Control circuit of direct current contactor and direct current contactor

Abstract

The invention provides a control circuit of a direct-current contactor and the direct-current contactor, and belongs to the field of low-voltage electric appliances. The control circuit comprises a power supply module, a positive and negative electricity switching module, a unipolar module, a rotating coil module and other coil modules. The positive electrode of the power supply module is connected with the first input end of the positive and negative electricity switching module and the input end of the unipolar module, and the negative electrode of the power supply module is connected with the second input end of the positive and negative electricity switching module and the second input end of the rotating coil module. The output end of the unipolar module is connected with the first input end of the rotating coil module and the output end of the rotating coil module, and the output end of the positive and negative electricity switching module is connected with other coil modules. Wherein the other coil modules comprise a starting coil module and a holding coil module, and the positive and negative electricity switching module can switch polarities of input electric signals of the starting coil module and the holding coil module. According to the invention, an effect of realizing a two-path switching function of the direct current contactor can be achieved.

Description

Technical Field

[0001] The present application relates to the field of low-voltage electrical appliances, and in particular to a control circuit of a DC contactor and a DC contactor. Background Art

[0002] In recent years, various DC contactors have been widely used in the field of new energy, such as charging and discharging systems of charging piles, charging and discharging systems of new energy vehicles, etc. In order to improve the resource utilization of the entire system, it is necessary to improve the response speed and stability of the control circuit of the DC contactor to ensure the normal operation of the DC contactor.

[0003] In the related art, a control circuit of a DC contactor is proposed, including: a shell assembly and a static contact mechanism, a dynamic contact mechanism, an electromagnetic system and a circuit module arranged in the shell assembly, wherein the electromagnetic system includes a driving contact mechanism, a starting coil that contacts or separates from the contact mechanism, and a holding coil connected in series with the starting coil, a first controllable element in a first control circuit in the circuit module is connected in parallel at both ends of the holding coil, the control end of the first controllable element is connected to a delay circuit, the delay circuit controls the conduction of the first controllable element, and controls the on and off of the holding coil.

[0004] However, the DC contactor in the related art lacks a rotating coil module, so that the DC contactor cannot realize the two-way switching function. Summary of the invention

[0005] The purpose of the present application is to provide a control circuit of a DC contactor and a DC contactor, which can achieve the effect of enabling the DC contactor to realize a two-way switching function.

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

[0007] In a first aspect of an embodiment of the present application, a control circuit of a DC contactor is provided, comprising: a power supply module, a forward and reverse power switching module, a unipolar module, a rotating coil module and other coil modules;

[0008] The positive pole of the power supply module is respectively connected to the first input end of the positive and negative power switching module and the input end of the unipolar module, the negative pole of the power supply module is respectively connected to the second input end of the positive and negative power switching module and the second input end of the rotating coil module, the output end of the unipolar module is respectively connected to the first input end of the rotating coil module and the output end of the rotating coil module, and the output end of the positive and negative power switching module is connected to other coil modules.

[0009] As a possible implementation, other coil modules include: a starting coil module and a holding coil module;

[0010] The input end of the starting coil module is connected to the output end of the forward and reverse power switching module, the output end of the starting coil module is connected to the input end of the holding coil module, and the output end of the holding coil module is grounded;

[0011] Alternatively, the input end of the starting coil module and the input end of the holding coil module are both connected to the output end of the forward and reverse power switching module, and the output end of the starting coil module is connected to the output end of the holding coil module and grounded.

[0012] As a possible implementation manner, the rotating coil module includes: a first controllable element, a first delay circuit, a rotating coil and at least one first voltage stabilizing circuit.

[0013] As a possible implementation manner, the starting coil module includes: a second controllable element, a second delay circuit, a starting coil and at least one second voltage stabilizing circuit.

[0014] As a possible implementation manner, the holding coil module includes: a third controllable element, a holding coil, and at least one third voltage stabilizing circuit.

[0015] As a possible implementation, the control circuit of the DC contactor further includes: a detection module, one end of the detection module is connected to the control end of the third controllable element, and the other end of the detection module is used to access an external control signal.

[0016] As a possible implementation, the control circuit of the DC contactor further includes: one end of the surge protection module is connected to the positive electrode of the power module, and the other end of the surge protection module is connected to the negative electrode of the power module.

[0017] As a possible implementation, the control circuit of the DC contactor further includes: a quick response module, the other end of the holding coil is also connected to one end of the quick response module, and the other end of the quick response module is connected to one end of the holding coil.

[0018] As a possible implementation method, the power supply module is used to supply power to the control circuit, the forward and reverse power switching module switches the polarity of the input electrical signals of other coil modules based on the output signal of the power supply module, the unipolar module is used to prevent the input electrical signals of the rotating coil module from being reversed, the rotating coil module is used to drive the rotational movement of the contact contacts of the DC contactor, and the other coil modules are used to drive the contact contacts to move up and down and maintain the magnetization state of the iron core in the DC contactor.

[0019] According to a second aspect of the embodiments of the present application, a DC contactor is provided. The DC contactor includes the control circuit and contact module of the DC contactor described in the first aspect. The contact module includes a contact contact, an iron core, an armature and a moving shaft.

[0020] The beneficial effects of the embodiments of the present application include:

[0021] The embodiment of the present application provides a control circuit of a DC contactor, the control circuit of the DC contactor includes a power module, a positive and negative power switching module, a unipolar module, a rotating coil module and other coil modules, wherein the power module supplies power to the control circuit of the DC contactor, the positive output signal of the power module is input to the first input end of the rotating coil module via the unipolar module, the second input end of the rotating coil module is used to receive the negative electrical signal of the power module and is grounded, the rotating coil module itself forms a closed loop, the rotating coil module works independently based on the electrical signal input by the power module, the working state of the rotating coil module is not affected by the working state of other coil modules, and the rotating coil module is used to control the rotational movement of the contact contact of the DC contactor; the output signal of the power module is input to other coil modules via the positive and negative power switching module, and the positive and negative power switching module enables the DC contactor to support positive and negative control logic and realize the function of two-way switching. In this way, the effect of enabling the DC contactor to realize the function of two-way switching can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a DC contactor provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of a control circuit of a first DC contactor provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of another coil module provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of another coil module provided in an embodiment of the present application;

[0027] Figure 5 A schematic structural diagram of a rotating coil module provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the structure of a starting coil module provided in an embodiment of the present application;

[0029] Figure 7 A schematic diagram of the structure of a holding coil module provided in an embodiment of the present application;

[0030] Figure 8 A positive logic timing diagram provided in an embodiment of the present application;

[0031] Fig. 9 An inverse logic timing diagram provided for an embodiment of the present application;

[0032] Fig.10 A schematic diagram of the structure of a control circuit of a second DC contactor provided in an embodiment of the present application;

[0033] Fig.11 A schematic diagram of the structure of a control circuit of a third DC contactor provided in an embodiment of the present application;

[0034] Fig.12 A schematic structural diagram of a control circuit of a fourth DC contactor provided in an embodiment of the present application;

[0035] Fig.13 A working principle diagram of a control circuit of a DC contactor provided in an embodiment of the present application.

