Trip switch and power conversion device

Abstract

The utility model provides a trip switch and a power conversion device. The tripping switch comprises an operating mechanism and a tripping mechanism, wherein the operating mechanism comprises a re-buckling piece, a locking piece and a tripping piece; wherein the operating mechanism comprises a locking state and a releasing state; the release comprises a magnetic element and a magnetic driving piece, and the magnetic driving piece is used for providing power for the passive assembly; the magnetic driving part is provided with a first tripping position, a second tripping position and an initial position between the first tripping position and the second tripping position relative to the magnetic element; the driven assembly comprises a first driven part and a second driven part; wherein the magnetic driving part moves from the initial position to the first tripping position or the second tripping position, and the first driven part drives the second driven part to move towards the second working position. The stability of the power conversion device can be improved to a certain extent.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, specifically to a trip switch and a power conversion device. Background Technology

[0002] Power conversion devices are widely used in power systems. Take inverters as an example. An inverter typically includes a trip switch, controller, power conversion unit, bus, and capacitors. The trip switch consists of a trip unit and a switching mechanism structurally connected together. When a fault occurs inside the inverter or in a connected external device, the controller sends a control signal to the trip unit, causing the switching mechanism to disconnect, thus protecting the inverter and the external device.

[0003] It is evident that the stability of the trip switch has a significant impact on the power system using this power conversion device. Summary of the Invention

[0004] This application provides a tripping switch and a power conversion device through multiple embodiments, which can improve the stability of the power conversion device to a certain extent.

[0005] In a first aspect, embodiments of this application provide a trip switch, the trip switch including an operating mechanism, a passive component, and a trip unit; the operating mechanism includes a latching state and a tripping state; the trip unit includes a magnetic element and a magnetic drive element, the magnetic drive element being used to provide power to the passive component; the magnetic drive element has a first tripping position, a second tripping position, and an initial position between the first tripping position and the second tripping position relative to the magnetic element; wherein, the magnetic drive element is held in the initial position under the magnetic force of the magnetic element, and the operating mechanism is held in the latching state; the magnetic drive element is held in the magnetic field of the magnetic element. The component is held in the first tripped position or the second tripped position under magnetic force, and the operating mechanism is held in the tripped state; the passive component includes a first driven member and a second driven member; wherein, the first driven member is coupled between the magnetic drive member and the second driven member; the second driven member includes a first working position and a second working position; the magnetic drive member is held in the initial position, and the second driven member is held in the first working position; the magnetic drive member moves from the initial position to the first tripped position or the second tripped position, and the first driven member drives the second driven member to move towards the second working position.

[0006] Optionally, the first driven member includes: a first driving end and a second driving end cooperating with the second driven member, a pivot shaft located between the first driving end and the second driving end, and a mating portion cooperating with the magnetic drive member; wherein, the mating portion is located between the first driving end and the pivot shaft, or, the mating portion is located between the second driving end and the pivot shaft; the magnetic drive member moves from the initial position to the first tripped position, causing the first driven member to rotate relative to the pivot shaft along a first rotation direction, and the second driving end pushes the second driven member to move from the first working position to the second working position; or, the magnetic drive member moves from the initial position to the second tripped position, causing the second driven member to rotate relative to the pivot shaft along a second rotation direction, and the first driving end pushes the second driven member to move from the first working position to the second working position; wherein, the second rotation direction is opposite to the first rotation direction.

[0007] Optionally, the second driven member is slidably connected to the base of the trip switch.

[0008] Optionally, a follower reset spring is provided between the second follower and the base of the trip switch; the follower reset spring applies a force to the second follower to keep the second follower in the first working position.

[0009] Optionally, the second follower has a pressure surface facing the operating mechanism; the first drive end of the first follower is provided with a first lever, and the second drive end is provided with a second lever; the second follower has a first groove for receiving the first lever and a second groove for receiving the second lever; wherein, the first groove has a first groove wall near the pressure surface, and the second groove has a second groove wall near the pressure surface; the first follower rotates along the first rotation direction, and the first lever applies pressure to the first groove wall, pushing the second follower to move from the first working position to the second working position; or, the first follower rotates along the second rotation direction, and the second lever applies pressure to the second groove wall, pushing the second follower to move from the first working position to the second working position.

[0010] Optionally, the second follower includes a first side arm and a second side arm, and a connecting arm that is fixedly connected to the first side arm and the second side arm; the first slide groove is disposed on the first side arm, the second slide groove is disposed on the second side arm, and the first slide groove, the second slide groove, the first side arm and the second side arm extend in the same direction.

[0011] Optionally, the trip unit is provided with a coil, and when current is applied to the coil, the resulting electromagnetic field drives the magnetic drive member to move from the initial position to the first trip position, or drives the magnetic drive member to move from the initial position to the second trip position.

[0012] Optionally, the magnetic drive component includes a central shaft and a moving magnetic component fixed on the central shaft; the trip unit is provided with a moving channel for the moving magnetic component to move; wherein, the position held by the magnetic drive component under the action of the magnetic element includes: the moving magnetic component is located in the initial position in the middle of the moving channel, and the moving magnetic component is located in a first tripping position and a second tripping position at one end of the moving channel.

[0013] Optionally, the two ends of the moving channel extending along the axis of the central axis are respectively provided with support members sleeved on the central axis, and the central axis can move relative to the support members along the axis of the central axis; a buffer spring is respectively provided between each support member and the moving magnet, and the buffer spring can apply a force toward the moving magnet toward the initial position.

