Potentiometer, power control circuit, and power control device

Abstract

The present invention proposes a potentiometer, a power control circuit, a device and an application of the power control circuit, and relates to the field of industrial control technology. The power control circuit comprises: a voltage regulating module, which comprises a sliding arm, and the sliding arm is provided with a voltage dividing contact; an interlocking signal control circuit, and the interlocking signal control circuit outputs a forward and reverse control signal according to the voltage polarity between the voltage dividing contact and the sliding arm; a speed regulating switch circuit, and the speed regulating switch circuit adjusts the motor speed according to the voltage value between the voltage dividing contact and the sliding arm, and the operating end can adopt stepless smooth adjustment, and the adjustment is smooth without tiring the wrist; the number of control wires from the operating end to the execution end is compressed, and installation, operation and maintenance are convenient.

Description

Technical Field

[0001] The present invention relates to the field of industrial control technology, and in particular to a potentiometer, a power control circuit, a power control device and the application of the power control circuit. Background Art

[0002] The wound rotor motor changes the induced current flowing through the wound rotor to increase or decrease the motor torque and speed to achieve a relatively smooth power output effect. The cam controller is commonly used in the prior art to control the start, stop, speed regulation, reversing and braking of the small wound rotor motor by connecting and disconnecting the switch contacts.

[0003] In the prior art, the lifting equipment is partially driven by a winding asynchronous motor, and the technical problems are as follows:

[0004] 1. The gear positioning structure of the operating handle makes the wrist tired and the experience poor when operated for a long time; the internal contacts of the controller have slow conversion speed and are easy to burn out.

[0005] 2. The trolley sliding wire includes either the motor power wire and the rotor wire (usually 6 wires), or the contactor control wire (8 wires in this case). It is easy to age due to the use time and the environment, which increases the maintenance workload and accounts for more than 60% of the failure rate. In addition, it can only be used for 6-pole, 8-pole or above slow-speed motors, which seriously affects the running speed and efficiency of the equipment;

[0006] 3. There are many connections, high failure rate, small space, and very inconvenient installation and maintenance.

[0007] 4. The motor has little room for speed increase, making it difficult to improve efficiency and speed. Summary of the invention

[0008] The present invention provides a potentiometer which can change the voltage polarity and voltage difference, output the voltage required for control, realize the simplification and compression of multiple control circuits, and achieve the purpose of saving materials, facilitating installation, use and maintenance.

[0009] In a first aspect, one or more embodiments of the present invention provide a potentiometer, wherein at least one sliding arm and at least one voltage dividing contact are arranged between a power supply terminal and a ground terminal of the potentiometer; or,

[0010] There are more than two sliding arms, and at least one sliding arm is in a heterodox configuration.

[0011] In a second aspect, one or more embodiments of the present invention provide a power control circuit, the control circuit comprising:

[0012] Potentiometer, used to change voltage polarity and voltage difference;

[0013] Interlock signal control circuit, used to realize interlock control of switch quantity;

[0014] The speed regulating switch circuit is used to realize the comprehensive control of analog quantity or analog quantity and switch quantity.

[0015] Optionally, the interlock signal control circuit outputs forward and reverse control signals according to the voltage polarity between the voltage dividing contact and the sliding arm.

[0016] Optionally, the speed regulating switch circuit adjusts the corresponding switch quantity and analog quantity according to the voltage value between the voltage dividing contact and the sliding arm.

[0017] Optionally, the interlock signal control circuit includes:

[0018] a first electronic switch, wherein a positive input terminal of the first electronic switch is connected to the voltage dividing contact, a first rectifying unit is arranged between the positive input terminal of the first electronic switch and the voltage dividing contact, and a negative input terminal of the first electronic switch is connected to the sliding arm;

[0019] A second electronic switch, wherein the positive input terminal of the second electronic switch is connected to the sliding arm, and a second rectifier unit is arranged between the positive input terminal of the second electronic switch and the voltage dividing contact, and the negative input terminal of the second electronic switch is connected to the voltage dividing contact.