[0036] Reference numerals: 10: control circuit; 100: power module; 101: unipolar module; 102: rotating coil module; 1021: first controllable element; 1022: first delay circuit; 1023: rotating coil; 1024: first voltage stabilizing circuit; 103: positive and negative power switching module; 104: other coil modules; 1041: starting coil module; 10411: second controllable element; 10412: second delay circuit; 10413 : Starting coil; 10414: Second voltage stabilizing circuit; 1042: Holding coil module; 10421: Third controllable element; 10422: Holding coil; 10423: Third voltage stabilizing circuit; 105: Detection module; 106: Surge protection module; 107: Quick response module; 20: DC contactor; 30: Contact module; 301: Contact contact; 302: Iron core; 303: Armature; 304: Moving shaft; 305: Yoke ring. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] At present, the control circuit of the traditional DC contactor includes a housing assembly and a static contact mechanism, a dynamic contact mechanism, an electromagnetic system and a circuit module arranged in the housing group, wherein the electromagnetic system includes a driving contact mechanism, a starting coil and a holding coil, the starting coil is directly in contact with or separated from the contact mechanism, and the starting coil is connected in series with the holding coil, and the circuit module includes a first control circuit, the first control circuit includes a first controllable element, the first controllable element is connected in parallel at both ends of the holding coil, and the control end of the first controllable element is connected to one end of the delay cut-off circuit, when the electromagnetic system is powered on, the voltage in the control circuit of the DC contactor changes rapidly, and the delay cut-off circuit turns on the first controllable element, so that the holding coil is short-circuited; when the electromagnetic system is powered on for a period of time, the voltage in the control circuit of the DC contactor changes less, and the delay cut-off circuit cuts off the first controllable element, so that the holding coil is connected in series with the starting coil, and the short-circuit state of the holding coil is released by the first control circuit. Based on this, the power conversion of the electromagnetic system of the DC contactor does not need to be linked to the mechanical structure of the main circuit of the DC contactor. However, this solution lacks a rotating coil module, which makes the DC contactor unable to realize the function of two-way switching.

[0044] To this end, an embodiment of the present application provides a control circuit for a DC contactor, which control circuit includes a power supply module, a forward and reverse power switching module, a unipolar module, a rotating coil module and other coil modules, wherein the other coil modules include a starting coil module and a holding coil module, the starting coil module and the holding coil module can be connected in series or in parallel, the forward and reverse power switching module switches the polarity of the input electrical signals of the starting coil module and the holding coil module based on the output signal of the power supply module, the unipolar module is used to prevent the input electrical signal of the rotating coil module from being reversed, the rotating coil module is used to drive the rotational movement of the contact contacts of the DC contactor, the starting coil module is used to drive the up and down direct movement of the contact contacts, the holding coil is used to keep the DC contactor in an open state, and the addition of the forward and reverse power switching module makes the DC contactor suitable for positive and negative logic circuits, so that the DC relay can realize the function of two-way switching.

[0045] The control circuit of the DC contactor and the DC contactor provided in the embodiments of the present application are explained in detail below.

[0046] Figure 1 A schematic diagram of the structure of a DC contactor provided in an embodiment of the present application is shown in FIG. Figure 1 The DC contactor 20 provided in the embodiment of the present application includes: a control circuit 10 and a contact module 30, wherein the contact module 30 includes a contact contact 301, an iron core 302, an armature 303, a moving shaft 304 and a yoke ring 305, and the control circuit is mainly composed of a rotating coil module 102, a starting coil module 1041 and a holding coil module 1042.

[0047] Optionally, the yoke ring 305 can provide a magnetic circuit for the rotating coil module 102, the starting coil module 1041 and the holding coil module 1042, and load the electromagnetic generated by the rotating coil module 102, the starting coil module 1041 and the holding coil module 1042 onto the iron core 302. The control circuit 10 can generate an electromagnetic response with the iron core 302 in the contact module 30, thereby driving the corresponding armature 303 and the moving shaft 304 to move. Based on the working status of the rotating coil module 102, the starting coil module 1041 and the holding coil module 1042 in the control circuit 10, the contact contact 301 is driven to enter the corresponding working state. For example, when the starting coil module 1041 enters the working state, it drives the moving shaft 304 to move up and down, thereby driving the contact contact 301 to move up and down, completing the attraction of the contact contact 301 and the armature 303; for example, when the rotating coil module 102 enters the working state, it drives the moving shaft 304 to rotate left and right, thereby driving the contact contact 301 to rotate left and right.

[0048] Optionally, the DC contactor 20 is a switching electrical device for controlling the on and off of current in a DC circuit. The DC contactor 20 may also be called a conjugate integrated switch. The DC contactor 20 may include a contact contact, or the DC contactor 20 may include multiple contact contacts, wherein the multiple contact contacts include a main contact contact and multiple auxiliary contact contacts, each contact contact corresponds to a contact point, and under the action of the rotating coil module 102, the starting coil module 1041 and the holding coil module 1042, an electromagnetic force is generated on the iron core in the DC contactor 20, thereby driving the contact contacts of the DC contactor 20 to be on and off.

[0049] Figure 2 The schematic diagram of the control circuit of the first DC contactor provided in the embodiment of the present application is shown in FIG. Figure 2 The control circuit 10 of the DC contactor 20 provided in the embodiment of the present application includes: a power supply module 100, a forward and reverse power switching module 103, a unipolar module 101, a rotating coil module 102 and other coil modules 104.

[0050] Optionally, the power module 100 is used to supply power to the control circuit 10 , and the power module 100 may be a direct current power supply or an alternating current power supply.