[0014] Optionally, the trip unit includes a magnetic yoke with a receiving space, the magnetic element and the moving magnet being received within the magnetic yoke, and the movement channel being formed within the receiving space of the magnetic yoke.

[0015] Optionally, one end of the central shaft is bent relative to the axial direction of the central shaft to form a driving part; the trip switch further includes a reset button, the reset button having a free end and a mounting end that mates with the driving part; the magnetic drive is located at the first trip position, and the free end extends out of the base of the trip switch; or, the magnetic drive is located at the second trip position, and the free end is housed within the base of the trip switch.

[0016] Optionally, when the magnetic drive is in the first tripping position, the free end can push the magnetic drive from the first tripping position to the initial position under the action of an external force.

[0017] Optionally, the operating mechanism includes a trip unit reset component; the trip switch is provided with an operating handle, which is connected to the trip unit reset component via a transmission shaft; when the magnetic drive component is in the second trip position, the operating handle can operably drive the transmission shaft to rotate, and drive the trip unit reset component to push the central shaft, so that the magnetic drive component moves from the second trip position to the initial position.

[0018] Optionally, the operating mechanism includes: a re-fastener, a locking fastener, and a jumping fastener; wherein, the re-fastener abuts against the locking fastener, causing the jumping fastener to be locked by the locking fastener, thus placing the operating mechanism in the locked state; the operating mechanism being in the disengaged state is when: the re-fastener releases the locking fastener, the jumping fastener is released, thus placing the operating mechanism in the disengaged state.

[0019] Secondly, embodiments of this application provide a power conversion device, the power conversion device comprising: a power conversion circuit; an input circuit and an output circuit connected to the power conversion circuit; wherein the input circuit and / or the output circuit are provided with the aforementioned trip switch.

[0020] The various embodiments provided in this application, by incorporating magnetic elements and magnetic drive components, utilize the magnetic field of the magnetic elements to hold the magnetic drive component in a first tripping position, a second tripping position, or an initial position. Furthermore, by utilizing a passive component that cooperates with the magnetic drive component and the operating mechanism, the operating mechanism can change from a locked state to a tripped state and maintain both locked and tripped states, resulting in good overall stability of the trip switch. Moreover, when the trip unit moves from the initial position to the first or second tripping position, the first driven component of the passive component drives the second driven component to move towards the second working position, thereby triggering the operating mechanism to change to the tripped state, achieving good functional reliability of the trip switch. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a trip switch provided in one embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the structure of an operating mechanism provided in one embodiment of the present application; wherein the operating mechanism is in a locked state and the trip switch having the operating mechanism is in a closed state.

[0023] Figure 3 This is a schematic diagram of the structure of an operating mechanism provided in one embodiment of the present application; wherein the operating mechanism is in a locked state and the trip switch having the operating mechanism is in an open state.

[0024] Figure 4 This is a schematic diagram of the structure of an operating mechanism provided in one embodiment of this application; wherein the operating mechanism is in a disengaged state.

[0025] Figure 5 A schematic diagram of the internal structure of the base of a trip switch provided in one embodiment of this application; wherein the magnetic drive component of the trip unit is in the initial position.

[0026] Figure 6A schematic diagram of the internal structure of the base of a trip switch provided in one embodiment of this application; wherein the magnetic drive component of the trip unit is in the first trip position.

[0027] Figure 7 A schematic diagram of the internal structure of the base of a trip switch provided in one embodiment of this application; wherein the magnetic drive of the trip unit is in the second trip position.

[0028] Figure 8 A perspective view of a first follower provided for one embodiment of this application.

[0029] Figure 9 A perspective view of a second follower provided for one embodiment of this application.

[0030] Figure 10 for Figure 9 Another perspective view of the second follower, in which, with Figure 9 The second follower has a different perspective.

[0031] Figure 11 This is a schematic diagram of the internal structure of a trip unit provided in one embodiment of this application.

[0032] Figure 12 A perspective view of a reset button provided in one embodiment of this application.

[0033] Figure 13 A functional block diagram of a power conversion device provided in one embodiment of this application.

[0034] Explanation of reference numerals in the attached figures

[0035] 100. Trip switch; 103. Operating layer; 105. Unit layer; 107. Cover plate; 108. Operating handle; 109. Base; 110. Operating mechanism; 111. Re-fastener; 112. Locking position of locking fastener and re-fastener; 113. Locking fastener; 114. Locking position of trip fastener and locking fastener; 115. Tripping fastener; 117. Main tension spring; 119. Upper connecting rod; 121. Tripping spring; 123. Lower 125. Linkage; 127. Transmission component; 129. Lever; 131. Frame; 133. Re-lock spring; 134. Passive component; 135. First driven component; 137. Second driven component; 138. Pivot shaft; 139. Reset button; 141. Guide structure; 143. Slide rail; 144. Driven component reset spring; 145. Trip unit reset component; 150. Initial position; 151. First side arm; 152. Application 153. Pressure part; 155. Second side arm; 157. Connecting arm; 159. Tripping device; 161. Coil; 163. Support member; 165. Magnetic element; 166. Magnetic drive member; 167. Central shaft; 169. Moving magnetic element; 170. Moving channel; 171. Drive unit; 173. Magnetic yoke; 175. Buffer spring; 177. First tripping position; 179. Second tripping position; 181. First drive end; 1 83. Second drive end; 185. Connecting part; 187. Pressure surface; 189. First lever; 191. Second lever; 193. First slide groove; 195. Second slide groove; 197. First groove wall; 199. Second groove wall; 201. Free end; 203. Mounting end; 205. Through hole; 300. Power conversion device; 301. Power conversion circuit; 303. Input circuit; 305. Output circuit. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0037] In this application, the accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features.

