CN115938876A - Circuit breaker control device and circuit breaker - Google Patents

Abstract

The application provides a circuit breaker controlling means and circuit breaker relates to low-voltage apparatus technical field, includes: the circuit breaker comprises a power supply, a switch and an SMA assembly, wherein the SMA assembly is used for being in driving connection with an operating mechanism of the circuit breaker, the SMA assembly, the switch and the power supply are connected in series to form a closed circuit, and when the switch is in a closed state, the SMA assembly is electrified and contracted to drive the operating mechanism to switch on or switch off. The on-off of closed circuit is controlled through the switch, the electric control that the circular telegram deformation characteristic that combines the SMA subassembly realized that the circuit breaker closed the separating brake has effectively replaced the electric operating mechanism that current circuit breaker passed through realization control such as motor, gear, effectively reduces the inside spare part of circuit breaker casing, reduces the occupation space of electric operating mechanism, simultaneously, can carry out electric control to the separating brake that closes of circuit breaker through control switch's state.

Description

Circuit breaker control device and circuit breaker

Technical Field

The application relates to the technical field of low-voltage apparatuses, in particular to a circuit breaker control device and a circuit breaker.

Background

With the rapid development of economy, the living standard of people is rapidly improved, and the safety of household electricity utilization is required to be higher. The circuit breaker may be mounted to the terminal distribution line. Meanwhile, the circuit can be connected, carried and disconnected under the condition of normal or abnormal circuit, and the circuit and the electrical equipment are effectively protected.

The existing circuit breaker usually needs to be electrically switched on and off by arranging an electric operating mechanism such as a motor, a gear and the like in a shell to be matched with a control circuit, so that the circuit breaker shell is more in internal parts and larger in occupied space, and the miniaturization of the circuit breaker is blocked.

Disclosure of Invention

An object of this application lies in, to the not enough among the above-mentioned prior art, provides a circuit breaker controlling means and circuit breaker to it is more to improve current circuit breaker electricity and to handle mechanism spare part, and occupation space is great, and controls comparatively complicated problem.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

in one aspect of the embodiments of the present application, a circuit breaker control device is provided, including: the circuit breaker comprises a power supply, a switch and an SMA assembly, wherein the SMA assembly is used for being in driving connection with an operating mechanism of the circuit breaker, the SMA assembly, the switch and the power supply are connected in series to form a closed circuit, and when the switch is in a closed state, the SMA assembly is electrified and contracted to drive the operating mechanism to switch on or switch off.

Optionally, the SMA assembly includes a closing SMA member and a closing conductive member, and the closing SMA member, the closing conductive member, the switch and the power supply are connected in series.

Optionally, the SMA assembly includes a switching-off SMA component and a switching-off conductive component, and the switching-off SMA component, the switching-off conductive component, the switch and the power supply are connected in series.

Optionally, the SMA assembly includes a switching-off SMA component and a switching-off conductive component, the switching-on SMA component and the switching-on conductive component are connected in series to form a first branch circuit, the switching-off SMA component and the switching-off conductive component are connected in series to form a second branch circuit, the switch and the power supply are connected in series, and the first branch circuit and the second branch circuit are connected in parallel.

Optionally, the switch includes a closing switch and an opening switch, the closing switch is connected in series with the first branch and in parallel with the second branch, and the opening switch is connected in parallel with the first branch and in series with the second branch; or the switch comprises a first contact and a second contact, the first contact is connected with the first branch, and the second contact is connected with the second branch.

Optionally, the closing conductive piece and the opening conductive piece are SMA or wire respectively.

Optionally, the switching-on SMA piece, the switching-on conductive piece, the switching-off SMA piece, and the switching-off conductive piece are all connected to the closed circuit through ports of the wire holder.

Optionally, the wire holder includes a first port, a second port, and a third port, the closing SMA element is connected to the first port, the opening SMA element is connected to the second port, and both the closing conductive element and the opening conductive element are connected to the third port.

