Wide voltage module for accessory of alternating current contactor

Abstract

The utility model discloses a wide voltage module for an accessory of an alternating current contactor, which comprises the accessory provided with a circuit board. The alternating current and direct current module is used for converting the input alternating current voltage or direct current voltage into correspondingly output direct current voltage; and the input end of the coil driving module is electrically connected with the output end of the alternating current and direct current module. A voltage sampling module outputs a high-level voltage signal or a low-level voltage signal according to an input voltage value, a control module makes a voltage signal for driving an alternating current contactor to be closed or released according to the high-level signal and the low-level signal, and after closing, the control module adjusts the duty ratio, so that a coil driving module only outputs a holding current of 10 mA to 13 mA; according to the scheme, the input AC / DC voltage range is 24V-480V, the size and the cost of the voltage conversion device are reduced, the adaptability of the power supply is improved, and the energy consumption is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of contactor technology, and in particular to a wide voltage module for an accessory of an AC contactor. Background Technology

[0002] AC contactors, as an important electrical control component, achieve circuit switching control through the principle of electromagnetic induction, and possess high reliability, flexibility, and safety. They are widely used in industrial automation, power systems, and other fields, and are an indispensable part of modern electrical control systems.

[0003] In existing AC contactor applications, coil drive generally relies on a stable rated voltage input. However, in real-world applications, the external power supply voltage often fluctuates and can sometimes exceed the drive voltage required by the contactor coil. To ensure the normal operation of the contactor coil and avoid damage caused by overvoltage, additional voltage conversion devices are typically required, such as step-down modules and AC-DC converters.

[0004] While these additional devices can solve the voltage mismatch problem, they undoubtedly introduce additional costs, size and complexity, reducing the overall efficiency and reliability of the system, especially in some cost-sensitive or space-constrained applications. Therefore, the applicant has made a beneficial design and found a way to solve the above problems. The technical solution to be introduced below is generated in this context. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the existing designs mentioned in the background art above, and to provide a product that is energy-saving, reduces usage costs, and has good applicability.

[0006] A wide-voltage module for an AC contactor accessory includes an accessory with a circuit board. The circuit board includes: an AC / DC module for converting an input AC voltage or DC voltage into a corresponding output DC voltage; and a coil drive module, the input terminal of which is electrically connected to the output terminal of the AC / DC module. The system includes a voltage sampling module electrically connected to the input of the AC / DC module. This module collects the input voltage value, compares it with the set rated coil voltage, and outputs a high-level or low-level signal. A control module electrically connected to the output of the voltage sampling module controls the AC contactor to engage or disengage based on the high-voltage or low-level signal. The output of the control module is electrically connected to the coil drive module, which outputs a voltage signal and a current signal indicating when the AC contactor's coil is engaged and maintaining the engaged state. The coil drive module boosts the voltage and current signals. A step-down module electrically connected to both the control and AC / DC modules steps down the DC voltage to power the control module.

[0007] Preferably, the AC / DC module includes a DF1 bridge, a D0 diode, a D10 diode, an E1 polarized capacitor, an E2 polarized capacitor, an R23 resistor, an R24 resistor, an R1 resistor, an R2 resistor, and an R4 resistor. Ports 1 and 2 of the DF1 bridge are configured as input ports. A PV1 resistor is connected in parallel between ports 1 and 2 of the DF1 bridge. The D0 diode is connected in series at port 2 of the DF1 bridge. The two ends of the D10 diode are electrically connected to port 1 of the DF1 bridge and the output terminal of the D0 diode, respectively. A R1 resistor is connected in series with the D0 diode, and a R2 resistor is connected in series with the R1 resistor. Resistor R4 is connected in series with resistor R2. Resistor R2 and resistor R3 are connected in series with capacitor C0. The positive terminal of capacitor E1 is electrically connected to port 3 of bridge DF1. The negative terminal of capacitor E1 is electrically connected to the positive terminal of capacitor E3. Resistor R23 is connected in parallel with capacitor E1. Resistor R24 ​​is connected in parallel with capacitor E2.