[0020] Optionally, the speed regulating switch circuit includes:

[0021] A rectifier bridge, wherein the power input end of the rectifier bridge is respectively connected to the voltage dividing contact and the sliding arm;

[0022] A plurality of electronic switch circuits, each electronic switch in the electronic switch circuit has a preset conduction voltage value, and each electronic switch is turned on when the preset conduction voltage value is reached.

[0023] Optionally, the electronic switch circuit comprises:

[0024] n electronic switches, wherein the positive input terminal of each electronic switch is connected to the positive electrode of the rectifier bridge, and the negative input terminal of each electronic switch is connected to the negative electrode of the rectifier bridge;

[0025] The circuit between the positive input terminal of the nth electronic switch and the positive electrode of the rectifier bridge is provided with n-1 diodes, where n≥2.

[0026] Optionally, the rectifier bridge is a single-phase full-bridge rectifier.

[0027] In a third aspect, one or more embodiments of the present invention provide a power control device, the control device comprising:

[0028] An operating terminal, the operating terminal is used to issue a trigger instruction;

[0029] It includes a voltage regulating module, which changes the voltage difference and polarity according to the trigger instruction, and the voltage regulating module includes a potentiometer, and at least one sliding arm and at least one voltage dividing contact are arranged between the power supply end and the ground end of the potentiometer;

[0030] The execution side includes:

[0031] An interlock signal control circuit, wherein the interlock signal control circuit outputs a forward control signal and a reverse control signal according to the voltage polarity between the voltage dividing contact and the sliding arm;

[0032] A speed regulating switch circuit is provided, wherein the speed regulating switch circuit regulates power and speed according to the voltage value between the voltage dividing contact and the sliding arm.

[0033] In a fourth aspect, one or more embodiments of the present invention provide an application of a power control circuit, wherein the power control circuit is used to complete the control of a set of interlocking signals and the synchronous control of multiple sets of switching quantities and analog quantities.

[0034] Beneficial Effects

[0035] The present invention proposes a potentiometer, a power control circuit, a power control device and an application of the power control circuit, wherein at least one sliding arm and at least one voltage-dividing contact are arranged between the power supply end and the ground end of the potentiometer; or, more than two sliding arms, and at least one sliding arm is arranged at an opposite end; the power control circuit comprises: a voltage regulating module, which comprises a sliding arm, and the sliding arm is arranged with a voltage-dividing contact; an interlocking signal control circuit, the interlocking signal control circuit outputs a forward and reverse control signal according to the voltage polarity between the voltage-dividing contact and the sliding arm; a speed regulating switch circuit, the speed regulating switch circuit adjusts the motor speed and the on-off of the corresponding switch according to the voltage value between the voltage-dividing contact and the sliding arm;

[0036] 1. A potentiometer is provided, which can change the voltage polarity and voltage difference, output the voltage required for control, simplify and compress the control circuit, save materials, and is easy to install, use and maintain; in addition, it solves the accident of sudden full power output caused by the open circuit of the grounding terminal of the ordinary potentiometer.

[0037] 2. The operation end of this power control circuit adopts stepless smooth adjustment, which does not tire the wrist and is smooth to adjust, providing a good experience; the compression trolley slide section controls the number of wires, making installation, operation and maintenance easier.

[0038] 3. The speed control switch circuit can be used to upgrade the controller's speed gear, increase the motor speed, and increase the smoothness of motor control. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 A schematic diagram of the structure of a potentiometer according to an embodiment of the present invention;

[0041] Figure 2 is a schematic structural diagram of another potentiometer according to an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of the structure of a power control circuit according to an embodiment of the present invention;

[0043] Figure 4 for Figure 3 A circuit diagram of a specific power control circuit of an embodiment;

[0044] Figure 5 A schematic diagram of the structure of a potentiometer according to another embodiment of the present invention;

[0045] Figure 6 A schematic diagram of the structure of a potentiometer according to another embodiment of the present invention;

[0046] Figure 7 The figure is a schematic diagram of the structure of a power control device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0049] Embodiment one:

[0050] Figure 1 FIG. 4 shows a schematic diagram of the structure of a potentiometer according to an embodiment of the present invention. Figure 1As shown, at least one sliding arm and at least one voltage dividing contact are arranged between the power supply end and the ground end of the potentiometer, which can change the voltage polarity and voltage difference, output the voltage required for control, simplify and compress the control circuit, save materials, and facilitate installation, use and maintenance. For example, a voltage from 0 to the positive maximum value can be obtained from the voltage dividing point and the sliding arm; or a voltage from 0 to the negative maximum value. Moreover, no matter which end of the potentiometer has a circuit breaker fault, it is impossible to output a full voltage signal, thereby avoiding accidents caused by sudden uncontrolled full power output that cause injury or damage to equipment, and ensuring the safe operation of the equipment.