Optionally, the power supply further comprises a control switch and a capacitor plate, the capacitor plate is connected in series with the power supply, the capacitor plate is respectively connected in parallel with the switch and the SMA assembly, and the open-close state of the control switch is opposite to the open-close state of the switch.

Optionally, the controller is further included, and the controller is electrically connected with the switch.

On the other hand of this application embodiment provides a circuit breaker, including the casing, set up operating device and the circuit breaker controlling means of any kind in the casing, circuit breaker controlling means's SMA subassembly and operating device drive connection.

The beneficial effect of this application includes:

the application provides a circuit breaker controlling means and circuit breaker includes: the circuit breaker comprises a power supply, a switch and an SMA assembly, wherein the SMA assembly is used for being in driving connection with an operating mechanism of the circuit breaker, the SMA assembly, the switch and the power supply are connected in series to form a closed circuit, and when the switch is in a closed state, the SMA assembly is electrified and contracted to drive the operating mechanism to switch on or switch off. The on-off of closed circuit is controlled through the switch, the electric control that the circular telegram deformation characteristic that combines the SMA subassembly realized that the circuit breaker closed the separating brake has effectively replaced the electric operating mechanism that current circuit breaker passed through realization control such as motor, gear, effectively reduces the inside spare part of circuit breaker casing, reduces the occupation space of electric operating mechanism, simultaneously, can carry out electric control to the separating brake that closes of circuit breaker through control switch's state.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a circuit breaker control device according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a closing control circuit of a circuit breaker control device according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of an opening control circuit of a circuit breaker control device according to an embodiment of the present disclosure;

fig. 4 is one of schematic circuit diagrams of a parallel connection of a closing control circuit and an opening control circuit of a circuit breaker control device according to an embodiment of the present disclosure;

fig. 5 is a second schematic circuit diagram illustrating a parallel connection of a closing control circuit and an opening control circuit of a circuit breaker control device according to an embodiment of the present disclosure;

fig. 6 is a third schematic circuit diagram illustrating a parallel connection of a closing control circuit and an opening control circuit of a circuit breaker control device according to an embodiment of the present disclosure;

fig. 7 is a second schematic diagram of a closing control circuit of a circuit breaker control apparatus according to an embodiment of the present disclosure;

fig. 8 is a second schematic diagram of a switching-off control circuit of a circuit breaker control device according to an embodiment of the present application;

fig. 9 is a fourth schematic circuit diagram illustrating a parallel connection of a closing control circuit and an opening control circuit of a circuit breaker control device according to an embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of an SMA assembly of a circuit breaker control apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a circuit breaker according to an embodiment of the present disclosure;

fig. 12 is a second schematic structural diagram of a circuit breaker according to an embodiment of the present application.

Icon: 100-a housing; 110-a button; 120-wire holder; 140-a handle; 150-a transmission assembly; 160-moving contact; 170-fixed contact; 180-an armature; 190-a release; 300-SMA component; 310-a closing component; 311-closing SMA part; 312-closing a conductive piece; 320-a brake separating component; 321-brake-off SMA part; 322-a break gate conductive member; 340-a connecting seat; 341-hitching hole; 342-a crimping section; 350-a wiring terminal; 410-a power supply; 420-a switch; a-a first contact; b-a second contact; 500-an operating mechanism; 600-a controller; s11, a closing switch; s12, opening a switch; s2, controlling a switch; c-capacitance plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. It should be noted that, in case of conflict, various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of the present application.