[0008] Preferably, the voltage sampling module includes a U1 chip, resistors R9, R21, and R22, a D4 Zener diode, a D9 Zener diode, a C5 capacitor, and a C13 capacitor. Port 7 of the U1 chip is electrically connected to resistor R4. Capacitor C5 is connected in series to port 1 of the U1 chip. Resistor R9 is connected in series to port 4 of the U1 chip. The D9 Zener diode is connected in parallel to resistor R9. Resistor R21, the D4 Zener diode, and capacitor C13 are connected in series to port 7 of the U1 chip. Resistor R21 is connected in series to resistor R22.

[0009] Preferably, the step-down module includes a U2 chip, a D2 diode, a D6 diode, a D8 diode, resistors R3, R14, R15, R16, and R20, an E2 polarized capacitor, a C1 capacitor, a C2 capacitor, a C3 capacitor, and an L1 inductor. One end of the R15 resistor is connected to the positive terminal of the E2 polarized capacitor and to port 6 of the U2 chip. The other end of the R15 resistor is connected to port 8 of the U2 chip. One end of the D8 diode is connected to port 6 of the U2 chip. The other end of the D8 diode is connected to port 3 of the DF1 bridge. Ports 5 and 6 of the U2 chip are connected. The C2 capacitor... The two ends of the resistor R16 are electrically connected to ports 1 and 2 of the U2 chip, respectively. The two ends of the resistor R3 are electrically connected to ports 2 and 4 of the U2 chip, respectively. The two ends of the resistor R16 are electrically connected to ports 2 and 4 of the U2 chip, respectively. The resistor R14 is connected in series with port 3 of the U2 chip. The two ends of the capacitor C1 are electrically connected to the resistor R14 and the inductor L1. One end of the diode D6 and one end of the inductor L1 are electrically connected to port 2 of the U2 chip. The two ends of the diode D2 are electrically connected to one end of the capacitor C1 and the other end of the inductor L1, respectively. The resistor R20 and one end of the capacitor C3 are electrically connected to the other end of the inductor L1.

[0010] Preferably, the control module includes a U3 chip, resistors R17, R18, and R19, and capacitors C4, C6, C9, C12, C15, C16, and C17. Port 9 of the U3 chip is electrically connected to port 1 of the U1 chip. One end of capacitor C6 is connected in series with port 1 of the U3 chip. One end of resistor R17 is connected in series with port 2 of the U3 chip. Capacitor C15 is connected in parallel with resistor R17. One end of resistor R18 is connected in series with the U3 chip. The C16 capacitor is connected in parallel with the R18 resistor, one end of the R19 resistor is connected in series with the U3 chip's port 4, the C17 capacitor is connected in parallel with the R19 resistor, one end of the C12 capacitor is connected in series with the U3 chip's port 9, one end of the C4 capacitor is connected in series with the U3 chip's port 8, the U3 chip's port 7 is electrically connected to one end of the D3 diode, one end of the C9 capacitor is connected in series with the U3 chip's port 6, and the U3 chip's port 6 is also electrically connected to the other end of the L1 current transformer.

[0011] Preferably, the coil driving module includes resistors R5, R6, R8, R11, R12, and R13, diode D1, diode D3, MOSFET Q1, transistor Q2, a first coil output terminal, and a second coil output terminal. Port 2 of the MOSFET Q1 is electrically connected to the second coil output terminal. Diode D1 is electrically connected to both port 2 of the MOSFET Q1 and the first coil output terminal. The first coil output terminal is also electrically connected to port 3 of the DF1 bridge. The two ends of resistor R6 are connected to the diodes D1 and D3. The MOSFET's ports 1 and 3 are electrically connected. One end of diode D3 is electrically connected to port 1 of MOSFET Q1. Resistor R5 is connected in parallel with diode D3. Port 2 of transistor Q2 is electrically connected to one end of R5. Port 1 of transistor Q2 is electrically connected to the other end of R5. One end of resistor R12 is electrically connected to port 3 of MOSFET Q1. Resistors R11 and R13 are connected in parallel with resistor R12. Therefore, the two ends of resistor R8 are electrically connected to resistor R11 and port 8 of chip U3, respectively.

