A plug-in modular solid state circuit breaker

Abstract

The application discloses a plug-in modular solid-state circuit breaker, and belongs to the technical field of circuit breakers, which comprises a main loop circuit board, a main loop circuit board mounting seat, an insulating surface cover, a control loop circuit board, a control loop circuit board mounting seat, a plurality of conductive columns, a shunt and an insulating mounting base; wherein the main loop circuit board is arranged in the mounting cavity of the main loop circuit board mounting seat; the insulating surface cover is arranged in the mounting cavity of the main loop circuit board mounting seat, thereby forming a first module; one end of the plurality of conductive columns is electrically connected with the wiring terminal of the insulating mounting base; the shunt is welded with one of the conductive columns; the control loop circuit board is fixedly arranged in the mounting cavity of the control loop circuit board mounting seat, and is integrally fixed to the insulating mounting base, thereby forming a second module; and the first module is inserted into the second module. The plug-in modular solid-state circuit breaker solves the inconvenient maintenance and assembly problem of the traditional solid-state circuit breaker caused by the fact that the traditional solid-state circuit breaker is designed as an integral structure which is difficult to disassemble and assemble.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker technology, specifically relating to a pluggable modular solid-state circuit breaker. Background Technology

[0002] Circuit breakers are protective components in power transmission and distribution systems, designed to protect load lines and equipment from damage in the event of overload, short circuit, or undervoltage. Currently, traditional mechanical circuit breakers, upon detecting a fault signal, take anywhere from a few milliseconds to tens of milliseconds to mechanically open the contacts and interrupt the fault current. However, if the line contains power electronic components such as converters or inverters, requiring a very short time to disconnect the fault circuit, traditional mechanical circuit breakers become unsuitable.

[0003] With the development of power electronics technology, solid-state circuit breakers have emerged. Compared with traditional mechanical circuit breakers, they achieve control over the operating speed and accuracy of the circuit breaker through contactless switching and are widely used in various industrial control applications. However, traditional solid-state circuit breakers are often designed as an integral structure that is difficult to disassemble and assemble, which brings great inconvenience to the maintenance and assembly of solid-state circuit breakers. Summary of the Invention

[0004] In view of this, the present invention provides a pluggable modular solid-state circuit breaker, which solves the problem of inconvenient maintenance and assembly caused by the traditional solid-state circuit breaker being designed as a single, difficult-to-disassemble structure.

[0005] The present invention adopts the following technical solution:

[0006] A plug-in modular solid-state circuit breaker includes a main circuit circuit board, a main circuit circuit board mounting base, an insulating cover, a control circuit circuit board, a control circuit board mounting base, multiple conductive posts, a shunt, and an insulating mounting base.

[0007] The main circuit board is disposed in the mounting cavity of the main circuit board mounting base; the insulating cover is disposed in the mounting cavity of the main circuit board mounting base to form a first module;

[0008] One end of each of the conductive posts is electrically connected to the terminals of the insulating mounting base for power input and output; the shunt is welded to one of the conductive posts for acquiring the electrical signal of the main circuit; the control circuit circuit board is fixedly housed in the mounting cavity of the control circuit circuit board mounting base and then fixed as a whole to the insulating mounting base, and the control circuit circuit board is electrically connected to the shunt; the other end of each conductive post passes through the control circuit circuit board mounting base and extends outward to form a second module.

[0009] The first module is inserted into the second module through the outwardly extending conductive post, and the main circuit board is electrically connected to the other end of the conductive post and the control circuit board.

[0010] Furthermore, a mechanical opening and closing button switch is also provided on the insulating cover;

[0011] The mechanical opening and closing push-button switch is connected in series in the main conductive circuit of the main circuit circuit board and is used to manually disconnect the main conductive circuit.

[0012] Furthermore, an indicator light is provided on the insulating cover to indicate the operating status of the solid-state circuit breaker.

[0013] Furthermore, the shunt is U-shaped and is accommodated in the groove of the insulating mounting base.