[0051] Embodiment 2:

[0052] Figure 2 FIG. 4 shows a schematic diagram of the structure of a potentiometer according to an embodiment of the present invention. Figure 2 As shown, two or more sliding arms are arranged between the power supply terminal and the ground terminal of the potentiometer, and at least one sliding arm is arranged at different ends. In this embodiment, there are two sliding arms, one of which is a setting arm (u1) and the other is an operating arm (u2).

[0053] Embodiment three:

[0054] Figure 3 A schematic diagram showing the structure of a power control circuit according to an embodiment is shown; Figure 4 for Figure 3 A circuit diagram of a specific power control circuit of an embodiment; Figure 5 Schematic diagram of the structure of a potentiometer according to an embodiment of the present invention;

[0055] like Figure 3-5 As shown, the control circuit includes:

[0056] Potentiometer 10, used to change voltage polarity and voltage difference;

[0057] An interlock signal control circuit 20 is used to realize interlock control of switch quantity;

[0058] The speed regulating switch circuit 30 is used to realize the comprehensive control of analog quantity or analog quantity and switch quantity.

[0059] In this embodiment, the main power source passes through the power adapter to obtain a stable DC voltage, which is added to the V of the potentiometer 10 in the figure. + , V0, by adjusting the relative position of the sliding arm and the voltage dividing contact, the voltage polarity and difference can be changed. For example, a voltage from 0 to the positive maximum value or a voltage from 0 to the negative maximum value can be obtained between u1 and u2; one of the paths outputs forward and reverse control signals according to the voltage polarity between the voltage dividing contact and the sliding arm through the interlocking signal control circuit 20; the other path is rectified by the rectifier bridge in the speed control switch circuit 30 and adjusts the motor speed according to the change of the voltage value between the voltage dividing contact and the sliding arm.

[0060] This embodiment proposes a power control circuit, which can realize interlocking control of switch quantity through interlocking signal control circuit; (for example, motor forward and reverse rotation, heating and cooling), and realize analog quantity or comprehensive control of analog quantity and switch quantity through speed control switch circuit. (Analog quantity is for the control of speed control and power control equipment; switch quantity is for example for the on and off of contactors and the start and stop of equipment).

[0061] Specifically, the interlock signal control circuit includes:

[0062] A first electronic switch 201, wherein the positive input terminal of the first electronic switch is connected to the voltage dividing contact, and a first rectifier unit is arranged between the positive input terminal of the first electronic switch and the voltage dividing contact, and the negative input terminal of the first electronic switch is connected to the sliding arm. When the first electronic switch is turned on, the reverse contactor (or forward contactor) controlled by the first electronic switch is closed;

[0063] A second electronic switch 202, wherein the positive input terminal of the second electronic switch is connected to the sliding arm, and a second rectifier unit is arranged between the positive input terminal of the second electronic switch and the voltage dividing contact, and the negative input terminal of the second electronic switch is connected to the voltage dividing contact. When the second electronic switch is turned on, the controlled forward contactor (reverse contactor) is energized.

[0064] It should be noted that the first and second rectifying units may be, for example, rectifying diodes or triodes, etc., which are not specifically limited. Rectifying diodes are preferred for cost considerations.

[0065] Specifically, the speed regulating switch circuit 30 includes:

[0066] A rectifier bridge 301, wherein the rectifier bridge power input terminal is respectively connected to the voltage dividing point u1 and the sliding arm u2;

[0067] A plurality of electronic switch circuits, each electronic switch in the electronic switch circuit has a preset conduction voltage value, and each electronic switch is turned on when the preset conduction voltage value is reached.