[0038] Unless otherwise stated, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0039] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0041] In the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Please see Figure 1 , Figure 2 and Figure 5 In some embodiments, the trip switch 100 may include an operating layer 103 and a unit layer 105. The operating layer 103 may include a base 109, a cover plate 107 fixedly connected to the base 109, and an operating handle 108 disposed on the cover plate 107. An operating mechanism 110, a passive component 133, and a trip unit 157 are disposed within the internal space enclosed by the base 109 and the cover plate 107. The base 109 may have good stress strength to provide support for the operating mechanism 110, the passive component 133, and the trip unit 157. The unit layer 105 may include a moving contact, a stationary contact, and an arc-extinguishing system, etc.

[0043] One embodiment of this application provides a trip switch 100. The trip switch 100 includes an operating mechanism 110, a passive component 133, and a trip unit 157.

[0044] The operating mechanism 110 includes a locked state and a released state. When the operating mechanism 110 is in the locked state, the power conversion device using the trip switch 100 can operate normally. The released state can be the state of the operating mechanism 110 when the trip switch 100 can disconnect the moving contact and the stationary contact. In some embodiments, the operating mechanism 110 includes a re-fastening member 111, a locking member 113, and a tripping member 115; wherein the operating mechanism 110 has a locked state in which the re-fastening member 111 abuts against the locking member 113, causing the tripping member 115 to be locked by the locking member 113, and a released state in which the re-fastening member 111 releases the locking member 113, causing the tripping member 115 to be released. Specifically, as shown in the figure... Figure 2 The jump fastener and locking fastener locking position 114 and the locking fastener and re-fastener locking position 112 are shown.

[0045] The passive component 133 can apply pressure to the re-fastener 111 under the power provided by the trip unit 157, driving the operating mechanism 110 to change from the locked state to the released state.

[0046] The trip unit 157 includes a magnetic element 163 and a magnetic drive member 165, which provides power to the passive component 133. The magnetic drive member 165 can be held in multiple positions under the magnetic force provided by the magnetic element 163. Specifically, the magnetic drive member 165 has a first trip position 177, a second trip position 179, and an initial position 150 between the first and second trip positions 177 and 179, relative to the magnetic element 163. The magnetic drive member 165 is held in the initial position 150 under the magnetic force of the magnetic element 163, and the operating mechanism 110 remains in the locked state. Alternatively, the magnetic drive member 165 may be held in either the first trip position 177 or the second trip position 179 under the magnetic force of the magnetic element 163, and the operating mechanism 110 may remain in the tripped state.

[0047] In this embodiment, by providing a magnetic element 163 in the trip unit 157, the magnetic drive unit 165 can be held in the required position, thereby reducing the failure caused by abnormal disconnection of the trip unit 157.

[0048] Please see Figure 2 , Figure 3 and Figure 4 In some embodiments, the operating mechanism 110 includes a frame 129, a lever 127, an upper connecting rod 119, a lower connecting rod 123, a jump fastener 115, a locking fastener 113, a re-fastener 111, a main tension spring 117, a jump fastener spring 121, and a re-fastener locking spring 131.

[0049] The frame 129 includes a first side plate and a second side plate spaced apart. The first side plate and the second side plate are fixedly connected by connecting columns, so that the frame 129 forms a whole.

[0050] The lever 127 has an overall U-shaped structure and includes a first side arm, a second side arm, and a connecting arm. The first side arm and the second side arm are arranged parallel to each other on the outer sides of the first and second side plates of the frame 129, and the lever 127 is rotatably connected to the frame 129.

[0051] A jump fastener 115 is disposed between the first side plate and the second side plate and is rotatably connected to the frame 129. One end of the jump fastener 115 is provided with a first latch. The first latch can be locked with the locking fastener 113. The other end of the jump fastener 115 is provided with a jump fastener spring 121 hook-on part. Furthermore, the jump fastener 115 is also hinged to one end of the upper connecting rod 119.

[0052] The locking element 113 is disposed between the first side plate and the second side plate, and is rotatably connected to the frame 129. One end of the locking element 113 is located near one end of the tripping element 115. During the process of the moving contact and stationary contact of the trip switch 100 changing from the open state to the closed state, the locking element 113 and the tripping element 115 can form an overlap (lock). When the trip switch 100 is stably in the closed state, the locking element 113 and the tripping element 115 are also stably in the overlap (lock) state.

[0053] The re-fastener 111 is disposed between the first side plate and the second side plate, and is rotatably connected to the frame 129. The re-fastener 111 is located on one side of the locking fastener 113. The re-locking spring 131 acts between the locking fastener 113 and the re-fastener 111. Under its action, when the trip switch 100 is in the closed state, the trip fastener 115 engages (locks) with the locking fastener 113, and simultaneously, the re-fastener 111 abuts or locks against the locking fastener 113, so that the trip fastener 115, the locking fastener 113, and the re-fastener 111 form a stable locking state. In some cases, pressure is applied to the re-fastener 111, causing relative rotation between the re-fastener 111 and the locking fastener 113, thereby releasing the locking fastener 113 and subsequently releasing the trip fastener 115. Specifically, the jump fastener 115 will disengage from the locking fastener 113 under the action of the jump fastener spring 121, causing the operating mechanism 110 to be in the disengaged state.