[0051] The positive pole of the power supply module 100 is respectively connected to the first input end of the positive and negative power switching module 103 and the input end of the unipolar module 101, the negative pole of the power supply module 100 is respectively connected to the second input end of the positive and negative power switching module 103 and the second input end of the rotating coil module 102, the output end of the unipolar module 101 is respectively connected to the first input end of the rotating coil module 102 and the output end of the rotating coil module 102, and the output end of the positive and negative power switching module 103 is connected to other coil modules 104.

[0052] Optionally, the first input end of the positive and negative electricity switching module 103 is used to receive the positive electrical signal of the power module 100, the second input end of the positive and negative electricity switching module 103 is used to receive the negative electrical signal of the power module 100, and the output end of the positive and negative electricity switching module 103 is connected to other coil modules 104. If the first input end of the positive and negative electricity switching module 103 is turned on under the action of the positive electrical signal of the power module 100, the output end of the positive and negative electricity switching module 103 outputs a positive electrical signal, and the electrical signal flowing through other coil modules 104 is a positive electrical signal; if the second input end of the positive and negative electricity switching module 103 is turned on under the action of the negative electrical signal of the power module 100, the output end of the positive and negative electricity switching module 103 outputs a negative electrical signal, and the electrical signal flowing through other coil modules 104 is a negative electrical signal. The positive and negative electricity switching module 103 can switch the polarity of the input electrical signal of other coil modules 104. It is worth noting that the forward and reverse power switching module 103 can be a rectifier bridge or other electric polarity switching elements. This application takes the forward and reverse power switching module 103 as an example of a rectifier bridge, but it does not mean that the forward and reverse power switching module 103 can only be a rectifier bridge. This application does not make any specific limitation on this.

[0053] It is worth noting that the rectifier bridge is composed of four diodes, and the rectifier bridge has unidirectional conductivity. For example, when the first input end of the rectifier bridge is turned on, the second input end of the rectifier bridge is cut off; when the second input end of the rectifier bridge is turned on, the first input end of the rectifier bridge is cut off.

[0054] As an optional implementation, if the positive and negative power switching module 103 is a rectifier bridge, the first input end of the rectifier bridge is connected to the positive pole of the power module 100, the second input end of the rectifier bridge is connected to the negative pole of the power module 100, and the output end of the rectifier bridge is connected to other coil modules 104. The rectifier bridge changes the polarity of the input electrical signal of other coil modules 104 based on the conduction characteristics of the input end.

[0055] Optionally, the input end of the unipolar module 101 is connected to the positive pole of the power module 100, and the output end of the unipolar module 101 is connected to the first input end of the rotating coil module 102. That is, the positive pole electrical signal output by the power module 100 is input to the first input end of the rotating coil module 102 via the unipolar module 101. The unipolar module 101 can effectively prevent the input electrical signal of the rotating coil module 102 from being reversely connected, so that the positive pole electrical signal of the power module 100 can only be input from the first input end of the rotating coil module 102. The second input end of the rotating coil module 102 is used to receive the negative pole electrical signal of the power module 100, so that the rotating coil module 102 forms an independent closed loop, so that the working state of the rotating coil module 102 is not affected by the working state of other coil modules 104, and the rotating coil module 102 is used to drive the rotation of the contact contact of the DC contactor 20. It is worth noting that the unipolar module 101 can be a diode or other unidirectionally conductive electronic components. This application takes the unipolar module 101 as an example of a diode, but it does not mean that the unipolar module 101 can only be a diode. This application does not make any specific limitation on this.

[0056] As an optional implementation, if the unipolar module 101 is a first diode, the input end of the first diode is connected to the positive pole of the power module 100, and the output end of the first diode is connected to the first input end of the rotating coil module 102 and the output end of the rotating coil module 102. The first diode enables the positive output electrical signal of the power module 100 to flow only from the power module 100 to the rotating coil module 102, so that the working state of other coil modules 104 is not affected by the output electrical signal of the rotating coil module 102.

[0057] Optionally, the output end of the rotating coil module 102 is also connected to the output end of the unipolar module 101, and the electrical signal input to the first input end of the rotating coil module 102 is changed based on the output electrical signal of the rotating coil module 102, so that the working state of the rotating coil module 102 changes.

[0058] In an embodiment of the present application, the control circuit of the DC contactor includes a power module, a positive and negative power switching module, a unipolar module, a rotating coil module and other coil modules, wherein the power module supplies power to the control circuit of the DC contactor, the positive output signal of the power module is input into the first input end of the rotating coil module via the unipolar module, the second input end of the rotating coil module is used to receive the negative electrical signal of the power module and is grounded, the rotating coil module itself forms a closed loop, the rotating coil module works independently based on the electrical signal input by the power module, the working state of the rotating coil module is not affected by the working state of other coil modules, and the rotating coil module is used to control the rotational movement of the contact contact of the DC contactor; the output signal of the power module is input into other coil modules via the positive and negative power switching module, and the positive and negative power switching module enables the DC contactor to support positive and negative control logic and realize the function of two-way switching. In this way, the effect of enabling the DC contactor to realize the function of two-way switching can be achieved.

[0059] As an optional implementation, the starting coil module 1041 and the holding coil module 1042 can be connected in series or in parallel. Figure 3 and Figure 4 , the other coil modules 104 provided in the present application include: a starting coil module 1041 and a holding coil module 1042 .

[0060] Figure 3 A schematic diagram of a structure in which a starting coil module 1041 and a holding coil module 1042 are connected in series is provided in an embodiment of the present application. Figure 3 The input end of the starting coil module 1041 is connected to the output end of the forward and reverse power switching module 103, the output end of the starting coil module 1041 is connected to the input end of the holding coil module 1042, and the output end of the holding coil module 1042 is grounded.

[0061] Optionally, the starting coil module 1041 is mainly used to control the closing and opening of the contact contacts of the DC contactor 20, and the holding coil module 1042 is used to maintain the magnetization state of the iron core in the DC contactor 20 after the iron core is powered off.

[0062] Optionally, the input end of the starting coil module 1041 is connected to the output end of the forward and reverse electricity switching module 103, and the output end of the starting coil module 1041 is connected to the input end of the holding coil module 1042, that is, the starting coil module 1041 and the holding coil module 1042 are connected in series, the starting coil module 1041 receives the electrical signal output by the forward and reverse electricity switching module 103, and enters a corresponding working state based on the electrical signal output by the forward and reverse electricity switching module 103, and the holding coil module 1042 enters a corresponding working state based on the electrical signal output by the starting coil module 1041.

