CN216928466U - Solid-state circuit breaker and power equipment - Google Patents
Solid-state circuit breaker and power equipment Download PDFInfo
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- CN216928466U CN216928466U CN202220676495.XU CN202220676495U CN216928466U CN 216928466 U CN216928466 U CN 216928466U CN 202220676495 U CN202220676495 U CN 202220676495U CN 216928466 U CN216928466 U CN 216928466U
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Abstract
The present invention provides a solid-state circuit breaker and power equipment, the solid-state circuit breaker includes: the switch assembly is connected in the main loop in series and the control module is connected with the switch assembly in parallel; the control module is fixedly arranged below the switch component; the switch assembly comprises a main contact and a driving mechanism for driving the main contact to perform switching-on, switching-off or tripping actions; the control module comprises a control circuit and a power electronic device connected with the switch component in parallel; the solid-state circuit breaker further comprises a triggering device connected with the control circuit; the trigger device is used for triggering the control circuit to control the on-off of the power electronic device when the main contact performs switching-on, switching-off or tripping actions; the drive mechanism is mechanically associated with the trigger device. The utility model has simple structure and convenient installation, and can avoid the main contact from generating electric arc to burn out the main contact and the internal structure of the breaker, thereby prolonging the electrical service life of related devices and improving the breaking short-circuit current performance of the breaker.
Description
Technical Field
The utility model relates to the technical field of circuit breakers, in particular to a solid-state circuit breaker and power equipment.
Background
The low-voltage circuit breaker belongs to a low-voltage electrical apparatus, is widely used in a low-voltage power grid, is generally used for distributing electric energy in a main loop, and protects faults of overload, short circuit, undervoltage, grounding and the like of a power supply circuit. The molded case circuit breaker is a common low-voltage circuit breaker, and the molded case circuit breaker generally drives a main contact of the molded case circuit breaker to perform closing, opening and tripping actions through a rotating shaft by a four-bar mechanism. The main contact of the molded case circuit breaker can generate electric arc when the molded case circuit breaker is subjected to brake opening or tripping action, the electric arc can burn the main contact and the internal structure of the molded case circuit breaker, and the electric service life and the breaking short-circuit current performance of the molded case circuit breaker are directly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a solid-state circuit breaker and power equipment, which are used for preventing an electric arc generated by a main contact from burning the main contact and the internal structure of the circuit breaker, further prolonging the electrical service life of related devices and improving the breaking short-circuit current performance of the circuit breaker.
In a first aspect, an embodiment of the present invention provides a solid-state circuit breaker, including: the control module is connected in parallel with the switch assembly; the control module is fixedly arranged below the switch assembly; the switch assembly comprises a main contact and a driving mechanism for driving the main contact to perform switching-on, switching-off or tripping actions; the control module comprises a control circuit and a power electronic device connected with the switch component in parallel; the solid-state circuit breaker further comprises a triggering device connected with the control circuit; the trigger device is used for triggering the control circuit to control the on-off of the power electronic device when the main contact performs switching-on, switching-off or tripping actions; the drive mechanism is mechanically associated with the trigger device.
As a possible implementation, the driving mechanism comprises a toggle switch rotationally arranged through a rotating shaft; the trigger device comprises an actuating button; the rotating shaft is used for being separated from a driving button when the main contact performs a closing action so as to trigger the control circuit to control the power electronic device to be disconnected; the rotating shaft is used for pressing a driving button when the main contact performs opening or tripping action so as to trigger the control circuit to control the power electronic device to be conducted.
As a possible implementation, the triggering device is configured to trigger the control circuit to control the power electronic device to conduct when the main contact performs a closing action; the trigger device is used for triggering the control circuit to control the power electronic device to be disconnected when the main contact performs opening or tripping action.
As a possible implementation, the toggle switch is divided into a first gear and a second gear; the first gear corresponds to the position of the main contact after completing the switching-on action; and the second gear corresponds to the position of the main contact after the opening or tripping action is completed.
As a possible implementation, the main contact includes a fixed contact and a movable contact connected to the driving mechanism; the driving mechanism is used for driving the moving contact to be in contact with the fixed contact so as to enable the main contact to complete a switching-on action; the driving mechanism is used for driving the moving contact to be separated from the fixed contact, so that the main contact completes the action of opening or tripping.