[0012] Preferably, port 4 of the bridge is electrically connected to one end of diodes D4 and D6, capacitors C0, C3, C4, C5, C6, C9, C14, resistors R9, R11, R17, R18, R19, R20, and R22. Port 4 of the bridge is also electrically connected to the negative terminal of capacitors E2 and E3, port 2 of transistor Q2, ports 0, 5, and 9 of chip U3, and port 8 of chip U2. Beneficial effects

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] (1) In this utility model, when the voltage value detected by the voltage sampling module is higher than the rated pull-in voltage of the AC contactor coil, the voltage sampling module outputs a high-level signal to activate the control module, so that it outputs a voltage signal to drive the coil to operate to the coil drive module, thereby driving the AC contactor coil to be energized and perform the pull-in action; conversely, when the voltage value is lower than the rated pull-in voltage, the control module does not output a voltage signal, and the coil drive module does not output any DC voltage to the coil, so that the AC contactor is in the released state; in addition, the input AC and DC voltage range can be selected as 24V~480V. Through the above design, this solution effectively reduces the volume of the voltage conversion device and the initial investment cost, improves the input power adaptability of the AC contactor, and makes the product have the advantages of reduced use cost and good applicability.

[0015] (2) In this utility model, the control module adjusts the output current signal by adjusting the duty cycle. When the coil is in the process of being pulled in, the control module outputs the rated pull-in current signal to the coil drive module to ensure that the coil is reliably pulled in. When the AC contactor is fully pulled in, the control module automatically adjusts the duty cycle of the output signal so that the coil drive module only outputs a holding current of 10mA~13mA to maintain the coil's pull-in state. Through the above design, this solution effectively reduces the working energy consumption of the AC contactor coil, giving the product the advantage of energy saving. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a wide voltage module for an accessory of an AC contactor according to the present invention;

[0017] Figure 2 This is an internal front view of a wide voltage module for an accessory of an AC contactor according to this utility model;

[0018] Figure 3 This is a logic diagram of a wide voltage module for an accessory of an AC contactor according to the present invention;

[0019] Figure 4 This is a circuit diagram of an AC / DC module for a wide voltage module used in the accessories of an AC contactor according to this utility model.

[0020] Figure 5 This is a circuit diagram of a voltage sampling module for a wide voltage module used in an AC contactor accessory according to this utility model.

[0021] Figure 6 This is a circuit diagram of the control module for a wide voltage module for an accessory of an AC contactor according to the present invention.

[0022] Figure 7 This is a circuit diagram of a step-down module for a wide voltage module used in the accessories of an AC contactor according to this utility model;

[0023] Figure 8 This is a circuit diagram of the coil drive module of a wide voltage module for an AC contactor accessory according to the present invention.

[0024] Figure 9 This is the overall circuit diagram of a wide voltage module for an accessory of an AC contactor according to this utility model;

[0025] The correspondence between the labels and component names in the attached figures is as follows:

[0026] Reference numerals: 1. Accessory; 2. Circuit board; 3. First coil output terminal; 4. Second coil output terminal; 5. AC contactor. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] Reference example Figures 1 to 9 A wide-voltage module for an AC contactor accessory includes an accessory 1. The accessory 1 has a circuit board 2, which includes: an AC / DC module for converting an input AC voltage or DC voltage into a corresponding output DC voltage; a coil drive module, the input of which is electrically connected to the output of the AC / DC module; a voltage sampling module, the input of which is electrically connected to the input of the AC / DC module, for acquiring the voltage value of the input voltage, comparing it with a set rated coil voltage, and outputting a high-level signal or a low-level signal; a control module, the output of which is electrically connected to the output of the voltage sampling module, for controlling the AC contactor 5 to perform engaging or disengaging actions based on the high-voltage signal or the low-level signal; the output of which is electrically connected to the coil drive module, for outputting a voltage signal and a current signal when the coil of the AC contactor 5 is engaged and when maintaining the coil in the engaged state; the coil drive module is used to boost the voltage signal and the current signal; and a step-down module, the output of which is electrically connected to the input of the control module, and the input of which is electrically connected to the AC / DC module, for stepping down the DC voltage to power the control module.