[0063] It is worth noting that point 1 and point 2 are points of the same potential, and the electrical signal magnitude and electrical polarity of point 1 and point 2 are the same.

[0064] Figure 4 A schematic diagram of a structure in which a starting coil module 1041 and a holding coil module 1042 are connected in parallel is provided in an embodiment of the present application. Figure 4 The input end of the starting coil module 1041 and the input end of the holding coil module 1042 are both connected to the output end of the forward and reverse power switching module 103, and the output end of the starting coil module 1041 is connected to the output end of the holding coil module 1042 and grounded.

[0065] Optionally, the input end of the starting coil module 1041 and the input end of the holding coil module 1042 are both connected to the output end of the forward and reverse power switching module 103, and the output end of the starting coil module 1041 is connected to the output end of the holding coil module 1042, that is, the starting coil module 1041 and the holding coil module 1042 are connected in parallel, and the starting coil module 1041 and the holding coil module 1042 both receive the electrical signal output by the forward and reverse power switching module 103, and enter the corresponding working state based on the electrical signal output by the forward and reverse power switching module 103, so as to maximize the resource utilization of the DC contactor 20.

[0066] As an optional implementation, the rotating coil module 102 provided in the embodiment of the present application includes: a first controllable element 1021, a first delay circuit 1022, a rotating coil 1023 and at least one first voltage stabilizing circuit 1024.

[0067] Optionally, the rotating coil 1023 is used to convert the input electrical signal into inductance, thereby driving the corresponding iron core in the DC contactor 20 to generate electromagnetic induction, so as to drive the contact contacts of the DC contactor 20 to rotate; the first delay circuit 1022 is used to delay the conduction or cut off the working state of the rotating coil 1023 according to the power-on state of the control circuit 10 of the DC contactor 20. The first delay circuit 1022 can improve the working accuracy of the rotating coil module 102, and the first delay circuit 1022 can also discharge the excess charge of the input signal of the rotating coil 1023.

[0068] Optionally, multiple first voltage stabilizing circuits 1024 are used to filter out ripples in the electrical signal in the rotating coil module 102 to improve the working stability of the rotating coil module 102. The first controllable element 1021 is turned on or off based on the output electrical signal of the first delay circuit 1022 and multiple first voltage stabilizing circuits 1024, thereby controlling the input electrical signal of the rotating coil 1023.

[0069] It is worth noting that the first controllable element 1021 can be a controllable switch, such as a P-type metal oxide semiconductor transistor or an N-type metal oxide semiconductor transistor, and the first delay circuit 1022 can be an RC circuit or other delay circuits. The present application takes the first controllable element 1021 as an N-type metal oxide semiconductor transistor and the first delay circuit 1022 as an RC circuit as an example, but it does not mean that the first controllable element 1021 of the present application can only be an N-type metal oxide semiconductor transistor and the first delay circuit 1022 can only be an RC circuit. The present application does not make specific limitations on this.

[0070] Optionally, an N-type metal oxide semiconductor transistor (N-Metal-Oxide-Semiconductor, referred to as NMOS transistor) is hereinafter referred to as an NMOS transistor.

[0071] Figure 5 A schematic diagram of a rotating coil module provided in an embodiment of the present application is shown in FIG. Figure 5 In the embodiment of the present application, the rotating coil module 102 includes two first voltage stabilizing circuits 1024 as an example.

[0072] Optionally, the first input end of the first first voltage stabilizing circuit 1024 is connected to the output end of the unipolar module 101, the output end of the first first voltage stabilizing circuit 1024 is connected to the input end of the first delay circuit 1022, the output end of the first delay circuit 1022 is connected to the first input end of the second first voltage stabilizing circuit 1024, the output end of the second first voltage stabilizing circuit 1024 is connected to the control end of the first controllable element 1021, the output end of the first controllable element 1021 is connected to one end of the rotating coil 1023, the other end of the rotating coil 1023 is connected to the output end of the unipolar module 101, the second input end of the first first voltage stabilizing circuit 1024, the second input end of the second first voltage stabilizing circuit 1024 and the input end of the first controllable element 1021 are all connected to the negative pole of the power supply module 100 and grounded.

[0073] Optionally, the unipolar module 101 inputs the positive electrical signal output by the power module 100 into the first first voltage stabilizing circuit 1024, the first first voltage stabilizing circuit 1024 filters the input positive electrical signal and inputs it into the first delay circuit 1022, the first delay circuit 1022 inputs the delayed electrical signal into the control end of the first controllable element 1021 via the second first voltage stabilizing circuit 1024 to control the on and off of the first controllable element 1021, the second input end of the first first voltage stabilizing circuit 1024, the second input end of the second first voltage stabilizing circuit 1024 and the input end of the first controllable element 1021 are all connected to the negative pole of the power module 100 and grounded, so that the rotating coil module 102 forms a closed loop, thereby ensuring that the working state of the rotating coil module 102 is not affected by other components.

[0074] Optionally, the first delay circuit 1022 is used to discharge excess charge of the input signal of the rotating coil 1023, and can also delay cutting off the electrical signal of the rotating coil 1023 based on the change of the output electrical signal of the first first voltage stabilizing circuit 1024, thereby improving the working accuracy of the rotating coil 1023.

[0075] In the embodiment of the present application, a first delay circuit, a first controllable element, a rotating coil, and a plurality of first voltage stabilizing circuits are integrated in the rotating coil module, wherein the first delay circuit delays cutting off the electric signal of the rotating coil based on the change of the output electric signal of the first first voltage stabilizing circuit, which can improve the working accuracy of the rotating coil and discharge the excess charge of the input signal of the rotating coil, thereby improving the working accuracy of the rotating coil module. In this way, the resource utilization efficiency of the DC contactor electromagnetic system can be improved.

[0076] As an optional implementation, the starting coil module 1041 provided in the embodiment of the present application includes: a second controllable element 10411, a second delay circuit 10412, a starting coil 10413 and at least one second voltage stabilizing circuit 10414.