[0068] Specifically, the electronic switch circuit comprises:

[0069] n electronic switches, wherein the positive input terminal of each electronic switch is connected to the positive electrode of the rectifier bridge, and the negative input terminal of each electronic switch is connected to the negative electrode of the rectifier bridge;

[0070] The circuit between the positive input terminal of the nth electronic switch and the positive electrode of the rectifier bridge is provided with n-1 diodes, where n≥2.

[0071] like Figure 4As shown, as the voltage difference between u1 and u2 increases, the electronic switches in the electronic switch circuit work from right to left in sequence. It should be noted that the number of electronic switches in the speed control switch circuit is not limited, and can be increased according to the limit parameters of the components, thereby improving the speed and operating efficiency of the motor and increasing the smoothness of the motor control. It should also be noted that the type of electronic switch is not specifically limited. In this embodiment, a solid-state relay is selected, and it can also be a thyristor, a transistor, a field effect transistor, a thyristor, etc.

[0072] Preferably, the rectifier bridge is a single-phase full-bridge rectifier.

[0073] It should be noted that if Figure 5 As shown, the position of the voltage-dividing contact of the sliding arm configuration is not limited to the midpoint position; the position of the voltage-dividing contact can be adjusted up and down, the purpose of which is to change the voltage difference between u1 and u2 according to the sliding of the sliding arm, and to obtain the required specific voltage value adjustment range to achieve smooth voltage regulation.

[0074] In this embodiment, the main power source obtains a stable DC voltage after passing through the power adapter, and is added to the voltage regulating module 10 in the figure. The voltage difference is changed by adjusting the sliding arm and the voltage dividing contact. For example, a voltage from 0 to the positive maximum value can be obtained between u1 and u2; or a voltage from 0 to the negative maximum value; one of the paths is through the interlocking signal control circuit 20 to output forward and reverse control signals according to the voltage polarity between the voltage dividing contact and the sliding arm; the other path is through the speed regulating switch circuit 30 to adjust the motor speed according to the change in the voltage value between the voltage dividing contact and the sliding arm.

[0075] A core technical point of the power control circuit described in this embodiment is the special potentiometer design. A voltage divider contact is added between the power supply terminal and the ground terminal of the ordinary potentiometer to obtain the required specific voltage value adjustment range and realize the voltage zero-crossing adjustment. No matter which end of the potentiometer has a circuit breaker failure, it is impossible to output a limit voltage signal from the u1 and u2 terminals, thereby avoiding accidents caused by sudden full power output that injure people and damage equipment, and ensuring the safe operation of the equipment. Moreover, this design can realize the synchronous adjustment of two switching quantities with opposite meanings (positive, reverse, etc.) and a group of analog quantities or several groups of related switching quantities, simplifying the operation panel; reducing the number of control buttons, and making the operation clear and convenient.

[0076] Another core technical point of the power control circuit described in this embodiment is that a special potentiometer design is used to reduce the number of control wires from 6-8 to 2, which is convenient for installation, operation and maintenance. The speed control switch circuit can be used to upgrade the controller's speed gear, increase the motor speed or increase the smoothness of motor control.

[0077] Embodiment 4:

[0078] like Figure 7 As shown, this embodiment provides a power control device, the control device comprising:

[0079] The operating end 200 is used to issue a trigger instruction; the operating end 200 includes a voltage regulating module 10, the voltage regulating module changes the voltage difference and polarity according to the trigger instruction, and the voltage regulating module includes a sliding arm, and the sliding arm is provided with a voltage dividing contact;

[0080] The execution end 100 includes:

[0081] An interlock signal control circuit 20, wherein the interlock signal control circuit outputs a forward control signal and a reverse control signal according to the voltage polarity between the voltage dividing contact and the sliding arm;

[0082] The speed regulating switch circuit 30 adjusts the motor speed and turns on or off the corresponding electronic switch according to the voltage value between the voltage dividing contact and the sliding arm.

[0083] Specifically, the operating end transmits the control voltage to the execution end through the trolley slide wire.