[0014] Furthermore, the control circuit board is provided with multiple conductive pins;

[0015] The bottom of the mounting chamber of the main circuit circuit board mounting base is provided with multiple conductive pin through holes that correspond one-to-one with the positions of the conductive pins.

[0016] When the first module is inserted into the second module, the conductive pin passes through the conductive pin through hole and is electrically connected to the main circuit board, thereby making the main circuit board electrically connected to the control circuit board.

[0017] Furthermore, the main circuit circuit board is provided with conductive pin fixing holes that correspond one-to-one with the positions of the conductive pins;

[0018] The conductive needle passes through the conductive needle through hole and is then fixed to the conductive needle fixing hole.

[0019] Furthermore, the conductive needle is an elastic conductive needle.

[0020] Furthermore, the main circuit circuit board mounting base is provided with conductive post through holes corresponding to the positions of the conductive posts;

[0021] A conductive post fixing component is provided at one end of the conductive post through hole near the control circuit circuit board.

[0022] When the first module is inserted into the second module, the conductive post passes through the conductive post through hole and is electrically connected to the main circuit board, thereby making the main circuit board electrically connected to the conductive post, and the conductive post is fixed by the conductive post fixing member.

[0023] Furthermore, the fixing element is a spring clip.

[0024] Furthermore, it also includes a conductive post sleeve with internal threads;

[0025] The conductive post sleeve is embedded in the conductive post through hole, and one end near the main circuit circuit board is threadedly connected to the terminal of the main circuit circuit board.

[0026] The conductive post passes through the conductive post sleeve and is electrically connected to the terminal block of the main circuit circuit board.

[0027] Beneficial effects:

[0028] (1) The main circuit circuit board is fixedly housed in the mounting cavity of the main circuit circuit board mounting base, and the insulating cover is placed on the mounting cavity of the main circuit circuit board mounting base to form the first module. In the first module, the main circuit circuit board with high voltage is isolated from the outside world, which improves the safety performance.

[0029] One end of multiple conductive posts is electrically connected to the terminals of the insulating mounting base for power input and output; the shunt is welded to one of the conductive posts to collect the electrical signal of the main circuit; the control circuit circuit board is fixedly housed in the mounting cavity of the control circuit circuit board mounting base and is integrally fixed to the insulating mounting base, and the control circuit circuit board is electrically connected to the shunt; the other end of the conductive post passes through the control circuit circuit board mounting base and extends outward to form a second module. In the second module, the control circuit board with weak current is isolated from the outside world, protecting the control circuit board.

[0030] The first module is inserted into the second module via outwardly extending conductive posts. Thus, when the solid-state circuit breaker needs maintenance, the first module can be easily pulled out. This insertion and removal method allows the first and second modules to be quickly connected and separated, reducing the assembly and maintenance time of the solid-state circuit breaker. At the same time, the main circuit board in the first module and the control circuit board in the second module are also encapsulated in different insulating housings, achieving electrical isolation and improving the safety of the solid-state circuit breaker.

[0031] In addition, since the main circuit board and the control circuit board are electrically connected, and the control circuit board can obtain the electrical signal of the main circuit board through the shunt, it can remotely monitor and control the electrical signal of the solid-state circuit breaker through the control module and communication module on the control circuit board.

[0032] (2) A mechanical opening and closing button switch is provided on the insulating cover. The mechanical opening and closing button switch is connected in series in the main conductive circuit of the main circuit circuit board. It is used to manually disconnect the main conductive circuit during maintenance. In this way, on the basis of the solid circuit breaker having power electronic components such as thyristors to control the circuit opening and closing, the addition of a mechanical opening and closing button makes the circuit of the solid circuit breaker only conduct when both the mechanical opening and closing button and the thyristor are in the closed state. Moreover, because the opening and closing state of the mechanical opening and closing button can be directly seen at the maintenance site, the safety of the solid circuit breaker during maintenance is improved.