[0077] Optionally, the starting coil 10413 is used to convert the input electrical signal into inductance, thereby driving the corresponding iron core in the DC contactor 20 to generate electromagnetic induction, so as to drive the contact contacts of the DC contactor 20 to move up and down, thereby completing the attraction of the contact contacts of the DC contactor 20; the second delay circuit 10412 is used to delay the conduction or cut off of the working state of the starting coil 10413 according to the power-on state of the control circuit 10 of the DC contactor 20. The second delay circuit 10412 can improve the working accuracy of the starting coil module 1041, and the second delay circuit 10412 can also discharge the excess charge of the input signal of the starting coil 10413.

[0078] Optionally, multiple second voltage stabilizing circuits 10414 are used to filter out ripples in the electrical signal in the starting coil module 1041 to improve the working stability of the starting coil module 1041. The second controllable element 10411 is turned on or off based on the output electrical signal of the second delay circuit 10412 and the multiple second voltage stabilizing circuits 10414, thereby controlling the input electrical signal of the starting coil 10413.

[0079] It is worth noting that the second controllable element 10411 can be a controllable switch, such as a P-type metal oxide semiconductor transistor or an N-type metal oxide semiconductor transistor, and the second delay circuit 10412 can be an RC circuit or other delay circuits. The present application takes the second controllable element 10411 as an N-type metal oxide semiconductor transistor and the second delay circuit 10412 as an RC circuit as an example, but it does not mean that the second controllable element 10411 of the present application can only be an N-type metal oxide semiconductor transistor and the second delay circuit 10412 can only be an RC circuit. The present application does not make specific limitations on this.

[0080] Figure 6 A schematic diagram of the structure of a starting coil module provided in an embodiment of the present application is shown in FIG. Figure 6 In the embodiment of the present application, the starting coil module 1041 includes: two second voltage stabilizing circuits 10414, and the starting coil module 1041 and the holding coil module 1042 are connected in parallel.

[0081] Optionally, the first input end of the first second voltage stabilizing circuit 10414 is connected to the output end of the forward and reverse power switching module 103, the output end of the first second voltage stabilizing circuit 10414 is connected to the input end of the second delay circuit 10412, the output end of the second delay circuit 10412 is connected to the first input end of the second second voltage stabilizing circuit 10414, the output end of the second second voltage stabilizing circuit 10414 is connected to the control end of the second controllable element 10411, the output end of the second controllable element 10411 is connected to one end of the starting coil 10413, the other end of the starting coil 10413 is connected to one end of the holding coil module 1042, and the second input end of the first second voltage stabilizing circuit 10414, the second input end of the second second voltage stabilizing circuit 10414 and the input end of the second controllable element 10411 are all grounded.

[0082] Optionally, the forward and reverse power switching module inputs the electrical signal output by the power module 100 into the first second voltage stabilizing circuit 10414, the first second voltage stabilizing circuit 10414 filters the input electrical signal and inputs it into the second delay circuit 10412, and the second delay circuit 10412 inputs the delayed electrical signal into the control end of the second controllable element 10411 via the second second voltage stabilizing circuit 10414 to control the on and off of the second controllable element 10411.

[0083] Optionally, the second delay circuit 10412 is used to discharge excess charge of the input signal of the starting coil 10413, and can also delay cutting off the electrical signal of the starting coil 10413 based on the change of the output electrical signal of the first second voltage stabilizing circuit 10414, thereby improving the working accuracy of the starting coil 10413.

[0084] In the embodiment of the present application, the second delay circuit, the second controllable element, the start coil and multiple second voltage stabilizing circuits are integrated in the rotating coil module, wherein the second delay circuit delays cutting off the electric signal of the start coil based on the change of the output electric signal of the first second voltage stabilizing circuit, which can improve the working accuracy of the start coil and discharge the excess charge of the input signal of the start coil, thus improving the working accuracy of the start coil module. In this way, the resource utilization efficiency of the DC contactor electromagnetic system can be improved.

[0085] As an optional implementation, the holding coil module 1042 provided in the embodiment of the present application includes: a third controllable element 10421 , a holding coil 10422 and at least one third voltage stabilizing circuit 10423 .

[0086] Optionally, the holding coil 10422 is used to convert the input electrical signal into inductance, thereby driving the corresponding iron core in the DC contactor 20 to generate electromagnetic induction, thereby maintaining the magnetic flux state of the DC contactor 20; multiple third voltage stabilizing circuits 10423 are used to filter out the ripple of the electrical signal in the holding coil module 1042 to improve the working stability of the holding coil module 1042, and the third controllable element 10421 is turned on or off based on the output electrical signal of the multiple third voltage stabilizing circuits 10423, thereby controlling the input electrical signal of the holding coil 10422.

[0087] It is worth noting that the third controllable element 10421 can be a controllable switch, such as a P-type metal oxide semiconductor transistor or an N-type metal oxide semiconductor transistor. The present application uses the third controllable element 10421 as an N-type metal oxide semiconductor transistor, but it does not mean that the third controllable element 10421 of the present application can only be an N-type metal oxide semiconductor transistor. The present application does not make any specific limitation on this.

[0088] Figure 7 A schematic diagram of a holding coil module provided in an embodiment of the present application is shown in FIG. Figure 7 In the embodiment of the present application, the holding coil module 1042 includes: a third voltage stabilizing circuit 10423, and the starting coil module 1041 and the holding coil module 1042 are connected in parallel.

[0089] Optionally, the first input end of the third voltage stabilizing circuit 10423 is connected to the output end of the forward and reverse power switching module 103, the output end of the third voltage stabilizing circuit 10423 is connected to the control end of the third controllable element 10421, the output end of the third controllable element 10421 is connected to the other end of the holding coil 10422, one end of the holding coil module is connected to the other end of the starting coil 10413, and the second input end of the third voltage stabilizing circuit 10423 and the input end of the third controllable element 10421 are both grounded.

[0090] Optionally, the forward and reverse power switching module inputs the electrical signal output by the power module 100 into the third voltage stabilizing circuit 10423 , and the third voltage stabilizing circuit 10423 filters the input electrical signal and inputs it into the control end of the third controllable element 10421 to control the on and off of the third controllable element 10421 .