[0054] One end of the upper connecting rod 119 is hinged to the trip fastener 115, and the other end of the upper connecting rod 119 is hinged to one end of the lower connecting rod 123. The other end of the lower connecting rod 123 is hinged to the transmission component 125, which can rotate around the main shaft. The transmission component 125 is linked with the moving contact, thereby driving the moving contact set in the unit layer 105 to rotate, completing operations such as closing, opening, and tripping.

[0055] One end of the main tension spring 117 is attached to the lever 127, and the other end is attached to the hinge shaft between the upper connecting rod 119 and the lower connecting rod 123. When the trip switch 100 is in the closed state, the main tension spring 117 is in a stored-energy state, and because the re-fastening member 111 and the locking member 113 abut or lock, the tripping member 115, the locking member 113, and the re-fastening member 111 form a stable locking state, and the entire operating mechanism 110 is also in a stable state. At this time, the upper connecting rod 119 and the lower connecting rod 123 are in a straightened state. When lever 127 is operated to open the circuit, the force direction of the upper connecting rod 119 and the lower connecting rod 123 changes abruptly. Under the action of the main tension spring 117, the hinge shaft of the upper connecting rod 119 and the lower connecting rod 123 is pulled, causing the upper connecting rod 119 and the lower connecting rod 123 to change from a straight state to a bent state. The lower connecting rod 123 drives the transmission component 125 to rotate, thereby opening the circuit.

[0056] Please see Figure 5 , Figure 6 and Figure 7 In some embodiments, the passive component 133 can apply pressure to the re-fastener 111 under the power provided by the trip unit 157, driving the operating mechanism 110 to change from the locked state to the released state.

[0057] The passive component 133 includes a first follower 135 and a second follower 137. The first follower 135 is coupled between the magnetic drive 165 and the second follower 137. The second follower 137 includes a first working position and a second working position. When the magnetic drive 135 is held in the initial position 150, the second follower 137 is held in the first working position. When the magnetic drive 165 moves from the initial position 150 to either the first tripping position 177 or the second tripping position 179, the first follower 135 drives the second follower 137 to move towards the second working position.

[0058] In this embodiment, the first driven member 135 receives power from the magnetic drive member 165 and further drives the second driven member 137. (See also...) Figure 5 and Figure 8The first follower 135 extends longitudinally and has a first drive end 181 and a second drive end 183 that are spaced apart from each other. The first drive end 181 and the second drive end 183 are respectively used to drive the second follower 137 to move from a first working position to a second working position. The first follower 135 is connected to the base 109 via a pivot 138, so that the first follower 135 can rotate relative to the base 109 about the pivot 138. In some embodiments, the pivot 138 is located at the middle position of the first follower 135 along its longitudinal extension direction, such that the rotation radii of the first drive end 181 and the second drive end 183 are the same. The magnetic drive component 165 moves from the initial position 150 to the first tripping position 177, or moves from the initial position 150 to the second tripping position 179, with the same moving distance. The arc length of the first drive end 181 is the same as the arc length of the second drive end 183, which can improve the stability of the overall structure.

[0059] The first driven member 135 is provided with a mating portion 185 that engages with the magnetic drive member 165. In some embodiments, the mating portion 185 is located between the first drive end 181 and the pivot shaft 138, or the mating portion 185 may also be located between the second drive end 183 and the pivot shaft 138. The mating portion 185 is driven by the magnetic drive member 165 to cause the first driven member 135 to rotate relative to the pivot shaft 138. Specifically, the mating portion 185 may be a strip-shaped hole that extends along the longitudinal direction of the first driven member 135.

[0060] In this embodiment, please refer to Figure 6 The magnetic drive 165 moves from the initial position 150 to the first tripped position 177, causing the first driven member 135 to rotate relative to the pivot shaft 138 along a first rotation direction, and the second drive end 183 pushes the second driven member 137 to move from the first working position to the second working position; or, please refer to Figure 7 The magnetic drive 165 moves from the initial position 150 to the second release position 179, causing the second driven member 137 to rotate relative to the pivot shaft 138 along the second rotation direction, and the first drive end 181 pushes the second driven member 137 to move from the first working position to the second working position; wherein, the second rotation direction is opposite to the first rotation direction.

[0061] As can be seen, corresponding to different movement directions of the magnetic drive component 165, the second driven component 137 moves from the first working position to the second working position. The trip switch 100 provided in this embodiment provides good control flexibility and structural reliability, and can be used in combination according to specific application scenarios.

[0062] Please see Figure 5 In some embodiments, the second follower 137 is slidably connected to the base 109 of the trip switch 100.

[0063] To further define the movement trajectory of the second follower 137, a slide rail 143 can be provided on the base 109. The second follower 137 can have a guide structure 141 that cooperates with the slide rail 143, so that the second follower 137 can move and change position along the slide rail 143. Specifically, the second follower 137 can move from the first working position to the second working position along the slide rail 143, so that the passive component 133 has better mechanical stability.

[0064] In some embodiments, a follower return spring 144 is provided between the second follower 137 and the base 109 of the trip switch 100; the follower return spring 144 applies a force to the second follower 137 to keep the second follower 137 in the first working position.

[0065] In this embodiment, after the second driven member 137 is in the second working position, the trip unit 157 may be operated to return to the initial position 150. At this time, the second driven member 137 can move towards the first working position under the elastic force of the driven member return spring 144 and remain in the first working position.