As a possible realization, the drive mechanism further comprises a linkage mechanism; the connecting rod mechanism is connected with the moving contact; the connecting rod mechanism is used for driving the moving contact to be in contact with the fixed contact under the driving of the toggle switch so as to enable the main contact to perform a switching-on action; the link mechanism is used for driving the moving contact to be separated from the fixed contact under the driving of the toggle switch so as to enable the main contact to perform opening or tripping action.
As a possible implementation, the control module further comprises a power supply unit connected in series with the control circuit for supplying power to the control circuit.
As a possible realization, the power electronics are connected in parallel with the switching assembly by a connecting conductor; the control circuit is connected to the connection conductor.
As a possible implementation, the connection conductor is plural; the bottom surface of the switch component is provided with a clamping groove corresponding to the upper end of the connecting conductor; the control module is fixedly arranged below the switch component through the corresponding matching between the upper end of the connecting conductor and the clamping groove.
In a second aspect, embodiments of the present invention further provide a power device, where the power device includes the above solid-state circuit breaker.
The utility model provides a solid-state circuit breaker and power equipment, wherein the solid-state circuit breaker comprises: the control module is connected in parallel with the switch assembly; the control module is fixedly arranged below the switch component; the switch assembly comprises a main contact and a driving mechanism for driving the main contact to perform switching-on, switching-off or tripping actions; the control module comprises a control circuit and a power electronic device connected with the switch component in parallel; the solid-state circuit breaker further comprises a triggering device connected with the control circuit; the trigger device is used for triggering the control circuit to control the on-off of the power electronic device when the main contact performs switching-on, switching-off or tripping actions; the drive mechanism is mechanically associated with the trigger device. The utility model has simple structure and convenient installation, and can shunt current to the power electronic device when the main contact is opened or tripped, thereby avoiding the main contact generating electric arc to burn the main contact and the internal structure of the breaker, further prolonging the electrical service life of the related devices and improving the breaking short-circuit current performance of the breaker.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is an exemplary schematic diagram of a solid-state circuit breaker according to an embodiment of the present invention;
fig. 2 is a diagram illustrating an assembly structure of a solid-state circuit breaker according to an embodiment of the present invention;
fig. 3 is an exploded view of a solid-state circuit breaker according to an embodiment of the present invention;
FIG. 4 is an exemplary diagram of an exploded structure of a control module according to an embodiment of the present invention;
fig. 5 is a cross-sectional view of a solid-state circuit breaker provided in an embodiment of the present invention when a main contact is closed;
fig. 6 is a cross-sectional view of a solid-state circuit breaker according to an embodiment of the present invention when a main contact is opened;
fig. 7 is another exemplary schematic diagram of a solid-state circuit breaker according to an embodiment of the present invention.
Icon: 100-a switch assembly; 101-a rotating shaft; 102-a linkage mechanism; 10-a main contact; 103-moving contact; 104-a static contact; 120-a drive mechanism; 105-a toggle switch; 106-card slot; 130-a trigger device; 200-a control module; 201-an insulating housing; 202-power electronics; 203-connecting conductors; 204-a control circuit; 205-a power supply unit; 206-a conductor; 207-actuation button.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, when the existing molded case circuit breaker is subjected to brake opening or tripping action, a main contact of the existing molded case circuit breaker can generate electric arcs, the electric arcs can burn the main contact and the internal structure of the molded case circuit breaker, and the electric service life and the breaking short-circuit current performance of the molded case circuit breaker are directly influenced. Based on the solid-state circuit breaker and the power equipment, the main contact and the internal structure of the circuit breaker can be prevented from being burnt by electric arcs generated by the main contact, the electrical service life of related devices is prolonged, and the breaking short-circuit current performance of the circuit breaker is improved.
In order to facilitate understanding of the present invention, a description will be first given of a solid-state circuit breaker provided by an embodiment of the present invention.
Referring to fig. 1, the solid state circuit breaker includes: the switch assembly 100 is connected in series in the main loop, and the control module 200 is connected with the switch assembly 100 in parallel; the switch assembly 100 includes a main contact 10 and a driving mechanism 120 for driving the main contact 10 to perform a switching-on, switching-off or tripping operation; the control module 200 includes a control circuit 204 and power electronics 202 in parallel with the switch assembly 100; the solid state circuit breaker further comprises a triggering device 130 connected to the control circuit 204; the trigger device 130 is used for triggering the control circuit 204 to control the power electronic device 202 to be switched on or switched off when the main contact 10 performs switching-on, switching-off or tripping actions; the drive mechanism 120 is mechanically associated with a trigger device 130.