In the description of the present application, it is noted that the terms "first", "second", "third", and the like are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In one aspect of the embodiments of the present application, as shown in fig. 1, there is provided a circuit breaker control device, including: the power source 410, the switch 420 and the SMA assembly 300. The SMA assembly 300 may be connected to the operating mechanism 500 of the circuit breaker, with the SMA assembly 300, the switch 420 and the power source 410 being connected in series to form a closed circuit as shown in fig. 2 or 3. Thus, when the control switch S2 is in a closed state, the closed circuit is turned on, the power supply 410 can energize the SMA component 300, and the energized SMA component 300 deforms along with the temperature rise, so as to drive the operating mechanism 500 to move in the closing direction or the opening direction, thereby completing the closing or opening of the circuit breaker and achieving the electric control of the circuit breaker, i.e., the closed circuit in fig. 2 may be used as a closing control circuit or an opening control circuit. From this, control closed circuit ' S break-make through switch 420, combine SMA subassembly 300 ' S circular telegram deformation characteristic to realize the electric control that the circuit breaker closed and opened the floodgate, effectively replaced current circuit breaker and passed through the electric manipulation mechanism that motor, gear etc. realized control, effectively reduced the inside spare part of circuit breaker casing 100, reduced the occupation space of electric manipulation mechanism, simultaneously, can carry out electric control to the switching and opening of circuit breaker through control switch S2 ' S state.

Shape Memory Alloys (SMA) are materials composed of two or more metal elements having a Shape Memory Effect (SME) by thermo-elastic and martensitic phase transformations and inversions thereof. The microstructure of the shape memory alloy has two relatively stable states, the shape memory alloy being changed at high temperatures, e.g. the alloy can be stretched at lower temperatures, but if it is reheated it remembers its original shape and changes back. By utilizing the property of the shape memory alloy, the SMA wire made of the shape memory alloy can generate a contraction force when being electrified, and when the SMA wire is connected to the corresponding position of a handle, an operating mechanism or a release of the circuit breaker, the circuit breaker can be controlled to act through the contraction force of the SMA wire as long as the SMA wire has a certain length to ensure the contraction force and the stroke, so that the opening or closing function is realized.

In some embodiments, as shown in fig. 1, a controller 600 may be further provided, and the controller 600 is electrically connected to the switch 420, so that the on-off state of the switch 420 can be controlled by the controller 600, and the circuit breaker control device has a remote control capability.

Optionally, as shown in fig. 12, the operating mechanism 500 may include a button 110, a handle 140, a transmission assembly 150, a movable contact 160, and a fixed contact 170, where the button 110, the handle 140, and the movable contact 160 may be rotatably disposed on the housing 100, the button 110 is drivingly connected to the handle 140, the handle 140 is drivingly connected to the transmission assembly 150, and the transmission assembly 150 is drivingly connected to the movable contact 160, so that when the switch needs to be switched on, when the button 110 is driven or the handle 140 is driven, the transmission assembly 150 is driven to drive the movable contact 160 to rotate toward a switching-on direction, that is, the movable contact 160 moves toward a direction close to the fixed contact 170, until both are switched on in place, that is, the switch is switched on; similarly, when the switch is required to be opened, when the button 110 is driven or the handle 140 is driven, the transmission assembly 150 is driven to drive the movable contact 160 to rotate toward the opening direction, that is, the movable contact 160 moves toward the direction away from the fixed contact 170 until the switch is in place, and then the switch is opened. In addition, the electromagnetic trip device further comprises an armature 180 and a release 190, wherein the armature 180 is in driving connection with the transmission assembly 150, and a driving end of the release 190 corresponds to the position of the armature 180 so as to drive the armature 180 to move to drive the action mechanism to open when the release 190 acts.

Optionally, as shown in fig. 10, the SMA assembly 300 includes a closing assembly 310, where the closing assembly 310 includes a closing SMA component 311 and a closing conductive component 312, and one end of the closing SMA component 311 is connected to one end of the closing conductive component 312. The other end of the closing SMA element 311 is connected to the switch 420, and the other end of the closing conductive element 312 is connected to the power source 410, or the other end of the closing SMA element 311 is connected to the power source 410, and the other end of the closing conductive element 312 is connected to the switch 420, so that the closing SMA element 311, the closing conductive element 312, the switch 420 (hereinafter, referred to as a closing switch S11 for convenience of distinction), and the power source 410 are connected in series to form a closing control circuit as shown in fig. 2.