[0066] Please refer to the following: Figure 5 , Figure 8 , Figure 9 and Figure 10 . In some embodiments, the second follower 137 has a pressure surface 187 facing the operating mechanism 110; the first drive end 181 of the first follower 135 is provided with a first lever 189, and the second drive end 183 is provided with a second lever 191; the second follower 137 has a first groove 193 for receiving the first lever 189, and a second groove 195 for receiving the second lever 191; wherein, the first groove 193 has a first groove wall 197 near the pressure surface 187, and the second groove 195 has a second groove wall 199 near the pressure surface 187; the first follower 135 rotates along the first rotation direction, and the first lever 189 applies pressure to the first groove wall 197, pushing the second follower 137 from the first working position to the second working position; or, the first follower 135 rotates along the second rotation direction, and the second lever 191 applies pressure to the second groove wall 199, pushing the second follower 137 from the first working position to the second working position.

[0067] In this embodiment, the first drive end 181 of the first driven member 135 may be provided with a first lever 189, and the second drive end 183 may be provided with a second lever 191. The first lever 189 can engage with the first slide groove 193, and the second lever 191 can engage with the second slide groove 195, allowing the second driven member 137 to be driven by the first driven member 135 to move from the first working position to the second working position. Specifically, when the first driven member 135 rotates along the first rotation direction, the first lever 189 will contact the first groove wall 197 of the first slide groove 193 near the pressure surface 187, and by applying pressure to the first groove wall 197, the second driven member 137 will be pushed towards the second working position. When the first driven member 135 rotates along the second rotation direction, the second lever 191 contacts the second groove wall 199 of the second slide 195 near the pressure surface 187, and by applying pressure to the second groove wall 199, pushes the second driven member 137 to move towards the second working position. In a specific embodiment, the second driven member 137 is connected to the base 109 via a slide rail 143. When the first lever 189 applies pressure to the first groove wall 197, the second driven member 137 moves along the slide rail 143 to the second working position. Alternatively, when the second lever 191 applies pressure to the second groove wall 199, the second driven member 137 moves along the slide rail 143 to the second working position.

[0068] In some embodiments, the second follower 137 includes a first side arm 151 and a second side arm 153, and a connecting arm 155 that is fixedly connected to the first side arm 151 and the second side arm 153; the first slide groove 193 is disposed on the first side arm 151, the second slide groove 195 is disposed on the second side arm 153, and the first slide groove 193, the second slide groove 195, the first side arm 151 and the second side arm 153 extend in the same direction.

[0069] In this embodiment, the second follower 137 includes a first side arm 151, a second side arm 153, and a connecting arm 155, making the second follower 137 an integral unit. The connecting arm 155 may be provided with a pressure surface 187, so that when the first slide groove 193 or the second slide groove 195 is pushed by the first follower 135, the pressure surface 187 on the connecting arm 155 can apply pressure to the re-fastener 111. In some embodiments, the connecting arm 155 may be provided with a pressure portion 187, and the pressure surface 187 is the surface of the pressure portion 187 facing the re-fastener 111. The pressure portion 187 may protrude from the surface of the connecting arm 155, so that the pressure surface 187 can be closer to the re-fastener 111. In some embodiments, the pressure portion 187 may be provided with a guide structure 141, which is used to engage with the slide rail 143, allowing the second follower 137 to move along the slide rail 143.

[0070] In this embodiment, the first side arm 151 and the second side arm 153 extend in the same direction, and the connecting arm 155 is fixedly connected between them. Specifically, the first side arm 151, the second side arm 153, and the connecting arm 155 can be integrally formed. Of course, in some embodiments, the first side arm 151, the second side arm 153, and the connecting arm 155 can also be connected by fasteners, such as screws or riveting. A first groove 193 is provided on the first side arm 151, and the first groove 193 extends in the same direction as the first side arm 151. A second groove 195 is provided on the second side arm 153, and the second groove 195 extends in the same direction as the second side arm 153.

[0071] The second follower 137 provided in this embodiment has a relatively simple structure and is relatively easy to process and manufacture. Furthermore, the second follower 137 is provided with a first slide groove 193 on the first side arm 151 and a second slide groove 195 on the second side arm 153, which can cooperate well with the first follower 135 to change its working position under the drive of the first follower 135.

[0072] Please see Figure 5 and Figure 11 In some embodiments, the trip unit 157 is integrally fixedly connected to the base 109 to define the position of the trip unit 157. The magnetic element 163 may be made of a permanent magnet material. For example, the magnetic element 163 may be a magnet. The magnetic element 163 can cause the magnetic drive member 165 to be affected by magnetic force through the generated magnetic field.

[0073] The magnetic drive component 165 can be made of a ferromagnetic material, allowing it to be held in a designated position under the magnetic force of the magnetic element 163. It is understood that for the magnetic drive component 165 to be held in one position, an additional force is required, greater than the magnetic force generated by the magnetic element 163 that holds it in the current position, causing a change in its position. After the additional force is removed, the magnetic drive component 165 can be held in the changed position again under the magnetic force of the magnetic element 163. Specifically, when the operating mechanism 110 is in the locked state, the magnetic drive component 165 is held in its position under the magnetic force of the magnetic element 163, thus maintaining the passive component 133 in its current state, ensuring that the operating mechanism 110 is stably held in the locked state. Similarly, when the operating mechanism 110 is in the disengaged state, the magnetic drive 165 is also held in its position by the magnetic force of the magnetic element 163, and the operating mechanism 110 is stably held in the disengaged state. Furthermore, after the trip unit 157 is reset, that is, when the magnetic drive 165 is driven to the position corresponding to the locking state of the operating mechanism 110, the operating mechanism 110 can be changed to the locking state.

[0074] In this embodiment, the magnetic element 163 can hold the magnetic drive mechanism in multiple positions. Since different positions correspond to the locking or releasing states of the operating mechanism 110, the operating mechanism 110 can also be held in the corresponding state. This improves the overall stability of the trip switch 100.