[0031] It is worth mentioning that the AC / DC module includes a DF1 bridge, a D0 diode, a D10 diode, an E1 polarized capacitor, an E2 polarized capacitor, a R23 resistor, an R24 resistor, a R1 resistor, a R2 resistor, and an R4 resistor. Ports 1 and 2 of the DF1 bridge are set as input ports. A PV1 resistor is connected in parallel between ports 1 and 2 of the DF1 bridge. The D0 diode is connected in series with port 2 of the DF1 bridge. The two ends of the D10 diode are electrically connected to port 1 of the DF1 bridge and the output terminal of the D0 diode, respectively. A R1 resistor is connected in series with the D0 diode. A R2 resistor is connected in series with the R1 resistor. A R4 resistor is connected in series with the R2 resistor. A C0 capacitor is connected in series between the R2 and R3 resistors. The positive terminal of the E1 polarized capacitor is electrically connected to port 3 of the DF1 bridge. The negative terminal of the E1 polarized capacitor is electrically connected to the positive terminal of the E3 polarized capacitor. A R23 resistor is connected in parallel with the E1 polarized capacitor. A R24 resistor is connected in parallel with the E2 polarized capacitor.

[0032] The RV1 resistor is a varistor, and its resistance changes with the voltage applied across its terminals. Therefore, diodes D0 and D10 are electrically connected to the output terminals of the RV1 resistor. The DF1 bridge supports a wide input range of 110V-260V AC / DC. The DF1 bridge converts the input AC voltage into DC voltage and outputs it from ports 3 and 4. The capacitor absorbs voltage fluctuations through the charging and discharging process in the circuit, making the output voltage more stable.

[0033] It is worth mentioning that the voltage sampling module includes a U1 chip, resistors R9, R21, and R22, a D4 Zener diode, a D9 Zener diode, a C5 capacitor, and a C13 capacitor. Port 7 of the U1 chip is electrically connected to resistor R4. Capacitor C5 is connected in series to port 1 of the U1 chip. Resistor R9 is connected in series to port 4 of the U1 chip. Zener diode D9 is connected in parallel to resistor R9. Resistor R21, Zener diode D4, and capacitor C13 are connected in series to port 7 of the U1 chip. Resistor R21 is connected in series to resistor R22. R21 and R22 are used to limit the input current and perform voltage division detection to ensure compatibility with wide voltage input.

[0034] It is worth mentioning that the step-down module includes a U2 chip, diodes D2, D6, and D8, resistors R3, R14, R15, R16, and R20, a polarized capacitor E2, capacitors C1, C2, and C3, and an inductor L1. One end of resistor R15 is connected to the positive terminal of capacitor E2 and to port 6 of the U2 chip, while the other end is connected to port 8 of the U2 chip. One end of diode D8 is connected to port 6 of the U2 chip, and the other end is connected to port 3 of the DF1 bridge. Ports 5 and 6 of the U2 chip are connected. The capacitor C2... The two ends of capacitor C1 are electrically connected to ports 1 and 2 of chip U2, respectively. The two ends of resistor R3 are electrically connected to ports 2 and 4 of chip U2, respectively. The two ends of resistor R16 are electrically connected to ports 2 and 4 of chip U2, respectively. Resistor R14 is connected in series to port 3 of chip U2. The two ends of capacitor C1 are electrically connected to resistor R14 and inductor L1. One end of diode D6 and one end of inductor L1 are electrically connected to port 2 of chip U2. The two ends of diode D2 are electrically connected to one end of capacitor C1 and the other end of inductor L1, respectively. Resistor R20 and one end of capacitor C3 are electrically connected to the other end of inductor L1.

