Overvoltage suppressor for contactor

Abstract

The utility model relates to the technical field of low-voltage electric appliances, in particular to an overvoltage suppressor for a contactor, and can solve the problem that the stability of an existing overvoltage suppressor applied to the contactor still needs to be improved to a certain extent. The overvoltage suppressor for the contactor comprises a first resistor, a light-emitting diode, a surge absorption diode, a second resistor, a diode, a protective shell and a printed board assembly, and the first resistor, the second resistor, the diode, the light-emitting diode and the surge absorption diode are all fixedly arranged on the printed board assembly. The printed board assembly is arranged in the protective shell and is connected with the contactor coil in parallel, after the coil controls voltage to be powered off, the printed board assembly can absorb reverse electromotive force generated by the coil, meanwhile, a light-emitting diode indicates the action state, the contactor coil is protected, and the reliability of the contactor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to an overvoltage suppressor for a contactor. Background Art

[0002] A contactor is a widely used switching device that primarily controls the connection and disconnection of the load circuit it houses by controlling the closing and opening of its moving and stationary contacts. The proper operation of a contactor is closely related to its closing stability. The distance between the moving and stationary contacts when they are separated significantly affects the closing stability of the contactor. An overvoltage suppressor is used in the contactor control circuit as a component of the contactor, connected in parallel with the contactor's electromagnetic coil. It absorbs the reverse electromotive force generated when the coil is de-energized, and a light-emitting diode indicates the status of the absorbed reverse electromotive force.

[0003] Conventional overvoltage suppressor structures incorporate a variable impedance material into the device structure. This variable impedance material electrically connects a signal electrode to a ground electrode. When the overvoltage suppressor is within its normal operating voltage range, the variable impedance material is in a high impedance state. At this time, the voltage and current on the signal electrode are not transferred to the ground electrode. However, when an abnormal overvoltage surge occurs on the signal electrode, the variable impedance material's characteristics cause it to transition to a low impedance state. At this point, the surge energy is transferred from the signal electrode through the variable impedance material to the ground electrode and discharged to ground. Therefore, the characteristics of the variable impedance material maintain the voltage on the signal electrode within a range that will not damage the circuit, thereby achieving the purpose of circuit protection.

[0004] However, the stability of existing overvoltage suppressors used in contactors still needs to be improved. Utility Model Content

[0005] In order to solve the problem that the stability of the existing overvoltage suppressor used in contactors still needs to be improved, the present application provides an overvoltage suppressor for a contactor.

[0006] The embodiment of the present application is implemented as follows:

[0007] In a first aspect, the present application provides an overvoltage suppressor for a contactor, comprising a first resistor, a light-emitting diode, a surge absorber diode, a second resistor, a diode, a protective housing, and a printed circuit board assembly;

[0008] The first resistor, the second resistor, the diode, the light emitting diode and the surge absorber diode are all fixedly arranged on the printed circuit board assembly;

[0009] The printed circuit board assembly is arranged in the protective shell.

[0010] In a possible implementation, the diode is connected in series with the surge absorption diode and the second resistor.

[0011] In a possible implementation, the light emitting diode is connected in series with the first resistor and in parallel with the surge absorption diode.

[0012] In a possible implementation, the negative end of the diode is connected to the positive electrode of the DC control power supply, and one end of the second resistor is connected to the negative electrode of the DC control power supply.

[0013] In a possible implementation, a fastener is installed in the protective shell, and the printed circuit board assembly is fixed in the protective shell by the fastener.

[0014] In a possible implementation, an insulating plate is further provided at the bottom of the protective shell, and the protective shell is sealed and insulated by the insulating plate.

[0015] In a possible implementation, the fasteners are two fastening bolts and screw holes.