When the closing SMA 311 is connected to the operating mechanism 500, it may be connected to one of the knob 110 (shown in fig. 11 and 12) and the handle 140 of the operating mechanism 500. Thus, when the controller 600 controls the closing switch S11 to be closed, the closing control circuit is turned on, and the closing SMA member 311 deforms and contracts, so as to pull the button 110 or the handle 140, thereby driving the transmission assembly 150 to drive the moving contact 160 to move toward the closing direction until the closing is completed, and the controller 600 controls the closing switch S11 to be disconnected.

Optionally, as shown in fig. 10, the SMA assembly 300 includes a switching-off assembly 320, where the switching-off assembly 320 includes a switching-off SMA element 321 and a switching-off conductive element 322, and one end of the switching-off SMA element 321 is connected to one end of the switching-off conductive element 322. The other end of the opening SMA element 321 is connected to the switch 420, and the other end of the opening conductive element 322 is connected to the power supply 410, or the other end of the opening SMA element 321 is connected to the power supply 410, and the other end of the opening conductive element 322 is connected to the switch 420, so that the opening SMA element 321, the opening conductive element 322, the switch 420 (for the sake of distinction, will be referred to as the opening switch S12 hereinafter) and the power supply 410 are connected in series to form an opening control circuit as shown in fig. 3.

The opening SMA member 321 is connected to the operating mechanism 500, and may be connected to one of the button 110 (shown in fig. 11 and 12), the handle 140, the armature 180, and the release 190 of the operating mechanism 500. Therefore, when the controller 600 controls the opening switch S12 to be closed, the opening control circuit is turned on, and the opening SMA member 321 deforms and contracts, so as to pull the button 110 or the handle 140, thereby driving the transmission assembly 150 to drive the moving contact 160 to move toward the opening direction until the opening is in place, and the controller 600 controls the opening switch S12 to be turned off.

Optionally, as shown in fig. 10, fig. 11, and fig. 12, in order to facilitate connection of the SMA element with the control module, a connection seat 340 may be further disposed at an end portion where the closing conductive element 312 and the closing SMA element 311 are connected, and a connection seat 340 is also disposed at an end portion where the opening conductive element 322 and the opening SMA element 321 are connected, so that the closing conductive element 312, the closing SMA element 311, the opening conductive element 322, and the opening SMA element 321 are all connected to the actuating mechanism through the connection seat 340, thereby avoiding damage to a plastic element of the actuating mechanism due to the alloy element, and improving durability of long-term use. The other end of the closing conductive component 312 and the other end of the closing SMA component 311 may be further provided with a connection terminal 350, the other end of the opening conductive component 322 and the other end of the opening SMA component 321 are also provided with connection terminals 350, and all the connection terminals 350 are inserted into the connection terminal base 120 fixedly arranged on the casing 100 through interference fit, so that during wiring, an external circuit can be inserted into the connection terminal base 120 to complete connection between the SMA component 300 and a closed circuit. The ends of the closing conductive member 312, the closing SMA member 311, the opening conductive member 322, and the opening SMA member 321 connected to the wire holder 120 may be fixed ends. The connection seat 340 is provided with a hanging connection hole 341 and a crimping part 342, the end part of the connection between the closing conductive piece 312 and the closing SMA piece 311 is arranged at the crimping part 342 of one connection seat 340, and the end part of the connection between the closing conductive piece 312 and the closing SMA piece 311 is bent through a crimping process, so that the connection stability is improved, and the connection modes of the opening conductive piece 322, the opening SMA piece 321 and the connection seat 340 are the same. The connecting seat 340 can be connected to the actuating mechanism through the engaging hole 341.

In some embodiments, only the above-mentioned closing control circuit or opening control circuit may be provided in the circuit breaker, that is, only the closing SMA element 311 controls the circuit breaker to close or the opening SMA element 321 controls the circuit breaker to open; the circuit breaker may be provided with the above-mentioned switching-on control circuit and switching-off control circuit at the same time, so that the switching-on or switching-off of the circuit breaker may be controlled by the switching-on SMA element 311 and the switching-off SMA element 321, respectively.