[0091] As an optional implementation, Figure 8 A positive logic timing diagram provided in the embodiment of the present application, see Figure 8 , the control circuit 10 of the DC contactor 20 enters the positive logic control state, and the rotating coil 1023 quickly enters the conduction state through the control of the first delay circuit 1022, the first controllable element 1021 and multiple first voltage stabilizing circuits 1024. Based on the waveform change of the output voltage of the first controllable element 1021, the inductance generated by the rotating coil 1023 within 50ms is sufficient to rotate the contact contact of the DC contactor 20 into place, and the rotating coil 1023 maintains the current rotation state for 25ms and then automatically cuts off the power; the starting coil 10413 and the holding coil 10422 are energized at the same time after the rotating coil module 102 works for a period of time (about 25ms). After the starting coil 10413 is energized for 50ms, the contact contact of the DC contactor 20 is completely attracted, the starting coil 10413 is cut off, and the holding coil 10422 is always energized to maintain the electromagnetic state of the DC contactor 20.

[0092] As an optional implementation, Fig. 9 A reverse logic timing diagram provided in the embodiment of the present application, see Fig. 9 , the control circuit 10 of the DC contactor 20 enters the reverse logic control state, the first controllable element 1021 is reversely cut off, the rotating coil 1023 is in the off state, the holding coil 10422 and the starting coil 10413 are connected in parallel and enter the power-on state at the same time, until 50ms later, the starting coil 10413 makes the contact contacts of the DC contactor 20 complete the attraction, and the starting coil 10413 is cut off, the holding coil 10422 is always energized, and the electromagnetic state of the DC contactor 20 is maintained.

[0093] It is worth noting that the above-mentioned power-on time node and power-off time node are only used as an example, and do not mean that the rotating coil 1023, the starting coil 10413 and the holding coil 10422 in the DC contactor must operate according to the time node. This application does not make specific limitations on this.

[0094] Fig.10 For the structural diagram of the control circuit of the second DC contactor provided in this application, see Fig.10 The control circuit 10 of the DC contactor provided in the present application further includes: a detection module 105. One end of the detection module 105 is connected to the control end of the third controllable element 10421, and the other end of the detection module 105 is used to access an external control signal.

[0095] Optionally, one end of the detection module 105 is connected to the control end of the third controllable element 10421, and one end of the detection module 105 serves as the output end of the detection module 105, and the other end of the detection module 105 serves as the input end of the detection module 105. The other end of the detection module 105 is used to access an external control signal. The detection module 105 can be used to detect the external control signal of the control circuit 10 of the DC contactor 20, and the detection module 105 controls the on and off of the third controllable element 10421 based on the detection result.

[0096] Optionally, the external control signal may be an output electrical signal of the power module 100 connected to the control circuit 10, or may be other control signals. The external control signal is mainly used to characterize the access status of the power module 100. The detection module 105 determines the matching degree between the access status of the current power module 100 and the working status of the coil based on the access status of the power module 100 and the working status of each coil module in the current DC contactor 20. If the access status of the current power module 100 of the DC contactor 20 is completely compatible with the working status of each coil in the DC contactor 20, it means that the DC contactor 20 is working normally; if the access status of the current power module 100 of the DC contactor 20 is not compatible with the working status of each coil in the DC contactor 20, it means that the DC contactor 20 is working abnormally, and the third controllable element 10421 is controlled to be disconnected, so that the coil module 1042 is kept stopped working.

[0097] Fig.11 The third type of control circuit diagram of the DC contactor provided in this application is shown in FIG. Fig.11 The control circuit 10 of the DC contactor provided in the present application further includes: a surge protection module 106. One end of the surge protection module 106 is connected to the positive electrode of the power module 100, and the other end of the surge protection module 106 is connected to the negative electrode of the power module.

[0098] Optionally, one end of the surge protection module 106 is connected to the positive pole of the power module 100, and the other end of the surge protection module 106 is connected to the negative pole of the power module 100. The surge protection module 106 is used to eliminate the voltage ripple of the output electrical signal of the power module 100, improve the stability of the input electrical signal of the control circuit 10, and ensure the stability of the operation of the DC contactor 20.

[0099] It is worth noting that the surge protection module 106 can be a variable resistor or other controllable components. This application takes the surge protection module 106 as a variable resistor as an example, but it does not mean that the surge protection module 106 can only be a variable resistor. This application does not make specific limitations on this.

[0100] Optionally, if the surge protection module 106 is a first variable resistor, the input electrical signal of the power module is adjusted by the first variable resistor so that the DC contactor 20 operates stably, wherein both ends of the first variable resistor do not distinguish polarity, both ends of the first variable resistor can be connected to the positive electrical signal output by the power module 100, and can also be used to connect to the negative electrical signal output by the power module 100. The two ends of the first variable resistor can be used as both input ends and output ends. The polarity of the electrical signal input to the two ends of the first variable resistor as the input end and the polarity of the output electrical signal remain consistent. For example, if one end of the first variable resistor is connected to the positive electrical signal of the power module 100, then one end of the first variable resistor outputs a positive electrical signal, and the other end of the first variable resistor is connected to the negative electrical signal of the power module 100, then the other end of the first variable resistor outputs a negative electrical signal.

[0101] As an optional implementation, if the surge protection module 106 is a first variable resistor, one end of the first variable resistor is connected to the positive pole of the power supply module 100, the other end of the first variable resistor is connected to the positive pole of the power supply module 100, one end of the first variable resistor is also connected to the input end of the unipolar module 101 and the first input end of the forward and reverse power switching module 103, and the other end of the first variable resistor is also connected to the second input end of the rotating coil module and the second input end of the forward and reverse power switching module 103.

[0102] Fig.12 The structural diagram of the control circuit of the fourth DC contactor provided in this application is shown in FIG. Fig.12 The control circuit of the DC contactor provided in the present application further includes: a fast response module 107 . The other end of the holding coil 10422 is also connected to one end of the fast response module 107 , and the other end of the fast response module 107 is connected to one end of the holding coil 10422 .

[0103] Optionally, one end of the quick response module 107 is connected to the other end of the holding coil 10422, and the other end of the quick response module 107 is also connected to one end of the holding coil 10422. The quick response module 107 is used to discharge excess charge in the holding coil 10422, so as to accelerate the iron core in the DC contactor 20 to enter the magnetized state, thereby accelerating the response speed of the DC contactor 20.

[0104] It is worth noting that the quick response module 107 can be a variable resistor or other controllable elements. This application takes the quick response module 107 as a variable resistor as an example, but it does not mean that the quick response module 107 can only be a variable resistor. This application does not make any specific limitation on this.