[0035] It is worth mentioning that the control module includes a U3 chip, resistors R17, R18, and R19, and capacitors C4, C6, C9, C12, C15, C16, and C17. Port 9 of the U3 chip is electrically connected to port 1 of the U1 chip. One end of capacitor C6 is connected in series with port 1 of the U3 chip. One end of resistor R17 is connected in series with port 2 of the U3 chip. Capacitor C15 is connected in parallel with resistor R17. One end of resistor R18 is connected in series with port 3 of the U3 chip. Capacitor C16 is connected in parallel with resistor R18. One end of resistor R19 is connected in series with port 4 of the U3 chip. A capacitor (C17) is connected in parallel with a resistor (R19). One end of capacitor (C12) is connected in series with port 9 of the U3 chip. One end of capacitor (C4) is connected in series with port 8 of the U3 chip. Port 7 of the U3 chip is electrically connected to one end of diode (D3). One end of capacitor (C9) is connected in series with port 6 of the U3 chip. Port 6 of the U3 chip is also electrically connected to the other end of the L1 current transformer. Resistors (C15, C16, C18, and C17) are connected in parallel with resistors (R19) to filter out high-frequency noise or interference signals. The capacitors buffer instantaneous current through their energy storage characteristics, and the resistors control the charging and discharging speed, balancing response time and stability, and preventing overcurrent.

[0036] It is worth mentioning that the coil drive module includes resistors R5, R6, R8, R11, R12, and R13, diodes D1 and D3, a MOSFET Q1, a transistor Q2, a first coil output terminal 3, and a second coil output terminal 4. Port 2 of the MOSFET Q1 is electrically connected to the second coil output terminal 4. Diode D1 is electrically connected to both port 2 of the MOSFET Q1 and the first coil output terminal 3. The first coil output terminal 3 is also electrically connected to port 3 of the DF1 bridge. Resistors R6 are connected to ports 1 and 3 of the MOSFET Q1. One end of diode D3 is connected to port 1 of the MOSFET Q1. Resistor R5 is connected in parallel with diode D3. Port 2 of the transistor Q2 is connected to one end of resistor R5, and port 1 of the transistor Q2 is connected to the other end of resistor R5. One end of resistor R12 is connected to port 3 of the MOSFET Q1. R1... Resistors R11 and R13 are connected in parallel with resistor R12. Therefore, the two ends of resistor R8 are electrically connected to resistor R11 and port 8 of chip U3, respectively. MOSFET Q1 acts as an electronic switch, controlling the on / off state of the circuit. When the gate voltage is higher than the threshold voltage, MOSFET Q1 conducts, forming a low-impedance channel that allows current to pass through. When the gate voltage is lower than the threshold voltage, MOSFET Q1 is cut off, and the channel is closed. MOSFET Q1 also acts as an amplifier, amplifying the current and voltage of the input signal. Transistor Q2 is a PNP transistor. PNP transistors can amplify a weak base current into a larger collector current. When the base current increases, the current between the emitter and collector increases accordingly, creating an amplification effect. The coil drive module boosts the voltage and current signals, causing the first coil output terminal 3 and the second coil output terminal 4 to output the rated DC voltage and current values ​​of the driving coil.

[0037] It is worth mentioning that port 4 of the DF1 bridge is electrically connected to one end of diodes D4 and D6, capacitors C0, C3, C4, C5, C6, C9, C14, resistors R9, R11, R17, R18, R19, R20, and R22. Port 4 of the bridge is also electrically connected to the negative terminal of capacitors E2 and E3, port 2 of transistor Q2, ports 0, 5, and 9 of chip U3, and port 8 of chip U2. Port 4 of the DF1 bridge outputs negative DC power to supply power to the above electronic components.

[0038] The working principle of this utility model is described as follows:

[0039] When the input AC / DC voltage is between 110V and 260V, the AC / DC module converts the input voltage and outputs DC voltage at its No. 3 and No. 4 ports. The step-down module converts the high-voltage DC power into a stable and low-voltage DC power to supply power to the No. 6 port of the U3 chip.

[0040] The voltage acquisition module is set with the rated voltage of the coil. The voltage acquisition module collects AC and DC voltage values. When the input AC and DC voltage values ​​are higher than the rated voltage values ​​of the coil, the port 4 of the U1 chip outputs a high-level signal to the port 10 of the U3 chip. The port 10 of the U3 chip receives the high-level signal and activates the U3 chip to work. The U3 chip outputs a voltage signal to drive the coil to the coil drive module, which in turn drives the coil of the AC contactor 5 to be energized and perform the energizing action.