[0075] In some embodiments, the trip unit 157 is provided with a coil 159, and when current is applied to the coil 159, the resulting electromagnetic field drives the magnetic drive member 165 to move from the initial position 150 to the first trip position 177, or drives the magnetic drive member 165 to move from the initial position 150 to the second trip position 179.

[0076] A coil 159 is provided inside the trip unit 157. When the coil 159 is energized, an electromagnetic field is generated, which drives the magnetic actuator 165 to change position. Specifically, the current intensity in the coil 159 affects the strength of the generated electromagnetic field. The greater the current intensity flowing through the coil 159, the stronger the generated electromagnetic field and the greater the magnetic force on the magnetic actuator 165. The smaller the current intensity flowing through the coil 159, the weaker the generated electromagnetic field. Thus, by specifying the current intensity flowing through the coil 159, an electromagnetic field of appropriate strength can be generated, so that the magnetic force generated by the electromagnetic field can overcome the magnetic force exerted by the magnetic element 163 on the magnetic actuator 165 to maintain its current position, allowing the magnetic actuator 165 to change its current position under the action of the magnetic force generated by the electromagnetic field. Specifically, when the magnetic drive 165 is driven to move by the electromagnetic field, the magnetic drive 165 can provide power to the passive component 133 so that, under the power provided by the trip unit 157, pressure is applied to the re-fastening member 111 of the operating mechanism 110.

[0077] In this embodiment, the direction of the current in the coil 159 can be controlled according to actual needs, so as to control the direction of the electromagnetic field generated by the coil 159, and then the magnetic drive 165 can be moved from the initial position 150 to the first tripping position 177 by the electromagnetic field, or the magnetic drive 165 can be moved from the initial position to the second tripping position 179 by the electromagnetic field.

[0078] In some embodiments, the magnetic element 163 is located in the middle region of the coil 159. This ensures that the magnetic field of the magnetic element 163 is evenly distributed within the trip unit 157, allowing the magnetic element 163 to be held in one position more stably.

[0079] In some embodiments, the magnetic drive 165 includes a central shaft 167 and a moving magnetic element 169 fixed on the central shaft 167; the trip unit 157 is provided with a moving channel 170 for the moving magnetic element 169 to move; wherein, the positions held by the magnetic drive 165 under the action of the magnetic element 163 include: the moving magnetic element 169 being in an initial position 150 in the middle of the moving channel 170, and the moving magnetic element 169 being in a first tripping position 177 and a second tripping position 179 at one end of the moving channel 170.

[0080] The central shaft 167 extends longitudinally and has an axial extension direction. When the magnetic drive member 165 is driven to move, it can move along the axial extension direction, changing the position of the magnetic drive member 165. The moving magnetic member 169 is made of ferromagnetic material, so that the moving magnetic member 169 can be subjected to magnetic force. The moving magnetic member 169 can be sleeved on the central shaft 167 and fixedly connected to the central shaft 167. Of course, the moving magnetic member 169 can also be directly integrally formed with the central shaft 167. In some embodiments, the central shaft 167 can also be made of ferromagnetic material, or the central shaft 167 can be made of magnetically permeable material.

[0081] A movement channel 170 is formed within the trip unit 157, providing movement space for the moving magnetic element 169 to change position within the trip unit 157. Specifically, the extending direction of the movement channel 170 is the same as the extending direction of the axis of the central shaft 167. That is, the central shaft 167 can pass through the movement channel 170 along its extending direction, so that when the central shaft 167 moves along its axis, the moving magnetic element 169 changes position along the movement channel 170.

[0082] In this embodiment, the magnetic drive 165 may include an initial position 150, a first tripping position 177, and a second tripping position 179. Specifically, the initial position 150 of the magnetic drive 165 is defined as the moving magnetic element 169 being in the middle of the moving channel 170. At this time, the magnetic drive 165 can move a distance of half the length of the moving channel 170. In some embodiments, the magnetic element 163 is positioned close to the middle region of the moving channel 170, and under the influence of the magnetic field of the magnetic element 163, the entire magnetic drive 165 can be relatively stably positioned in the initial position 150.

[0083] In some embodiments, the two ends of the moving channel 170 extending along the axial direction of the central axis 1678 are respectively provided with support members 161 sleeved on the central axis 167, and the central axis 167 can move relative to the support members 161 along the axial direction of the central axis 167; a buffer spring 175 is respectively provided between each support member 161 and the moving magnet 169, and the buffer spring 175 can apply a force toward the moving magnet 169 toward the initial position 150.

[0084] The support member 161 can be used to define the position of the central axis 167, so that the central axis 167 can move relatively stably and smoothly along the axial extension direction during movement. Furthermore, the support member 161 also forms the end wall of the moving channel 170, that is, the distance between the two support members 161 defines the length of the moving channel 170.

[0085] When the magnetic drive member 165 moves to the first tripped position 177, the moving magnet 169 approaches a support member 161 and compresses the buffer spring 175 between the moving magnet 169 and the support member 161. Similarly, when the magnetic drive member 165 moves to the second tripped position 179, the moving magnet 169 compresses the buffer spring 175 between itself and another support member 161. The buffer spring 175 applies a spring force to the magnetic drive member 165, pushing it towards the initial position 150. However, in this embodiment, the spring force provided by the buffer spring 175 is less than the magnetic force applied by the magnetic element 163 to the magnetic drive member 165 to maintain it in the first tripped position 177 or the second tripped position 179. Thus, the magnetic drive member 165 remains in the first tripped position 177 or the second tripped position 179 even without any additional force acting on it. Furthermore, during the process of the magnetic drive component 165 moving from the initial position 150 to the first release position 177 or the second release position 179, it will be subjected to the elastic force of the buffer spring 175. This can provide a buffer for the process of the magnetic drive component 165 moving to the first release position 177 or the second release position 179, and reduce the impact between the magnetic drive component 165 and the support component 161 when the magnetic drive component 165 moves to the first release position 177 or the second release position 179.