[0105] Optionally, if the quick response module 107 is a second variable resistor, one end of the second variable resistor is connected to the other end of the holding coil 10422, and the other end of the second variable resistor is connected to one end of the holding coil 10422. By adjusting the resistance value of the second variable resistor, the discharge speed of the excess charge of the holding coil 10422 is accelerated, thereby accelerating the response speed of the DC contactor 20.

[0106] In the embodiment of the present application, by adding a detection module, a surge protection module and a quick response module to the control circuit of the DC contactor, the resource utilization rate of the DC contactor is improved and the operation stability of the DC contactor is ensured, wherein the detection module is used to detect whether the working state of the control circuit of the DC contactor is correct, the surge protection module is used to eliminate the voltage ripple in the input electrical signal of the power module, and the quick response module is used to discharge the excess charge of the coil module in the control circuit of the DC contactor, thereby accelerating the iron core in the DC contactor to enter the magnetized state. In this way, the effect of improving the resource utilization efficiency of the electromagnetic system of the DC contactor can be achieved.

[0107] Fig.13 For a working principle diagram of a control circuit of a DC contactor provided in an embodiment of the present application, see Fig.13 The working principle of the control circuit of the DC contactor provided in the embodiment of the present application is as follows:

[0108] As an optional implementation, the present application uses a first variable resistor as a surge protection module 106, a first diode as a unipolar module 101, a rectifier bridge as a forward and reverse power switching module 103, and a second variable resistor as a fast response module 107. The rotating coil module 102 includes: a first delay circuit 1022, a first controllable element 1021, a rotating coil 1023 and two first voltage stabilizing circuits 1024. The starting coil module 1041 includes: a second delay circuit 10412, a second controllable element 10411, a starting coil 10413 and two second voltage stabilizing circuits 10414. The holding coil module includes: a third controllable element 10421, a holding coil 10422 and a third voltage stabilizing circuit 10423, wherein the first controllable element 1021, the second controllable element 10411 and the third controllable element 104 21 are respectively the first NMOS transistor, the second NMOS transistor and the third NMOS transistor, the detection module 105 includes: a first resistor, a second resistor, a first capacitor, a second diode and a third diode; the first delay circuit 1022 includes: a third resistor and a second capacitor; the second delay circuit 10412 includes: a fourth resistor and a third capacitor; the first first voltage stabilizing circuit 1024 includes: a fifth resistor, a fourth diode and a sixth resistor; the second first voltage stabilizing circuit 1024 includes: a seventh resistor, a fifth diode and a fourth capacitor; the first second voltage stabilizing circuit 10414 includes: an eighth resistor, a sixth diode and a ninth resistor; the second second voltage stabilizing circuit 10414 includes: a tenth resistor, a seventh diode and a fifth capacitor; the third voltage stabilizing circuit includes: an eleventh resistor, a twelfth resistor, an eighth diode and a sixth capacitor as an example.

[0109] One end of the first variable resistor is connected to the positive electrode of the power module 100, and is also connected to the input end of the first diode and the first input end of the rectifier bridge. The other end of the first variable resistor is connected to the negative electrode of the power module 100, and is also connected to the second input end of the rectifier bridge, the second input end of the first first voltage stabilizing circuit 1024, the second input end of the second first voltage stabilizing circuit 1024, and the source of the first NMOS transistor and grounded. The first variable resistor is used to adjust the waveform of the electrical signal output by the power module 100 of the control circuit 10 of the DC contactor 20 to ensure the working stability of the DC contactor 20. The first diode enters an on-off state based on the output signal of the first variable resistor, and the rectifier bridge enters a unidirectional conduction state based on the signal output by the first variable resistor.

[0110] It is worth noting that the negative terminal of the current bridge is used for grounding, and the positive terminal of the current bridge serves as the output terminal of the current bridge.

[0111] The output end of the first diode is respectively connected to one end of the fifth resistor and the other end of the rotating coil 1023, the other end of the fifth resistor is connected to the output end of the fourth diode, one end of the sixth resistor and one end of the second capacitor, the other end of the second capacitor is connected to one end of the third resistor, the other end of the third resistor is connected to one end of the seventh resistor, the output end of the fifth diode, one end of the fourth capacitor and the gate of the first NMOS transistor, the source of the first NMOS transistor, the other end of the fifth resistor, the input end of the fourth diode, the other end of the sixth resistor, the other end of the seventh resistor, the input end of the fifth diode and the other end of the fourth capacitor are all connected to the other end of the first variable resistor and grounded, the drain of the first NMOS transistor is connected to one end of the rotating coil 1023, the other end of the rotating coil 1023 is connected to the output end of the first diode, the third resistor and the second capacitor form a first delay circuit 1022, the third resistor can charge the second capacitor so that the voltage of the second capacitor reaches the gate turn-on voltage of the first NMOS transistor, the fifth resistor can divide the voltage and limit the current of the electrical signal input by the rotating coil module 102, the fourth diode The fifth diode and the seventh resistor are connected in parallel to keep the charge of the third capacitor in the first delay circuit 1022 unchanged, and the fifth diode and the seventh resistor are connected in parallel to speed up the discharge speed of the fourth capacitor; wherein, there is also a first parasitic diode in the first NMOS transistor, the input end of the first parasitic diode is connected to the source of the first NMOS transistor, the output end of the first parasitic diode is connected to the drain of the first NMOS transistor, the fifth resistor can limit the current flowing into the gate of the first NMOS transistor, the first parasitic diode is used to prevent the first NMOS transistor from reverse breakdown, and can export excess electrical signals, the first parasitic capacitor is used to discharge the first NMOS transistor, and the fifth diode and the seventh resistor are connected in parallel to speed up the discharge speed of the first parasitic capacitor; the source of the first NMOS transistor, the other end of the fifth resistor, the input end of the fourth diode, the other end of the sixth resistor, the other end of the seventh resistor, the input end of the fifth diode and the other end of the fourth capacitor are all connected to the other end of the first variable resistor and grounded, so that the rotating coil module 102 forms a closed loop, so that the working state of the rotating coil module 102 is not affected by other components.