The power electronic device 202 may be an IGBT power tube, a MOSFET power tube, an NPN power tube, a thyristor, or the like, and may be selected according to actual conditions, which is not limited herein. In addition, the power electronic device 202 may be one, or a plurality of power electronic devices may be connected in parallel to improve current carrying capacity.
Taking fig. 1 as an example, the triggering device 130 is configured to trigger the control circuit 204 to control the power electronic device 202 to be turned on when the main contact 10 performs a closing operation; the triggering device 130 is used for triggering the control circuit 204 to control the power electronic device 202 to be disconnected when the main contact 10 performs an opening or tripping action.
Taking fig. 2 as an example, the control module 200 is fixedly installed below the switch assembly 100; the driving mechanism 120 comprises a toggle switch 105, and the toggle switch 105 is divided into a first gear and a second gear; the first gear corresponds to the position of the main contact 10 after completing the switching-on action; the second gear corresponds to the position of the main contact 10 after the opening or tripping operation is completed. For example, the toggle switch 105 is divided into an "ON" position (i.e., the first position) and an "OFF" position (i.e., the second position), and the main contact 10 is closed when the toggle switch 105 is in the "ON" position; the main contact 10 is tripped when the toggle switch 105 is in the "OFF" position.
The solid-state circuit breaker provided by the embodiment of the utility model comprises: the switch assembly is connected in the main loop in series and the control module is connected with the switch assembly in parallel; the control module is fixedly arranged below the switch component; the switch assembly comprises a main contact and a driving mechanism for driving the main contact to perform switching-on, switching-off or tripping actions; the control module comprises a control circuit and a power electronic device connected with the switch component in parallel; the solid-state circuit breaker further comprises a triggering device connected with the control circuit; the trigger device is used for triggering the control circuit to control the on-off of the power electronic device when the main contact performs switching-on, switching-off or tripping actions; the drive mechanism is mechanically associated with the trigger device. The solid-state circuit breaker is simple in structure and convenient and fast to install, and when the main contact is opened or tripped, current can be shunted to the power electronic device, so that the main contact is prevented from generating electric arcs to burn the main contact and the internal structure of the circuit breaker, the electrical service life of related devices is prolonged, and the breaking short-circuit current performance of the circuit breaker is improved.
As a possible implementation, referring to fig. 3 to 6, the toggle switch 105 is rotatably disposed through the rotating shaft 101; the trigger device 130 includes an actuation button 207; the rotating shaft 101 is used for disengaging from the driving button 207 when the main contact 10 performs a closing action, so as to trigger the control circuit 204 to control the power electronic device 202 to be disconnected; the rotating shaft 101 is used for pressing the driving button 207 when the main contact 10 performs an opening or tripping action, so as to trigger the control circuit 204 to control the power electronic device 202 to be conducted. By adopting the design, the control circuit can be triggered to control the on-off of the power electronic device through the matching between the rotating shaft and the driving button, the structure is simple, and the convenience of on-off control of the power electronic device is improved.
As a possible embodiment, referring to fig. 5 and 6, the main contact 10 includes a fixed contact 104 and a movable contact 103 connected to a driving mechanism 120; the driving mechanism 120 is used for driving the moving contact 103 to contact with the fixed contact 104, so that the main contact 10 completes a closing action; the driving mechanism 120 is used for driving the movable contact 103 to be separated from the fixed contact 104, so that the main contact 10 completes the opening or tripping action.
As a possible embodiment, referring to fig. 5 and 6, the driving mechanism 120 further includes a link mechanism 102; the link mechanism 102 is connected with the moving contact 103; the link mechanism 102 is used for driving the moving contact 103 to contact with the fixed contact 104 under the driving of the toggle switch 105, so that the main contact 10 performs a closing action; the link mechanism 102 is used for driving the movable contact 103 to be separated from the fixed contact 104 under the driving of the toggle switch 105, so that the main contact 10 performs a tripping operation. The link mechanism 102 may be a four-bar mechanism or a multi-bar mechanism, and may be in the form of a crank-rocker mechanism, a double-crank mechanism, a double-rocker mechanism, or the like, which may be determined by itself according to actual needs, and is not limited thereto.