[0041] Conversely, when the input AC / DC voltage is lower than the rated voltage of the coil, the U1 chip outputs a low-level signal from port 4 to port 10 of the U3 chip. The low-level signal cannot activate the U3 chip, so the control module does not output a voltage signal at this time, and the coil drive module does not output any DC voltage to the coil, so that the AC contactor 5 is in the released state.

[0042] Meanwhile, the U3 chip outputs a corresponding current signal by adjusting the duty cycle. When the coil is in the process of being pulled in, the U3 chip outputs a rated pull-in current signal to the coil drive module to ensure that the coil is reliably pulled in. When the AC contactor 5 is fully pulled in, the U3 chip automatically adjusts the duty cycle of the output pull-in current signal so that the coil drive module only outputs a holding current of 13mA to maintain the coil's pull-in state.

[0043] Through the above design, this solution effectively reduces the size of the voltage conversion device and the initial investment cost, as well as the working energy consumption of the AC contactor 5 coil, and improves the input power adaptability of the AC contactor 5, giving the product the advantages of reduced operating costs, good applicability, and energy saving.

[0044] This design also provides different wide voltage input ranges, such as 24V~60V, 110V~260V or 300V~480V, with corresponding coil holding currents of 10.8mA, 13mA and 11mA. Users can select different specifications of accessory 1 according to the actual power supply voltage.

[0045] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A wide voltage module for accessories of an AC contactor, comprising an accessory (1) provided with a circuit board (2), characterized in that: The circuit board (2) includes; AC / DC module, used to convert input AC voltage or DC voltage into corresponding output DC voltage; A coil drive module, wherein the input terminal of the coil drive module is electrically connected to the output terminal of the AC / DC module. The voltage sampling module is electrically connected to the input terminal of the AC / DC module. It is used to collect the voltage value of the input voltage, compare it with the set rated voltage of the coil, and then output a high-level signal or a low-level signal. The control module is electrically connected to the output of the voltage sampling module and is used to control the AC contactor (5) to perform a pull-in or release action based on a high voltage signal or a low level signal. The output terminal of the control module is electrically connected to the coil drive module and is used to output voltage signals and current signals when the coil of the AC contactor (5) is engaged and when the coil is kept engaged. The coil drive module is used to boost voltage and current signals; The step-down module has its output terminal electrically connected to the input terminal of the control module and its input terminal electrically connected to the AC / DC module. It is used to step down the DC voltage to power the control module.

2. The wide voltage module for accessories of the AC contactor according to claim 1, characterized in that: The AC / DC module includes a DF1 bridge, a D0 diode, a D10 diode, an E1 polarized capacitor, an E2 polarized capacitor, resistors R23 and R24, resistors R1, R2, and R4. Ports 1 and 2 of the DF1 bridge are set as input ports. A PV1 resistor is connected in parallel between ports 1 and 2 of the DF1 bridge. The D0 diode is connected in series at port 2 of the DF1 bridge. The two ends of the D10 diode are electrically connected to port 1 of the DF1 bridge and the output terminal of the D0 diode, respectively. Resistor R1 is connected in series with diode D0, resistor R2 is connected in series with resistor R1, and resistor R4 is connected in series with resistor R2. A C0 capacitor is connected in series between resistors R2 and R3. The positive terminal of the E1 polarized capacitor is electrically connected to port 3 of the DF1 bridge, and the negative terminal of the E1 polarized capacitor is electrically connected to the positive terminal of capacitor E3. Resistor R23 is connected in parallel with capacitor E1, and resistor R24 ​​is connected in parallel with capacitor E2.

3. The wide voltage module for accessories of an AC contactor according to claim 2, characterized in that: The voltage sampling module includes a U1 chip, resistors R9, R21, and R22, a D4 Zener diode, a D9 Zener diode, a C5 capacitor, and a C13 capacitor. Port 7 of the U1 chip is electrically connected to resistor R4. Capacitor C5 is connected in series to port 1 of the U1 chip. Resistor R9 is connected in series to port 4 of the U1 chip. The D9 Zener diode is connected in parallel to resistor R9. Resistor R21, the D4 Zener diode, and capacitor C13 are connected in series to port 7 of the U1 chip. Resistor R21 is connected in series with resistor R22.