[0033] (3) An indicator light is provided on the insulating cover to indicate the working status of the solid circuit breaker, which can further improve the safety of the solid circuit breaker during maintenance.

[0034] (4) The shunt is U-shaped and accommodated in the groove of the insulating mounting base, which saves installation space and reduces the size of the solid circuit breaker. More solid circuit breakers can be configured on the distribution board in a small space such as the small cabin of an unmanned ship, so as to realize the power supply and distribution of more loads and improve power density.

[0035] (5) The control circuit board is equipped with multiple conductive pins, and the bottom of the mounting cavity of the main circuit board mounting base is equipped with multiple conductive pin through holes corresponding to the positions of the conductive pins. When the first module is inserted into the second module, the conductive pins pass through the conductive pin through holes and are electrically connected to the main circuit board, thereby electrically connecting the main circuit board and the control circuit board. The control circuit board and the main circuit board are electrically connected through conductive pins, ensuring the fast insertion and removal function of the solid-state circuit breaker.

[0036] (6) After the conductive needle passes through the conductive needle through hole, it is fixed in the conductive needle fixing hole, which makes the electrical connection between the main circuit board and the control circuit board more reliable.

[0037] (7) The conductive pins are elastic conductive pins, which ensure that when the first module is inserted into the second module, each conductive pin has a buffering effect with the main circuit board, which can avoid hard contact and make the conductive pins more reliable in contact with the main circuit board.

[0038] (8) A conductive post fixing component is provided at one end of the conductive post through hole near the control circuit board. The conductive post is fixed by the conductive post fixing component, which ensures that the first module can resist a certain vibration when it is inserted into the second module. Attached Figure Description

[0039] Figure 1 A three-dimensional structural schematic diagram of the pluggable modular solid-state circuit breaker provided by the present invention;

[0040] Figure 2 for Figure 1 An explosion diagram;

[0041] Among them, 1-first module, 101-insulating cover, 102-main circuit circuit board, 103-conductive pin fixing hole, 104-main circuit circuit board mounting base, 105-conductive post through hole, 106-conductive post sleeve, 107-spring clip, 108-LED indicator light, 109-rocker switch, 2-second module, 201-conductive pin, 202-control circuit circuit board, 203-control circuit circuit board mounting base, 204-conductive post, 205-U-shaped shunt, 206-insulating mounting base. Detailed Implementation

[0042] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0043] like Figure 1 As shown, a plug-in modular solid-state circuit breaker comprises a first module 1 and a second module 2, wherein:

[0044] Reference Figure 2 The main circuit board 102 is fixedly housed in the mounting cavity of the main circuit board mounting base 104; the insulating cover 101 is placed on the mounting cavity of the main circuit board mounting base 104 to form the first module 1.

[0045] After one end of a conductive post 204 is welded to a U-shaped shunt 205, two threaded holes on the flange of the U-shaped shunt 205 are threadedly connected to the power input terminal on one corner of the insulating mounting base 206. One end of the other three conductive posts 204 is not welded to the U-shaped shunt 205, but is directly electrically connected to the power input and output terminals on the other three corners of the insulating mounting base 206. The control circuit board 202 is fixed in the mounting cavity of the control circuit board mounting base 203 by screws and then fixed to the insulating mounting base 206 by screws. The control circuit board 202 is electrically connected to the U-shaped shunt 205 by wires. The other end of the conductive post 204 extends outward through the through holes at the four corners of the control circuit board mounting base 203 to form the second module 2.

[0046] The first module 1 is inserted into the second module 2 via outwardly extending conductive posts 204, forming... Figure 1 In the pluggable solid-state short circuit device, the main circuit circuit board 102 is electrically connected to the conductive post 204 and the control circuit circuit board 202.