For ease of installation, as a possible embodiment, as shown in fig. 3 to 6, the power electronics 202 is connected in parallel with the switching assembly 100 by a connecting conductor 203; the control circuit 204 is connected to the connection conductor 203. The number of the connecting conductors 203 may be multiple, and the specific number may be determined according to actual needs, which is not limited herein.
In order to improve the stability of the connection between the switch assembly 100 and the control module 200, as shown in fig. 3 and 4, a slot 106 corresponding to the upper end of the connection conductor 203 may be disposed on the bottom surface of the switch assembly 100; the control module 200 is fixedly mounted below the switch assembly 100 by a corresponding fit between the upper ends of the connecting conductors 203 and the card slot 106.
Specifically, taking fig. 3 and fig. 4 as an example, a connecting portion with a fastening hole may be further disposed at the upper end of the connecting conductor 203, and a fastening pillar corresponding to the fastening hole is disposed in the fastening groove, so that the stability of the corresponding fit between the upper end of the connecting conductor 203 and the fastening groove 106 is further improved by the fastening pillar passing through the fastening hole, and the firmness of the fit between the control module 200 and the switch assembly 100 is further ensured.
As a possible implementation, referring to fig. 2 to 6, the control module 200 further includes an insulating housing 201 for insulating and protecting components included in the control module 200.
As a possible implementation, referring to fig. 4 to 7, the control module 200 further includes a power supply unit 205 connected in series with the control circuit 204 for supplying power to the control circuit 204. Specifically, taking fig. 4 to 6 as an example, the power supply unit 205 has one end connected to the connection conductor 203 through a wire 206 and the other end connected to the control circuit 204 through the wire 206.
For further convenience of installation, taking fig. 4 as an example, the connection conductor 203 may be integrally formed as an "L" shaped structure, and a through hole for passing the conductive connecting member is formed on one side or both sides of the "L" shaped structure. Based on this, it is possible to connect one end of the power supply unit 205 to the connection conductor 203 through the wire 206 and the other end of the power supply unit 205 to the control circuit 204 through the wire 206, and to connect the end of the above-described power electronics 202 to the end of the connection conductor 203 in such a manner that a conductive connector passes through the through hole.
The shape of the connection conductor 203 may be determined by itself according to actual needs, and is not limited thereto.
In addition, the control module 200 may further set an on-time, and when the control circuit 204 controls the power electronic device 202 to enter the on-state, if the on-time reaches a predetermined value, the control circuit 204 is automatically triggered to control the power electronic device 202 to turn into the off-state. By this design, the convenience of on-off control of the power electronic device 202 is further improved.
The operation principle of the solid-state circuit breaker is described below with reference to fig. 5 and 6 as an example:
when the toggle switch 105 is in the "ON" position (i.e. the first position), the movable contact 103 contacts the fixed contact 104, the main contact 10 completes the closing action, the rotating shaft 101 is separated from the driving button 207, and the power electronic device 202 is controlled to be in the off state. When the toggle switch 105 is toggled from the "ON" position to the "OFF" position (i.e. the second position), the link mechanism 102 drives the moving contact 103 to gradually disengage from the stationary contact 104 under the driving of the toggle switch 105, so that the main contact 10 performs a tripping operation, and the rotating shaft 101 gradually rotates; until the toggle switch 105 is in the "OFF" position, the movable contact 103 is completely separated from the fixed contact 104, the main contact 10 completes the opening or tripping action, and the rotating shaft 101 presses the driving button 207 to trigger the control circuit 204 to control the power electronic device 202 to enter the conducting state. If the on-time reaches a predetermined value, the auto-trigger control circuit 204 controls the power electronics 202 to turn off. If the conduction time does not reach the preset value, when the toggle switch 105 toggles from the "OFF" position to the "ON" position, the link mechanism 102 drives the moving contact 103 to gradually approach the static contact 104 under the driving of the toggle switch 105, so that the main contact 10 performs a switching-ON action, and the rotating shaft 101 gradually rotates; until the toggle switch 105 is in the "ON" position, the movable contact 103 is in close contact with the fixed contact 104, the main contact 10 completes the closing action, and the rotating shaft 101 is completely separated from the driving button 207 to trigger the control circuit 204 to control the power electronic device 202 to turn into the off state.