[0112] The output end of the current bridge is connected to one end of the eighth resistor, the other end of the eighth resistor is respectively connected to the output end of the sixth diode, one end of the ninth resistor and one end of the third capacitor, the other end of the third capacitor is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to one end of the tenth resistor, the output end of the seventh diode, one end of the fifth capacitor and the gate of the second NMOS transistor, the source of the second NMOS transistor, the other end of the eighth resistor, the input end of the sixth diode, the other end of the ninth resistor, the other end of the tenth resistor, the input end of the seventh diode and the other end of the fifth capacitor are all grounded, the drain of the second NMOS transistor is connected to one end of the starting coil 10413, and the other end of the starting coil 10413 is connected to one end of the holding coil 10422; the fourth resistor and the third capacitor are connected in series A second delay circuit 10412 is formed, the fourth resistor can charge the third capacitor so that the voltage of the third capacitor reaches the gate conduction voltage of the second NMOS transistor, and the sixth diode and the ninth resistor are connected in parallel to accelerate the discharge speed of the third capacitor; wherein, there is also a second parasitic diode in the second NMOS transistor, the input end of the second parasitic diode is connected to the source of the second NMOS transistor, and the output end of the second parasitic diode is connected to the drain of the second NMOS transistor, the eighth resistor can limit the current flowing into the gate of the second NMOS transistor, the second parasitic diode is used to prevent the second NMOS transistor from reverse breakdown, and can export excess electrical signals, the second parasitic capacitor is used to discharge the second NMOS transistor, and the seventh diode and the eighth resistor are connected in parallel to accelerate the discharge speed of the second parasitic capacitor.

[0113] The output end of the current bridge is also connected to one end of the eleventh resistor, and the other end of the eleventh resistor is respectively connected to one end of the twelfth resistor, the output end of the eighth diode, one end of the sixth capacitor and the gate of the third NMOS transistor. The source of the third NMOS transistor, the other end of the twelfth resistor, the input end of the eighth diode and the other end of the sixth capacitor are all grounded; wherein, there is also a third parasitic diode in the third NMOS transistor, the input end of the third parasitic diode is connected to the source of the third NMOS transistor, the output end of the third parasitic diode is connected to the drain of the third NMOS transistor, the drain of the third NMOS transistor is connected to the other end of the holding coil 10422, and one end of the holding coil 10422 is connected to the other end of the starting coil 10413. The eleventh resistor is used to limit the current flowing into the gate of the third NMOS transistor, the third parasitic diode is used to prevent the third NMOS transistor from reverse breakdown, and can export excess electrical signals, the third parasitic capacitor is used to discharge the third NMOS transistor, and the twelfth resistor is connected in parallel with the eighth diode to accelerate the discharge speed of the third parasitic capacitor.

[0114] One end of the second variable resistor is connected to the other end of the holding coil 10422, and the other end of the second variable resistor is connected to one end of the holding coil 10422. The second variable resistor is used to discharge excess charge of the holding coil 10422, which can accelerate the release of the inductance of the holding coil 10422, thereby ensuring the continuity of the electromagnetic induction of the DC contactor 20.

[0115] One end of the first resistor is connected to the gate of the third NMOS transistor, the other end of the first resistor is connected to one end of the second resistor, one end of the first capacitor, the output end of the second diode, the input end of the third diode and the external control signal access end, the other end of the second resistor, the other end of the first capacitor and the input end of the second diode are all used for grounding, the output end of the third diode is used for connecting to the load, based on the connected external control signal and the working state of each coil of the control circuit 10, it is determined that the working state of each coil is consistent with the working state corresponding to the connected power supply signal, so as to ensure the working accuracy of the DC contactor 20.

[0116] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0117] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A control circuit for a DC contactor, characterized in that: include: Power module, forward and reverse power switching module, unipolar module, rotating coil module and other coil modules; The positive pole of the power supply module is respectively connected to the first input end of the forward and reverse power switching module and the input end of the unipolar module, the negative pole of the power supply module is respectively connected to the second input end of the forward and reverse power switching module and the second input end of the rotating coil module, the output end of the unipolar module is respectively connected to the first input end of the rotating coil module and the output end of the rotating coil module, and the output end of the forward and reverse power switching module is connected to the other coil modules.

2. The control circuit of the DC contactor according to claim 1, characterized in that: The other coil modules include: a starting coil module and a holding coil module; The input end of the starting coil module is connected to the output end of the forward and reverse power switching module, the output end of the starting coil module is connected to the input end of the holding coil module, and the output end of the holding coil module is grounded; Alternatively, the input end of the starting coil module and the input end of the holding coil module are both connected to the output end of the forward and reverse power switching module, and the output end of the starting coil module is connected to the output end of the holding coil module and grounded.

3. The control circuit of the DC contactor according to claim 1, characterized in that: The rotating coil module includes: a first controllable element, a first delay circuit, a rotating coil and at least one first voltage stabilizing circuit.

4. The control circuit of the DC contactor according to claim 2, characterized in that: The starting coil module includes: a second controllable element, a second delay circuit, a starting coil and at least one second voltage stabilizing circuit.

5. The control circuit of the DC contactor according to claim 2, characterized in that: The holding coil module includes: a third controllable element, a holding coil and at least one third voltage stabilizing circuit.

6. The control circuit of the DC contactor according to claim 5, characterized in that: Also includes: A detection module, one end of which is connected to the control end of the third controllable element, and the other end of which is used to access an external control signal.

7. The control circuit of the DC contactor according to any one of claims 1 to 6, characterized in that: Also includes: A surge protection module, one end of which is connected to the positive electrode of the power module, and the other end of which is connected to the negative electrode of the power module.

8. The control circuit of the DC contactor according to claim 2, characterized in that: Also includes: A quick response module, the other end of the holding coil is also connected to one end of the quick response module, and the other end of the quick response module is connected to one end of the holding coil.

9. The control circuit of the DC contactor according to claim 1, characterized in that: include: The power supply module is used to supply power to the control circuit, the forward and reverse power switching module switches the polarity of the input electrical signal of the other coil modules based on the output signal of the power supply module, the unipolar module is used to prevent the input electrical signal of the rotating coil module from being reversed, the rotating coil module is used to drive the rotational movement of the contact contact of the DC contactor, and the other coil modules are used to drive the contact contact to move up and down and maintain the magnetization state of the iron core in the DC contactor.

10. A DC contactor, characterized in that: The DC contactor comprises the control circuit and contact module according to any one of claims 1 to 9, and the contact module comprises a contact contact, an iron core, an armature and a moving shaft.

Images