[0086] In some embodiments, the trip unit 157 includes a magnetic yoke 173 having a receiving space, the magnetic element 163 and the moving magnet 169 being received within the magnetic yoke 173, and the moving channel 170 being formed within the receiving space of the magnetic yoke 173.

[0087] The yoke 173 forms a closed magnetic flux path, which makes the magnetic field of the magnetic element 163 more concentrated, helping to hold the magnetic drive 165 in a more stable position. For example, it can hold the magnetic drive 165 in the initial position 150, the first tripped position 177, or the second tripped position 179.

[0088] In some embodiments, the moving magnet 169, the central shaft 167, and the support 161 are all made of magnetically permeable material. When the magnetic drive 165 is in the first tripped position 177 or the second tripped position 179, the magnetic element 163, the moving magnet 169, the central shaft 167, the support 161, and part of the yoke 173 form a magnetic circuit, which helps the magnetic drive 165 to be stably held in the first tripped position 177 or the second tripped position 179.

[0089] Please see Figure 5 , Figure 6 , Figure 7 and Figure 12In some embodiments, one end of the central shaft 167 is bent relative to the axial extension direction of the central shaft 167 to form a drive portion 171; the trip switch 100 further includes a reset button 139, the reset button 139 having a free end 201 and a mounting end 203 that mates with the drive portion 171; the magnetic drive member 165 is located at the first trip position 177, and the free end 201 extends out of the base 109 of the trip switch 100; or, the magnetic drive member 165 is located at the second trip position 179, and the free end 201 is received within the base 109 of the trip switch 100.

[0090] The reset button 139 is used to receive external force to move the magnetic drive 165 from the tripped position to the initial position 150. During the process of the reset button 139 moving the magnetic drive 165 from the tripped position to the initial position 150, the magnetic drive 165 also drives the passive component 133 to reset, so that the passive component 133 no longer applies pressure to the re-fastening member 111 of the operating mechanism 110.

[0091] The mounting end 203 of the reset button 139 may be provided with a through hole 205, through which the driving part 171 can pass to mate with the reset button 139. In some embodiments, the driving part 171 can pass through the through hole 205 of the reset button 139 and the strip hole of the first driven member 135. In this way, when the reset button 139 is dragged by an external force, the magnetic drive member 165 can be moved to the initial position 150 at the same time, and the passive component 133 can be reset.

[0092] The base 109 may have an opening at the position corresponding to the reset button 139, so that the reset button 139 can extend out of the base 109 through the opening to accept external operation.

[0093] Furthermore, the tripping positions include a first tripping position 177 and a second tripping position 179. The position of the reset button 139 differs depending on the tripping position of the magnetic drive member 165. Specifically, when the magnetic drive member 165 is in the first tripping position 177, external operation is allowed to push the reset button 139. When the magnetic drive member 165 is in the second tripping position 179, the moving magnet 169 abuts against the support member 161. At this time, the reset button 139 is housed within the base 109, or partially exposed outside the base 109. Furthermore, external force pushing the reset button 139 will not cause a change in the position of the magnetic drive member 165, nor will it cause a change in the state of the passive component 133.

[0094] In some embodiments, the operating mechanism 110 includes a trip unit reset member 145; the operating handle 108 is connected to the trip unit reset member 145 via a drive shaft; when the magnetic drive member 165 is in the second trip position 179, the operating handle 108 can operably drive the drive shaft to rotate, and drive the trip unit reset member 145 to push the central shaft 167, so that the magnetic drive member 165 moves from the second trip position 179 to the initial position 150.

[0095] The operating handle 108 is located outside the base 109, allowing the magnetic drive component 165 to be moved from the second tripping position 179 to the initial position 150 by rotating the operating handle 108. A trip reset component 145 is located inside the base 109, fixedly connected to a lever 127, which is connected to the operating handle 108 via a drive shaft. Rotating the operating handle 108 also rotates the trip reset component 145. Through a reasonable spatial arrangement, the rotation of the trip reset component 145 pushes the central shaft 167 closer to one end of the second tripping position 179, thus pushing the magnetic drive component 165 from the second tripping position 179 to the initial position 150. Only after the magnetic drive component 165 has moved to the initial position 150 can the operating mechanism 110 be switched back to the locking state. This design also improves the safety of the entire trip switch.

[0096] This application embodiment also provides a trip unit 157 for a trip switch 100. The trip unit 157 includes: a magnetic yoke 173 forming a receiving space; a coil 159, a magnetic element 163, and a magnetic drive member 165 disposed within the receiving space; wherein the magnetic drive member 165 can be held in a first trip position 177, a second trip position 179, or an initial position 150 under the action of the magnetic field of the magnetic element 163, and when a first current is applied to the coil 159, the magnetic drive member 165 can be driven to move from the initial position 150 to the first trip position 177, or when a second current is applied to the coil 159, the magnetic drive member 165 can be driven to move from the initial position 150 to the second trip position 179; wherein the first current and the second current flow in opposite directions.