[0016] The technical solution provided by this application can achieve at least the following beneficial effects:

[0017] The overvoltage suppressor for contactors provided in this application is connected in parallel with the contactor coil. After the coil control voltage is powered off, it can absorb the reverse electromotive force generated by the coil. At the same time, a light-emitting diode indicates the operation status, thereby protecting the contactor coil and improving the reliability of the contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 This is a schematic diagram of the electrical principle of an overvoltage suppressor for a contactor shown in an exemplary embodiment of the present application;

[0020] Figure 2 1 is a schematic cross-sectional view of a cross-sectional structure of an overvoltage suppressor for a contactor shown in an exemplary embodiment of the present application;

[0021] Figure 3 This is a partial three-dimensional structural diagram of another overvoltage suppressor for a contactor shown in an exemplary embodiment of the present application;

[0022] Figure 4 It is a partial three-dimensional structural diagram of another overvoltage suppressor for a contactor shown in an exemplary embodiment of the present application.

[0023] Figure numerals: 1. first resistor; 2. light-emitting electrode tube; 3. surge absorption diode; 4. second resistor; 5. diode; 6. positive electrode; 7. negative electrode; 8. protective shell; 9. printed circuit board assembly; 10. fastener; 11. insulating board. DETAILED DESCRIPTION

[0024] In order to make the purpose, implementation methods and advantages of the present application clearer, the exemplary implementation methods of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0026] In the specification and claims of this application and the accompanying drawings, the terms "first," "second," "third," etc. are used to distinguish similar or similar objects or entities, and are not necessarily intended to limit a particular order or sequence, unless otherwise noted. It should be understood that the terms used in this manner are interchangeable under appropriate circumstances.

[0027] The terms "comprise," "include," and "have," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0028] Before explaining the overvoltage suppressor for a contactor and the working method provided in the embodiments of the present application, the application scenarios and implementation environment of the embodiments of the present application are first introduced.

[0029] A contactor is a widely used switching device that primarily controls the connection and disconnection of the load circuit it houses by controlling the closing and opening of its moving and stationary contacts. The proper operation of a contactor is closely related to its closing stability. The distance between the moving and stationary contacts when they are separated significantly affects the closing stability of the contactor. An overvoltage suppressor is used in the contactor control circuit as a component of the contactor, connected in parallel with the contactor's electromagnetic coil. It absorbs the reverse electromotive force generated when the coil is de-energized, and a light-emitting diode indicates the status of the absorbed reverse electromotive force.

[0030] Conventional overvoltage suppressor structures incorporate a variable impedance material into the device structure. This variable impedance material electrically connects a signal electrode to a ground electrode. When the overvoltage suppressor is within its normal operating voltage range, the variable impedance material is in a high impedance state. At this time, the voltage and current on the signal electrode are not transferred to the ground electrode. However, when an abnormal overvoltage surge occurs on the signal electrode, the variable impedance material's characteristics cause it to transition to a low impedance state. At this point, the surge energy is transferred from the signal electrode through the variable impedance material to the ground electrode and discharged to ground. Therefore, the characteristics of the variable impedance material maintain the voltage on the signal electrode within a range that will not damage the circuit, thereby achieving the purpose of circuit protection.

[0031] However, the stability of existing overvoltage suppressors used in contactors still needs to be improved.

[0032] Based on this, the present application provides an overvoltage suppressor for contactors, which has a compact structure and is easy to install and connect to external wiring. After the contactor coil control power supply voltage is disconnected, it can absorb the reverse electromotive force generated by the contactor coil. At the same time, a light-emitting diode indicates the operating status, protecting the contactor coil and improving contactor reliability.

[0033] Next, the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems will be described in detail through embodiments and in conjunction with the accompanying drawings. The various embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them.

[0034] Figure 1 This is a schematic diagram of the electrical principle of an overvoltage suppressor for a contactor shown in an exemplary embodiment of the present application. Figure 2 FIG1 is a schematic cross-sectional view of a cross-sectional structure of an overvoltage suppressor for a contactor according to an exemplary embodiment of the present application. Figure 3FIG1 is a partial three-dimensional structural diagram of another overvoltage suppressor for a contactor shown in an exemplary embodiment of the present application. Figure 4 It is a partial three-dimensional structural diagram of another overvoltage suppressor for a contactor shown in an exemplary embodiment of the present application.