4. The wide voltage module for accessories of an AC contactor according to claim 3, characterized in that: The step-down module includes a U2 chip, diodes D2, D6, and D8, resistors R3, R14, R15, R16, and R20, a polarized capacitor E2, capacitors C1, C2, and C3, and an inductor L1. One end of resistor R15 is connected to the positive terminal of capacitor E2 and to port 6 of the U2 chip. The other end of resistor R15 is connected to port 8 of the U2 chip. One end of diode D8 is connected to port 6 of the U2 chip, and the other end is connected to port 3 of the DF1 bridge. Ports 5 and 6 of the U2 chip are connected. The two ends of capacitor C2... The terminals of resistor R16 and R14 are connected in series to port 3 of the U2 chip. The terminals of capacitor C1 are connected to resistor R14 and inductor L1. One end of diode D6 and one end of inductor L1 are connected to port 2 of the U2 chip. The terminals of diode D2 are connected to one end of capacitor C1 and the other end of inductor L1. The terminals of resistor R20 and one end of capacitor C3 are connected to the other end of inductor L1.

5. The wide voltage module for accessories of an AC contactor according to claim 4, characterized in that: The control module includes a U3 chip, resistors R17, R18, and R19, and capacitors C4, C6, C9, C12, C15, C16, and C17. Port 9 of the U3 chip is electrically connected to port 1 of the U1 chip. One end of capacitor C6 is connected in series with port 1 of the U3 chip. One end of resistor R17 is connected in series with port 2 of the U3 chip. Capacitor C15 is connected in parallel with resistor R17. One end of resistor R18 is connected in series with port 3 of the U3 chip. Port 4 of U3 chip is connected in parallel with capacitor C16 and resistor R18. One end of resistor R19 is connected in series with port 4 of U3 chip. Capacitor C17 is connected in parallel with resistor R19. One end of capacitor C12 is connected in series with port 9 of U3 chip. One end of capacitor C4 is connected in series with port 8 of U3 chip. Port 7 of U3 chip is electrically connected to one end of diode D3. One end of capacitor C9 is connected in series with port 6 of U3 chip. Port 6 of U3 chip is also electrically connected to the other end of current transformer L1.

6. The wide voltage module for accessories of an AC contactor according to claim 5, characterized in that: The coil driving module includes resistors R5, R6, R8, R11, R12, and R13, diode D1, diode D3, Q1 MOS transistor, Q2 transistor, a first coil output terminal (3), and a second coil output terminal (4). Port 2 of the Q1 MOS transistor is electrically connected to the second coil output terminal (4). Diode D1 is electrically connected to both port 2 of the Q1 MOS transistor and the first coil output terminal (3). The first coil output terminal (3) is also electrically connected to port 3 of the DF1 bridge. Resistor R6... The two ends of the resistor R8 are electrically connected to ports 1 and 3 of the Q1 MOS transistor. One end of the diode D3 is electrically connected to port 1 of the Q1 MOS transistor. The resistor R5 is connected in parallel with the diode D3. Port 2 of the Q2 transistor is electrically connected to one end of R5. Port 1 of the Q2 transistor is electrically connected to the other end of R5. One end of the resistor R12 is electrically connected to port 3 of the Q1 MOS transistor. Resistors R11 and R13 are connected in parallel with resistor R12. Therefore, the two ends of the resistor R8 are electrically connected to resistor R11 and port 8 of the U3 chip, respectively.

7. The wide voltage module for accessories of the AC contactor according to claim 6, characterized in that: Port 4 of the bridge is electrically connected to one end of diodes D4 and D6, capacitors C0, C3, C4, C5, C6, C9, C14, resistors R9, R11, R17, R18, R19, R20, and R22. Port 4 of the bridge is also electrically connected to the negative terminal of capacitors E2 and E3, port 2 of transistor Q2, ports 0, 5, and 9 of chip U3, and port 8 of chip U2.

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