In some embodiments, when both the closing control circuit and the opening control circuit are provided in the circuit breaker, as shown in fig. 2 and 3, the closing control circuit and the opening control circuit may be two independent circuits, that is, when the closing conductive member 312 and the closing SMA member 311 do not share the connection terminal 350 with the opening conductive member 322 and the opening SMA member 321. The controller 600 may be set as one, the controller 600 controls the closing switch S11 and the opening switch S12 respectively, when closing is required, the controller 600 controls the closing switch S11 to be closed, the opening switch S12 to be opened, at this time, the power supply 410 energizes the closing SMA part 311 to contract, and drives the operating mechanism 500 to close; when the brake is required to be opened, the controller 600 controls the closing switch S11 to be opened, the opening switch S12 to be closed, and at this time, the power supply 410 energizes the brake-separating SMA member 321 to contract, so as to drive the operating mechanism 500 to open.

In some embodiments, when the closing control circuit and the opening control circuit are both provided in the circuit breaker, the closing control circuit and the opening control circuit may be connected in parallel, that is, as shown in fig. 10, the closing conductive member 312 and the opening conductive member 322 share one connection terminal 350, so that the number of the connection terminals 350 is saved, and the volume of the connection holder 120 is reduced. As shown in fig. 4, when the switching-on conductive device 312 and the switching-off conductive device 322 share one connection terminal 350, the switching-on SMA device 311 and the switching-off conductive device 312 are connected in series to form a first branch, the switching-off SMA device 321 and the switching-off conductive device 322 are connected in series to form a second branch, and the first branch and the second branch are connected in parallel. In some embodiments, the closed circuit formed by the first branch and the second branch connected in parallel may also be a circuit as shown in fig. 5, that is, the closing control circuit and the opening control circuit share one power source 410, so that the number of the power sources 410 can be effectively saved.

In some embodiments, the switch 420 may include a closing switch S11 and an opening switch S12, when the first branch and the second branch are connected in parallel, as shown in fig. 4 or fig. 5, the closing switch S11 is located in the first branch, that is, the closing switch S11 is connected in parallel with the second branch, and the opening switch S12 is located in the second branch, that is, the opening switch S12 is connected in parallel with the first branch, so that when closing is required, the controller 600 controls the closing switch S11 to be closed, the opening switch S12 is opened, and at this time, the power supply 410 energizes the closing SMA 311 to contract, so as to drive the operating mechanism 500 to close; when the brake is required to be opened, the controller 600 controls the closing switch S11 to be opened, the opening switch S12 to be closed, and at this time, the power supply 410 energizes the brake-separating SMA member 321 to contract, so as to drive the operating mechanism 500 to open.

In some embodiments, the switch 420 may be configured as a dual-contact switch 420, when the first branch and the second branch are connected in parallel, as shown in fig. 6, the switch 420 includes a first contact a and a second contact b, the first contact a is connected to the first branch, and the second contact b is connected to the second branch, so that when a switch needs to be switched on, the controller 600 controls the dual-contact switch 420 to be closed with the first contact, and at this time, the power supply 410 energizes the switching SMA member 311 to contract, thereby driving the operating mechanism 500 to be switched on; when the opening is needed, the controller 600 controls the double-contact switch 420 to close with the second contact, and at this time, the power supply 410 energizes the opening SMA member 321 to contract, so as to drive the operating mechanism 500 to open.