[0047] When maintenance is required on the solid-state circuit breaker, only the first module 1 needs to be unplugged. This plug-and-play method allows for quick connection and disconnection of the first module 1 and the second module 2, reducing the assembly and maintenance time of the solid-state circuit breaker. Simultaneously, the main circuit board 102 in the first module 1 and the control circuit board 202 in the second module 2 are encapsulated in different insulating shells, achieving electrical isolation between the two and improving the safety of the solid-state circuit breaker. Furthermore, since the control circuit board 202 can obtain the current signal from the main circuit board 102 through the U-shaped shunt 205, and the main circuit board 102 and the control circuit board 202 are electrically connected, meaning the control circuit board 202 applies control signals to the main circuit board 102 through conductive pins 201, it is possible to remotely monitor and control the electrical signals of the solid-state circuit breaker through modules such as the control module and communication module on the control circuit board 202.

[0048] As an improvement, a rocker switch 109, serving as a mechanical open / close button, is also provided on the insulating cover 101 of the pluggable modular solid-state circuit breaker. The rocker switch 109 is connected in series in the main conductive circuit of the main circuit circuit board 102 for manually disconnecting the main conductive circuit during maintenance. This is equivalent to adding a mechanical open / close button to the existing circuit control circuit of the solid-state circuit breaker, which already has a switch for controlling power electronic components such as thyristors. This ensures that the main conductive circuit of the solid-state circuit breaker can only be connected when both the mechanical open / close button and the thyristor are in the open state. Because the open / closed state of the mechanical open / close button can be directly observed at the maintenance site, this avoids situations where it is not possible to directly determine whether the thyristor or other power electronic components are open or closed on-site. The rocker switch 109 allows for judgment, improving the safety of solid-state circuit breaker maintenance.

[0049] As a further improvement, the insulating cover 101 is also equipped with LED indicator lights, which can indicate the operating status of the solid-state circuit breaker through different colors. For example, green light represents closed, orange light represents standby, and red light represents fault. This allows maintenance personnel to identify errors by observing the open / closed status of the rocker switch, further enhancing the safety of the solid-state circuit breaker during maintenance.

[0050] Specifically, the U-shaped shunt 205 is housed in the groove of the insulating mounting base 206. Compared with the traditional shunt structure, this saves installation space, reduces the size of the solid-state circuit breaker, and allows for the configuration of more solid-state circuit breakers on the distribution board in confined spaces such as the small cabin of an unmanned ship, enabling power supply and distribution to more loads and increasing power density.

[0051] More specifically, such as Figure 2As shown, a row of conductive pins 201 is provided on the control circuit board 202. The bottom of the mounting cavity of the main circuit board mounting base 104 is provided with a row of conductive pin through holes (not shown) corresponding to the positions of these conductive pins 201. When the first module 1 is inserted into the second module 2, the conductive pins 201 pass through the conductive pin through holes and are electrically connected to the main circuit board 102, thereby electrically connecting the main circuit board 102 and the control circuit board 202. In this embodiment, the main circuit board 102 is provided with conductive pin fixing holes corresponding to the positions of the conductive pins 201. The conductive pins 201 pass through the conductive pin through holes and are fixed in the conductive pin fixing holes 103. This is more reliable than the conductive pins 201 achieving electrical connection through contacts on the control circuit board 202, and good contact can be maintained even under certain vibration environments.

[0052] As an improvement, in this embodiment, the conductive pin 201 is an elastic conductive pin, which ensures that when the first module 1 is inserted into the second module 2, each conductive pin 201 has a buffering effect with the main circuit circuit board 102, avoiding hard contact, protecting the main circuit circuit board 102 and the control circuit circuit board 202, and also making the conductive pin 201 and the main circuit circuit board 102 make more reliable contact.

[0053] Reference Figure 2 In this embodiment, the main circuit board mounting base 104 is provided with four conductive post through holes 105 corresponding to the positions of the conductive posts 204. A spring clip 107, which serves as a fixing member for the conductive posts 204, is provided at one end of the conductive post through hole 105 near the control circuit board 202. When the first module 1 is inserted into the second module 2, the conductive post 204 passes through the conductive post through hole 105 and is electrically connected to the main circuit board 102, thereby making the main circuit board 102 electrically connected to the conductive post 204. At this time, the conductive post 204 is clamped by the spring clip 107.