Based on the solid-state circuit breaker, an embodiment of the present invention further provides a power device, which includes the solid-state circuit breaker.
The power device provided by the embodiment of the present invention includes all technical features of the solid-state circuit breaker, and the implementation principle and the generated technical effects thereof are the same as those of the solid-state circuit breaker, and are not repeated herein, and reference may be made to the related contents.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A solid state circuit breaker, comprising: the control module is connected in parallel with the switch assembly; the control module is fixedly arranged below the switch assembly; the switch assembly comprises a main contact and a driving mechanism for driving the main contact to perform switching-on, switching-off or tripping actions; the control module comprises a control circuit and a power electronic device connected with the switch component in parallel; the solid-state circuit breaker further comprises a triggering device connected with the control circuit; the trigger device is used for triggering the control circuit to control the on-off of the power electronic device when the main contact performs switching-on, switching-off or tripping actions; the drive mechanism is mechanically associated with the trigger device.
2. The solid state circuit breaker of claim 1, wherein the drive mechanism comprises a toggle switch rotatably disposed via a shaft; the trigger device comprises an actuating button; the rotating shaft is used for being separated from a driving button when the main contact performs a closing action so as to trigger the control circuit to control the power electronic device to be disconnected; the rotating shaft is used for pressing a driving button when the main contact performs opening or tripping action so as to trigger the control circuit to control the power electronic device to be conducted.
3. The solid-state circuit breaker according to claim 1, wherein the triggering device is configured to trigger the control circuit to control the power electronics to conduct when the main contact performs a closing action; the trigger device is used for triggering the control circuit to control the power electronic device to be disconnected when the main contact performs opening or tripping action.
4. The solid state circuit breaker of claim 2, wherein the toggle switch is divided into a first gear and a second gear; the first gear corresponds to the position of the main contact after completing the switching-on action; and the second gear corresponds to the position of the main contact after the opening or tripping action is finished.
5. The solid state circuit breaker of claim 2 or 4, wherein the main contacts comprise fixed contacts and movable contacts connected to the driving mechanism; the driving mechanism is used for driving the moving contact to be in contact with the fixed contact so as to enable the main contact to complete a switching-on action; the driving mechanism is used for driving the moving contact to be separated from the fixed contact, so that the main contact completes the action of opening or tripping.
6. The solid state circuit breaker of claim 5, wherein the drive mechanism further comprises a linkage mechanism; the connecting rod mechanism is connected with the moving contact; the connecting rod mechanism is used for driving the moving contact to be in contact with the fixed contact under the driving of the toggle switch so as to enable the main contact to perform a switching-on action; the link mechanism is used for driving the moving contact to be separated from the fixed contact under the driving of the toggle switch so as to enable the main contact to perform opening or tripping action.
7. The solid state circuit breaker of claim 1, wherein the control module further comprises a power supply unit in series with the control circuit for powering the control circuit.
8. The solid state circuit breaker of claim 1, wherein the power electronics are connected in parallel with the switch assembly by a connecting conductor; the control circuit is connected to the connection conductor.
9. The solid state circuit breaker of claim 8, wherein the connection conductor is plural in number; the bottom surface of the switch component is provided with a clamping groove corresponding to the upper end of the connecting conductor; the control module is fixedly arranged below the switch component through the corresponding matching between the upper end of the connecting conductor and the clamping groove.
10. A power device, characterized in that the power device comprises a solid state circuit breaker according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220676495.XU CN216928466U (en) | 2022-03-24 | 2022-03-24 | Solid-state circuit breaker and power equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220676495.XU CN216928466U (en) | 2022-03-24 | 2022-03-24 | Solid-state circuit breaker and power equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216928466U true CN216928466U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220676495.XU Active CN216928466U (en) | 2022-03-24 | 2022-03-24 | Solid-state circuit breaker and power equipment |
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| Country | Link |
|---|---|
| CN (1) | CN216928466U (en) |
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- 2022-03-24 CN CN202220676495.XU patent/CN216928466U/en active Active
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