Optionally, the circuit breaker control device further includes a control switch S2 and a capacitor plate C, the capacitor plate C is connected in series with the power supply 410, the capacitor plate C is connected in parallel with the switch 420 and the SMA assembly 300 respectively, the open-close state of the control switch S2 is opposite to the open-close state of the switch 420, thus, the charged capacitor plate C can be used as the new power supply 410, when the SMA assembly 300 needs to be powered on, the closing switch S11 is closed, and therefore the SMA assembly 300 is powered on and deforms. The capacitor plate C is added, so that the SMA component 300 can be electrified and deformed by using larger instantaneous current generated by the capacitor plate C during discharging, and meanwhile, the characteristic that the capacitor plate C is gradually attenuated in the discharging process can be used, the phenomenon that the performance of the SMA component 300 is reduced due to excessive heating is avoided, and the durability of the SMA component 300 in long-term use is effectively improved.

In some embodiments, as shown in fig. 7, when the closing assembly 310 includes a closing conductive member 312 and a closing SMA member 311, a capacitive plate C is connected in parallel with the closing assembly 310, the capacitive plate C is connected in parallel with a closing switch S11, and a control switch S2 is disposed between the capacitive plate C and the power source 410, so that in the opening state, the controller 600 controls the closing switch S11 to be opened and the control switch S2 to be closed, and at this time, the power source 410 can charge the capacitive plate C. When the capacitor plate C needs to be switched on, the controller 600 controls the control switch S2 to be switched off and controls the switching-on switch S11 to be switched on, at the moment, the capacitor plate C discharges, the switching-on SMA part 311 is electrified and contracted to drive the operating mechanism 500 to be switched on, and after the switching-on is in place, the controller 600 controls the control switch S2 to be switched on and controls the switching-on switch S11 to be switched off, so that the power supply 410 can charge the capacitor plate C again.

In some embodiments, as shown in fig. 8, when the opening assembly 320 includes the opening conductive member 322 and the opening SMA member 321, the capacitor plate C is connected in parallel with the opening assembly 320, the capacitor plate C is connected in parallel with the opening switch S12, and the control switch S2 is disposed between the capacitor plate C and the power source 410, so that in the closing state, the controller 600 controls the opening switch S12 to be opened and the control switch S2 to be closed, and at this time, the power source 410 can charge the capacitor plate C. When the brake is required to be opened, the controller 600 controls the control switch S2 to be opened and controls the brake opening switch S12 to be closed, at this time, the capacitor plate C is discharged, the brake opening SMA member 321 is electrified and contracted to drive the operating mechanism 500 to be opened, and after the brake opening is in place, the controller 600 controls the control switch S2 to be closed and controls the brake opening switch S12 to be opened, so that the power supply 410 can charge the capacitor plate C again.

In some embodiments, when both the closing control circuit and the opening control circuit are provided in the circuit breaker, as shown in fig. 7 and 8, the closing control circuit and the opening control circuit may be two independent circuits, that is, when the closing conductive member 312 and the closing SMA member 311 do not share the connection terminal 350 with the opening conductive member 322 and the opening SMA member 321.

In some embodiments, as shown in fig. 9, when the first branch and the second branch are connected in parallel, only one capacitor plate C may be added (although two capacitor plates C may be provided in other embodiments). In this way, in the open state, the controller 600 controls the closing switch S11 and the opening switch S12 to be opened, and controls the control switch S2 to be closed, and at this time, the power source 410 can charge the capacitor plate C. When the switch needs to be switched on, the controller 600 controls the control switch S2 and the opening switch S12 to be switched off, controls the switch-on switch S11 to be switched on, at this time, the capacitor plate C discharges, the switch-on SMA piece 311 is electrified and contracted, the driving operation mechanism 500 is driven to be switched on, and after the switch is switched on in place, the controller 600 controls the control switch S2 to be switched on, controls the switch-on switch S11 and the opening switch S12 to be switched off, so that the power supply 410 can charge the capacitor plate C again; when the brake is required to be opened, the controller 600 controls the control switch S2 and the closing switch S11 to be opened, controls the opening switch S12 to be closed, at this time, the capacitor plate C is discharged, the opening SMA member 321 is electrified and contracted to drive the operating mechanism 500 to open, and after the opening is in place, the controller 600 controls the control switch S2 to be closed, controls the opening switch S12 and the closing switch S11 to be opened, so that the power supply 410 can charge the capacitor plate C again.