[0054] In addition, such as Figure 2 As shown, the solid-state circuit breaker also includes four conductive post sleeves 106. These four conductive post sleeves 106 have internal threads and are embedded in four conductive post through holes 105. The end closest to the main circuit board 102 is threadedly connected to the terminal of the main circuit board 102. The conductive post 204 passes through the conductive post sleeves 106 and is electrically connected to the terminal of the main circuit board 102. The structure is simple, reliable, and stable. In this embodiment, based on the conductive post sleeves 106, a spring clip 107 is fixed to the conductive post sleeves 106, avoiding the need to set up a structure for fixing the spring clip 107 on the main circuit board mounting base 104.

[0055] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A plug-in modular solid-state circuit breaker, characterized in that, Includes a main circuit board, a main circuit board mounting base, an insulating cover, a control circuit board, a control circuit board mounting base, multiple conductive posts, a shunt, and an insulating mounting base; The main circuit board is disposed in the mounting cavity of the main circuit board mounting base; the insulating cover is disposed in the mounting cavity of the main circuit board mounting base to form a first module; One end of each of the conductive posts is electrically connected to the terminals of the insulating mounting base for power input and output; the shunt is welded to one of the conductive posts for acquiring the electrical signal of the main circuit; the control circuit circuit board is fixedly housed in the mounting cavity of the control circuit circuit board mounting base and then fixed as a whole to the insulating mounting base, and the control circuit circuit board is electrically connected to the shunt; the other end of each conductive post passes through the control circuit circuit board mounting base and extends outward to form a second module. The first module is inserted into the second module through the outwardly extending conductive post, and the main circuit circuit board is electrically connected to the other end of the conductive post and the control circuit circuit board. The shunt is U-shaped and is accommodated in the groove of the insulating mounting base; The control circuit board is equipped with multiple conductive pins. The bottom of the mounting chamber of the main circuit circuit board mounting base is provided with multiple conductive pin through holes that correspond one-to-one with the positions of the conductive pins. When the first module is inserted into the second module, the conductive pin passes through the conductive pin through hole and is electrically connected to the main circuit board, thereby making the main circuit board electrically connected to the control circuit board. The main circuit circuit board is provided with conductive pin fixing holes that correspond one-to-one with the positions of the conductive pins. The conductive needle passes through the conductive needle through hole and is then fixed to the conductive needle fixing hole; The conductive needle is an elastic conductive needle; The main circuit circuit board mounting base is provided with conductive post through holes corresponding to the positions of the conductive posts. A conductive post fixing component is provided at one end of the conductive post through hole near the control circuit circuit board. When the first module is inserted into the second module, the conductive post passes through the conductive post through hole and is electrically connected to the main circuit board, thereby making the main circuit board electrically connected to the conductive post, and the conductive post is fixed by the conductive post fixing member.

2. The plug-in modular solid-state circuit breaker as described in claim 1, characterized in that, The insulating cover is also equipped with a mechanical opening and closing button switch; The mechanical opening and closing push-button switch is connected in series in the main conductive circuit of the main circuit circuit board and is used to manually disconnect the main conductive circuit.

3. The plug-in modular solid-state circuit breaker as described in claim 2, characterized in that, The insulating cover is also equipped with an indicator light to indicate the operating status of the solid-state circuit breaker.

4. The plug-in modular solid-state circuit breaker as described in claim 1, characterized in that, The fixing component is a spring clip.

5. The plug-in modular solid-state circuit breaker as described in claim 1 or 4, characterized in that, It also includes conductive post sleeves with internal threads; The conductive post sleeve is embedded in the conductive post through hole, and one end near the main circuit circuit board is threadedly connected to the terminal of the main circuit circuit board. The conductive post passes through the conductive post sleeve and is electrically connected to the terminal block of the main circuit circuit board.

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