[0084] Specifically, Figure 4 As shown, the interlock signal control circuit includes:

[0085] A first electronic switch 201, wherein the positive input terminal of the first electronic switch is connected to the voltage dividing contact, and a first rectifier unit is arranged between the positive input terminal of the first electronic switch and the voltage dividing contact, the negative input terminal of the first electronic switch is connected to the sliding arm, and the output contact of the first electronic switch can be connected to a reverse contactor coil loop, for example;

[0086] A second electronic switch 202, wherein the positive input terminal of the second electronic switch is connected to the sliding arm, and a second rectifier unit is arranged between the positive input terminal of the second electronic switch and the voltage dividing contact, the negative input terminal of the second electronic switch is connected to the voltage dividing contact, and the output contact of the second electronic switch can be connected to the forward contactor coil loop, for example.

[0087] It should be noted that the rectifying unit may be, for example, a rectifying diode or a triode, etc., which is not specifically limited. A rectifying diode is preferred for cost considerations.

[0088] Specifically, the speed regulating switch circuit 30 includes:

[0089] A rectifier bridge 301, wherein the rectifier bridge power input terminal is respectively connected to the voltage dividing point u1 and the sliding arm u2;

[0090] A plurality of electronic switch circuits, each electronic switch in the electronic switch circuit has a preset conduction voltage value, and each electronic switch is turned on when the preset conduction voltage value is reached.

[0091] Specifically, the electronic switch circuit comprises:

[0092] n electronic switches, wherein the positive input terminal of each electronic switch is connected to the positive electrode of the rectifier bridge, and the negative input terminal of each electronic switch is connected to the negative electrode of the rectifier bridge;

[0093] The circuit between the positive input terminal of the nth electronic switch and the positive electrode of the rectifier bridge is provided with n-1 diodes, where n≥2.

[0094] like Figure 4 As shown, as the voltage difference between u1 and u2 increases, the electronic switches in the electronic switch circuit work from right to left in sequence. It should be noted that the number of electronic switches in the speed control switch circuit is not limited, and can be increased according to the limit parameters of the components, thereby improving the speed and operating efficiency of the motor, and increasing the level and smoothness of the motor speed control. It should also be noted that the type of electronic switch is not specifically limited. In this embodiment, a solid-state relay is selected, and it can also be a thyristor, a transistor, a field effect transistor, a thyristor, etc.

[0095] Preferably, the rectifier bridge is a single-phase full bridge.

[0096] It should be noted that if Figure 5 As shown, the position of the voltage-dividing contact of the sliding arm configuration is not limited to the midpoint position; the position of the voltage-dividing contact can be adjusted up and down, the purpose of which is to change the voltage difference between u1 and u2 according to the sliding of the sliding arm, and to obtain the required voltage control range to achieve smooth voltage regulation.

[0097] The power control device described in this embodiment sends a trigger instruction through the operating end 200; the execution end 100 outputs forward and reverse control signals and motor speed regulation according to the trigger instruction; uses an analog signal to achieve dual control of switch quantity and analog quantity, reduces the number of control wires, and facilitates installation, operation and maintenance. The controller's speed gear can be upgraded through the speed regulation switch circuit, the motor speed can be increased, and the smoothness of the motor control can be increased.

[0098] Embodiment five:

[0099] An embodiment of the present invention provides an application of a power control circuit, wherein the power control circuit is used to generate forward and reverse control signals and speed regulation control to improve the operating speed and efficiency of equipment.

[0100] For example: forward and reverse control and speed regulation control of slip motor.

[0101] Embodiment six:

[0102] As a wide range temperature control circuit:

[0103] Temperature range: -20℃ to 300℃;

[0104] Heating device: 6 sets;

[0105] Refrigeration unit: 5 units;

[0106] Distance: 5km, controlled by cable;

[0107] In the related technology, it is necessary to manually control the heating or cooling and the number of units put into use, and the number of wires required is a 14-core cable;