[0035] In an exemplary embodiment, Figure 1 and Figure 2 As shown, an overvoltage suppressor for a contactor is provided, the device comprising a first resistor 1, a light emitting diode 2, a surge absorption diode 3, a second resistor 4, a diode 5, a protective shell 8 and a printed circuit board assembly 9;

[0036] The first resistor 1, the second resistor 4, the diode 5, the light emitting diode 2 and the surge absorption diode 3 are all fixedly arranged on the printed circuit board assembly 9;

[0037] The printed circuit board assembly 9 is disposed in the protective shell 8 .

[0038] In one possible implementation, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, its specific installation structure includes a first resistor 1, a light-emitting diode 2, a surge absorber diode 3, a second resistor 4, a diode 5, a protective shell 8, a printed circuit board assembly 9, a fastener 10, and an insulating plate 11. All electronic components are welded to the printed circuit board assembly 9, and the printed circuit board assembly 9 is fixed in the protective shell 9 with the fastener 10. The bottom of the protective shell 9 is sealed and insulated with an insulating plate 11.

[0039] Specifically, the diode 5 is connected in series with the surge absorption diode 2 and the second resistor 4, the light-emitting diode 2 is connected in series with the first resistor 1, and is connected in parallel with the surge absorption diode 3. The negative end of the diode 5 is connected to the positive pole 6 of the DC control power supply, and one end of the second resistor 4 is connected to the negative pole 7 of the DC control power supply.

[0040] As can be seen, the contactor overvoltage suppressor provided in the embodiments of the present application has a compact structure and is easy to install and connect to external wiring. When the contactor coil control power supply voltage is disconnected, it can absorb the reverse electromotive force generated by the contactor coil. A light-emitting diode indicates the operating status, protecting the contactor coil and improving contactor reliability.

[0041] It should be understood that, although the various steps in the flowcharts involved in the above-described embodiments are displayed in sequence according to the instructions, these steps are not necessarily executed in the order indicated. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0042] The specific definitions of the contactor overvoltage suppressor and operating method can be found in the definitions of the contactor overvoltage suppressor and operating method described above and will not be further elaborated here. Each module in the contactor overvoltage suppressor and operating method described above can be implemented in whole or in part through software, hardware, or a combination thereof. Each of these modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a computer device memory in software form, allowing the processor to call and execute the corresponding operations of each module.

[0043] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The embodiments described above merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An overvoltage suppressor for a contactor, characterized in that: It includes a first resistor, a light emitting diode, a surge absorber diode, a second resistor, a diode, a protective shell and a printed circuit board assembly; The first resistor, the second resistor, the diode, the light emitting diode and the surge absorber diode are all fixedly arranged on the printed circuit board assembly; The printed circuit board assembly is arranged in the protective shell.

2. The overvoltage suppressor for contactor according to claim 1, characterized in that: The diode is connected in series with the surge absorption diode and the second resistor.

3. The overvoltage suppressor for contactor according to claim 2, characterized in that: The light emitting diode is connected in series with the first resistor and in parallel with the surge absorption diode.

4. The overvoltage suppressor for contactor according to claim 3, characterized in that: The negative end of the diode is connected to the positive electrode of the DC control power supply, and one end of the second resistor is connected to the negative electrode of the DC control power supply.

5. The overvoltage suppressor for contactor according to claim 4, characterized in that: A fastener is installed in the protective shell, and the printed circuit board assembly is fixed in the protective shell through the fastener.

6. The overvoltage suppressor for contactor according to claim 5, characterized in that: An insulating plate is further provided at the bottom of the protective shell, and the protective shell is sealed and insulated by the insulating plate.

7. The overvoltage suppressor for contactor according to claim 5, characterized in that: The fasteners are two fastening bolts and screw holes.

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