V/5mA external control remote control is connected to a positive terminal ten and a negative terminal one in the current collecting and controlling circuit 2-3, so that the potential difference between the terminal ten and the terminal one is changed between 0V and 10V, the output potential value of a pin 8 and a pin 14 of the operational amplifying module IC1 is changed, the resistance value of a photoresistor is changed, the base potential of the triode FK1 is further changed, and the potential difference between the VO and the VB is changed, so that the current of a motor rotor is adjusted to change, and the motor realizes slip speed change.
While the utility model has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. A three-phase electric combined device comprising an electric motor (1), characterized in that: the motor also comprises an electronic control device (2), the stator connecting end of the motor (1) is connected with a three-phase alternating current power supply end, the three rotor connecting ends of the motor (1) are connected with the electronic control device (2), the electronic control device (2) comprises a rectification circuit (2-1), a regulating circuit (2-2), a current acquisition and control circuit (2-3) and a direct current stabilized power supply circuit (2-4), the input end of the rectifying circuit (2-1) is connected with the three rotor connecting ends of the motor (1), the positive output end of the rectifying circuit (2-1) is connected with the first voltage end VB of the regulating circuit (2-2), and the negative output end of the rectifying circuit (2-1) is connected with the second voltage end VO of the regulating circuit (2-2); the input end of the direct current stabilized power supply circuit (2-4) is connected with the first rotor connecting end of the motor (1) in an induction way, the positive output end of the direct current stabilized power supply circuit (2-4) is connected with the positive power connecting end of the current acquisition and control circuit (2-3), the negative output end of the direct current stabilized power supply circuit (2-4) is connected with the negative power connecting end of the current acquisition and control circuit (2-3), the input end of the current acquisition and control circuit (2-3) is connected with the second rotor connecting end of the motor (1) in an induction manner, the first output end of the current acquisition and control circuit (2-3) is connected with the control end of the regulating circuit (2-2), and the second output end of the current acquisition and control circuit (2-3) is connected with the first voltage end VB of the regulating circuit (2-2).
2. A three-phase electric combination as claimed in claim 1, wherein: the current collecting and controlling circuit (2-3) comprises a rotor current signal collector LB2, a rectifier bridge Q2, an operational amplification module IC1 and a photoelectric coupler GOU1, the rotor current signal collector LB2 is used as the input end of the current collecting and controlling circuit (2-3) and is in induction connection with the second rotor connecting end of the motor (1), two output ends of the rotor current signal collector LB2 are respectively connected with two bridge arms of the rectifier bridge Q2, a resistor R8 is connected between the positive output end and the negative output end of the rectifier bridge Q2, the positive output end of the rectifier bridge Q2 is connected with the first positive input end of the operational amplification module IC1 through a resistor R7, the connection point between the resistor R7 and the first positive input end of the operational amplification module IC1 is connected with the negative output end of the rectifier bridge Q2 through a capacitor C2, the negative output end of the rectifier bridge Q2 is also connected with the power supply terminal of the current collecting and controlling circuit (2-3), a first negative input end of the operational amplification module IC1 is connected with a first output end of the operational amplification module IC1 through a resistor R11, a first output end of the operational amplification module IC1 is connected with a positive input end of the photoelectric coupler GOU1 through a resistor R12, the first output end of the operational amplification module IC1 is further connected with a first voltage end VB of the regulating circuit (2-2) through a diode D8, a negative input end of the photoelectric coupler GOU1 is connected with a power supply negative terminal of the current collection and control circuit (2-3), and a first output end and a second output end of the photoelectric coupler GOU1 are respectively connected with a first output end and a second output end of the current collection and control circuit (2-3);
the VCC terminal of the operational amplification module IC1 is connected with the positive power terminal of the current collection and control circuit (2-3), and the GND terminal of the operational amplification module IC1 is connected with the negative power terminal of the current collection and control circuit (2-3).
3. A three-phase electric combination as claimed in claim 2, wherein: the current collecting and controlling circuit (2-3) further comprises an external control remote controller, and the external control remote controller is connected between the first positive input end of the operational amplification module IC1 and the power supply negative terminal of the current collecting and controlling circuit (2-3).
4. A three-phase electric combination as claimed in claim 1, wherein: the regulating circuit (2-2) comprises a triode FK1, the base of the triode FK1 is connected with the control end of the regulating circuit (2-2), the collector of the triode FK1 is connected with the first voltage end VB of the regulating circuit (2-2), the emitter of the triode FK1 is connected with the second voltage end VO of the regulating circuit (2-2), a resistor R3 is connected between the base and the collector of the triode FK1, a resistor R2 is connected between the base and the emitter of the triode FK1, a resistor R1 is connected between the collector and the emitter of the triode FK1, and the second voltage end VO of the regulating circuit (2-2) is connected with the negative power supply terminal of the current collecting and controlling circuit (2-3).
5. A three-phase electric combination as claimed in claim 1, wherein: the direct-current stabilized power supply circuit (2-4) comprises a voltage transformer LB1 and a rectifier bridge Q1, wherein the voltage transformer LB1 is used as an input end of the direct-current stabilized power supply circuit (2-4) and is in induction connection with a first rotor connecting end of the motor (1), two output ends of the voltage transformer LB1 are respectively connected with two bridge arms of a rectifier bridge Q1, a positive output end of the rectifier bridge Q1 is connected with a positive output end of the direct-current stabilized power supply circuit (2-4), a negative output end of the rectifier bridge Q1 is connected with a negative output end of the direct-current stabilized power supply circuit (2-4), a capacitor C1 and a stabilizing diode WD1 which are connected in parallel are arranged between a positive output end and a negative output end of the rectifier bridge Q1, and the current conduction direction of the stabilizing diode WD1 is that the negative output end of the rectifier bridge Q1 points to the positive output end of the rectifier bridge Q1.
6. A three-phase electric combination as claimed in any of claims 1 to 5, characterized in that: the rectifying circuit (2-1) comprises a three-phase rectifying bridge, three bridge arms of the three-phase rectifying bridge are respectively connected with three rotor connecting ends of the motor (1), a positive output end of the three-phase rectifying bridge is connected with a first voltage end VB of the regulating circuit (2-2), and a negative output end of the three-phase rectifying bridge is connected with a second voltage end VO of the regulating circuit (2-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122576792.5U CN216774639U (en) | 2021-10-26 | 2021-10-26 | Three-phase electric combined device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122576792.5U CN216774639U (en) | 2021-10-26 | 2021-10-26 | Three-phase electric combined device |
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| CN216774639U true CN216774639U (en) | 2022-06-17 |
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| CN202122576792.5U Active CN216774639U (en) | 2021-10-26 | 2021-10-26 | Three-phase electric combined device |
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| CN (1) | CN216774639U (en) |
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- 2021-10-26 CN CN202122576792.5U patent/CN216774639U/en active Active
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