Optionally, in the above embodiment, the closing conductive device may be a wire or SMA, and similarly, the opening conductive device may also be a wire or SMA.

Optionally, when the closing conductive device 312 and the opening conductive device 322 share one connection terminal 350, the connection terminal 120 includes a first port, a second port, and a third port, the closing SMA device 311 is connected to the first port, the opening SMA device 321 is connected to the second port, and the closing conductive device 312 and the opening conductive device 322 are connected to the third port through the shared connection terminal 350.

On the other hand of the embodiment of the present application, as shown in fig. 11 and fig. 12, the circuit breaker includes a housing 100, an operating mechanism 500 disposed in the housing 100, and a circuit breaker control device of any one of the above, an SMA component 300 of the circuit breaker control device is in driving connection with the operating mechanism 500, so that on/off of a closed circuit is controlled through a switch 420, electric control of opening/closing of the circuit breaker is realized by combining with an energization deformation characteristic of the SMA component 300, an electric operation mechanism of an existing circuit breaker that realizes control through a motor, a gear, and the like is effectively replaced, parts inside the circuit breaker housing 100 are effectively reduced, an occupied space of the electric operation mechanism is reduced, and meanwhile, electric control of opening/closing of the circuit breaker can be performed through the switch 420.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A circuit breaker control apparatus, comprising: the circuit breaker comprises a power supply, a switch and an SMA assembly, wherein the SMA assembly is used for being in driving connection with an operating mechanism of the circuit breaker, the SMA assembly, the switch and the power supply are connected in series to form a closed circuit, and when the switch is in a closed state, the SMA assembly is electrified and contracted to drive the operating mechanism to switch on or switch off.

2. The circuit breaker control apparatus of claim 1, wherein the SMA component comprises a closing SMA element and a closing conductive element, the closing SMA element, the closing conductive element, the switch, and the power source being connected in series.

3. The circuit breaker control apparatus of claim 1, wherein the SMA component comprises a opening SMA member and an opening conductive member, the opening SMA member, the opening conductive member, the switch and the power source being connected in series.

4. The circuit breaker control apparatus of claim 2, wherein the SMA component comprises a switching-off SMA element and a switching-off conductive element, the switching-off SMA element and the switching-off conductive element are connected in series to form a first branch, the switching-off SMA element and the switching-off conductive element are connected in series to form a second branch, the switch and the power source are connected in series, and the first branch and the second branch are connected in parallel.

5. The circuit breaker control apparatus of claim 4, wherein the switch comprises a closing switch in series with the first branch and in parallel with the second branch and an opening switch in parallel with the first branch and in series with the second branch; or, the switch comprises a first contact and a second contact, the first contact is connected with the first branch, and the second contact is connected with the second branch.

6. The circuit breaker control apparatus of claim 4, wherein the closing conductive member and the opening conductive member are SMA or wire, respectively.

7. The circuit breaker control apparatus of claim 4, further comprising a wire holder, wherein the closing SMA element, the closing conductive element, the opening SMA element, and the opening conductive element are all connected to the closed circuit through a port of the wire holder.

8. The circuit breaker control apparatus of claim 7, wherein the wire holder includes a first port, a second port, and a third port, the closing SMA member being connected to the first port, the opening SMA member being connected to the second port, and both the closing conductive member and the opening conductive member being connected to the third port.

9. The circuit breaker control apparatus of any one of claims 1 to 8, further comprising a control switch and a capacitive plate, wherein the capacitive plate is connected in series with the power source and is connected in parallel with the switch and the SMA assembly, respectively, and wherein an open-close state of the control switch is opposite to an open-close state of the switch; the controller is electrically connected with the switch.

10. A circuit breaker comprising a housing, an operating mechanism disposed within the housing, and a circuit breaker control apparatus as claimed in any one of claims 1 to 9, the SMA assembly of the circuit breaker control apparatus being in driving connection with the operating mechanism.

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