[0108] This embodiment can be controlled by the power control circuit, and the selection of heating and cooling is realized through the interlocking signal control circuit; the selection of the number of units put into use is realized through the speed control switch circuit.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power control circuit, characterized in that: The control circuit comprises: Potentiometer, used to change voltage polarity and voltage difference; Interlock signal control circuit, used to realize interlock control of switch quantity; Speed ​​regulating switch circuit, used to realize the comprehensive control of analog quantity or analog quantity and switch quantity; At least one sliding arm and at least one voltage dividing contact are arranged between the power supply terminal and the ground terminal of the potentiometer; or, more than two sliding arms are arranged between the power supply terminal and the ground terminal of the potentiometer, and at least one sliding arm is arranged at an opposite end; The interlock signal control circuit comprises: a first electronic switch, wherein a positive input terminal of the first electronic switch is connected to the voltage dividing contact, a first rectifying unit is arranged between the positive input terminal of the first electronic switch and the voltage dividing contact, and a negative input terminal of the first electronic switch is connected to the sliding arm; a second electronic switch, wherein a positive input terminal of the second electronic switch is connected to the sliding arm, a second rectifier unit is arranged between the positive input terminal of the second electronic switch and the voltage dividing contact, and a negative input terminal of the second electronic switch is connected to the voltage dividing contact; The speed regulating switch circuit comprises: A rectifier bridge, wherein the power input end of the rectifier bridge is respectively connected to the voltage dividing contact and the sliding arm; A plurality of electronic switch circuits, each electronic switch in the electronic switch circuit has a preset conduction voltage value, and each electronic switch is turned on when the preset conduction voltage value is reached; The electronic switch circuit comprises: n electronic switches, wherein the positive input terminal of each electronic switch is connected to the positive electrode of the rectifier bridge, and the negative input terminal of each electronic switch is connected to the negative electrode of the rectifier bridge; The circuit between the positive input terminal of the nth electronic switch and the positive electrode of the rectifier bridge is provided with n-1 diodes, where n≥2.

2. The control circuit according to claim 1, characterized in that: The interlock signal control circuit outputs positive and reverse control signals according to the voltage polarity between the voltage dividing contact and the sliding arm.

3. The control circuit according to claim 1, characterized in that: The speed regulating switch circuit adjusts the corresponding switch quantity and analog quantity according to the voltage value between the voltage dividing contact and the sliding arm.

4. The control circuit according to claim 1, characterized in that: The rectifier bridge is a single-phase full-bridge rectifier.

5. A power control device, characterized in that: The control device comprises: An operating terminal, the operating terminal is used to issue a trigger instruction; It includes a voltage regulating module, which changes the voltage difference and polarity according to the trigger instruction, and the voltage regulating module includes a potentiometer, and at least one sliding arm and at least one voltage dividing contact are arranged between the power supply end and the ground end of the potentiometer; The execution side includes: An interlock signal control circuit, wherein the interlock signal control circuit outputs a forward control signal and a reverse control signal according to the voltage polarity between the voltage dividing contact and the sliding arm; A speed regulating switch circuit, wherein the speed regulating switch circuit adjusts power and speed according to the voltage value between the voltage dividing contact and the sliding arm; The interlock signal control circuit comprises: a first electronic switch, wherein a positive input terminal of the first electronic switch is connected to the voltage dividing contact, a first rectifying unit is arranged between the positive input terminal of the first electronic switch and the voltage dividing contact, and a negative input terminal of the first electronic switch is connected to the sliding arm; a second electronic switch, wherein a positive input terminal of the second electronic switch is connected to the sliding arm, a second rectifier unit is arranged between the positive input terminal of the second electronic switch and the voltage dividing contact, and a negative input terminal of the second electronic switch is connected to the voltage dividing contact; The speed regulating switch circuit comprises: A rectifier bridge, wherein the power input end of the rectifier bridge is respectively connected to the voltage dividing contact and the sliding arm; A plurality of electronic switch circuits, each electronic switch in the electronic switch circuit has a preset conduction voltage value, and each electronic switch is turned on when the preset conduction voltage value is reached; The electronic switch circuit comprises: n electronic switches, wherein the positive input terminal of each electronic switch is connected to the positive electrode of the rectifier bridge, and the negative input terminal of each electronic switch is connected to the negative electrode of the rectifier bridge; The circuit between the positive input terminal of the nth electronic switch and the positive electrode of the rectifier bridge is provided with n-1 diodes, where n≥2.

6. Application of the power control circuit according to any one of claims 1 to 4, characterized in that: The power control circuit is used to complete the control of a group of interlocking signals and the synchronous control of multiple groups of switching quantities and analog quantities.

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