[0097] In this embodiment, the magnetic drive unit 165 can be controlled to move to the first tripping position 177 or the second tripping position 179 by applying a first current or a second current with different flow directions to the coil 159. The remaining parts can be explained with reference to the foregoing embodiments and will not be repeated here.

[0098] Please see Figure 13This application also provides a power conversion device 300. The power conversion device 300 includes: a power conversion circuit 301; an input circuit 303 and an output circuit 305 connected to the power conversion circuit; wherein the input circuit 303 and / or the output circuit 305 are provided with a trip switch 100 as described above.

[0099] In this embodiment, the power conversion device can be an inverter or a converter, etc. Specifically, the DC side of the inverter is the input current, and the AC side is the output circuit. A trip switch can be provided on either the DC side or the AC side of the inverter, or both. Similarly, the power conversion device can also be a converter, and a trip switch can be provided on either the input side or the output side, or both.

[0100] The functions and effects of this embodiment can be explained by referring to the foregoing implementation methods, and will not be repeated here.

[0101] It is understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0102] It is understood that the various implementation methods described in this application can be implemented individually or in combination, and the embodiments of this application are not limited in this respect.

[0103] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the aforementioned method implementations, and will not be repeated here.

[0104] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A trip switch, characterized in that, The trip switch includes an operating mechanism, a passive component, and a trip unit; The operating mechanism includes a locked state and a released state; The trip unit includes a magnetic element and a magnetic drive, the magnetic drive being used to provide power to the passive component; the magnetic drive has a first trip position, a second trip position, and an initial position between the first trip position and the second trip position relative to the magnetic element; wherein, the magnetic drive is held in the initial position by the magnetic force of the magnetic element, and the operating mechanism is held in the locked state; the magnetic drive is held in the first trip position or the second trip position by the magnetic force of the magnetic element, and the operating mechanism is held in the trip state. The passive component includes a first driven member and a second driven member; wherein the first driven member is coupled between the magnetic drive member and the second driven member; the second driven member includes a first working position and a second working position; when the magnetic drive member is held in the initial position, the second driven member is held in the first working position; the magnetic drive member moves from the initial position to the first tripping position or the second tripping position, and the first driven member drives the second driven member to move towards the second working position.

2. The trip switch according to claim 1, characterized in that, The first driven member includes: a first driving end and a second driving end that cooperate with the second driven member, a pivot shaft located between the first driving end and the second driving end, and a mating part that mates with the magnetic drive member; wherein the mating part is located between the first driving end and the pivot shaft, or the mating part is located between the second driving end and the pivot shaft; The magnetic drive component moves from the initial position to the first tripped position, causing the first driven component to rotate relative to the pivot axis along a first rotation direction, and the second drive end pushes the second driven component to move from the first working position to the second working position; or, The magnetic drive moves from the initial position to the second release position, causing the second driven member to rotate relative to the pivot axis along the second rotation direction, and the first drive end pushes the second driven member to move from the first working position to the second working position; wherein the second rotation direction is opposite to the first rotation direction.

3. The trip switch according to claim 2, characterized in that, The second driven member is slidably connected to the base of the trip switch.

4. The trip switch according to claim 3, characterized in that, A follower reset spring is provided between the second follower and the base of the trip switch; the follower reset spring applies a force to the second follower to keep the second follower in the first working position.

5. The trip switch according to claim 2, characterized in that, The second driven member has a pressure surface facing the operating mechanism; The first drive end of the first driven member is provided with a first lever, and the second drive end is provided with a second lever; The second driven member has a first groove for receiving the first lever and a second groove for receiving the second lever; wherein the first groove has a first groove wall near the pressure surface and the second groove has a second groove wall near the pressure surface; the first driven member rotates along the first rotation direction, and the first lever applies pressure to the first groove wall, pushing the second driven member from the first working position to the second working position; or, the first driven member rotates along the second rotation direction, and the second lever applies pressure to the second groove wall, pushing the second driven member from the first working position to the second working position.

6. The trip switch according to claim 5, characterized in that, The second follower includes a first side arm and a second side arm, and a connecting arm that is fixedly connected to the first side arm and the second side arm; the first slide groove is disposed on the first side arm, the second slide groove is disposed on the second side arm, and the first slide groove, the second slide groove, the first side arm and the second side arm extend in the same direction.

7. The trip switch according to claim 1, characterized in that, The trip unit is provided with a coil. When current is applied to the coil, the generated electromagnetic field drives the magnetic drive member to move from the initial position to the first trip position, or drives the magnetic drive member to move from the initial position to the second trip position.

8. The trip switch according to claim 1, characterized in that, The magnetic drive component includes a central shaft and a moving magnetic component fixed on the central shaft; the trip unit is provided with a moving channel for the moving magnetic component to move. The positions held by the magnetic drive component under the action of the magnetic element include: the moving magnetic component being in the initial position in the middle of the moving channel, and the moving magnetic component being in the first and second tripping positions at one end of the moving channel.

9. The trip switch according to claim 8, characterized in that, At each of the two ends of the moving channel extending along the axis of the central axis, a support member is respectively provided and sleeved on the central axis. The central axis can move relative to the support member along the axis of the central axis. A buffer spring is provided between each support member and the moving magnet, and the buffer spring can apply a force toward the moving magnet toward the initial position.

10. The trip switch according to claim 8, characterized in that, The trip unit includes a magnetic yoke with a receiving space, the magnetic element and the moving magnet are received within the magnetic yoke, and the movement channel is formed within the receiving space of the magnetic yoke.

11. The trip switch according to claim 8, characterized in that, One end of the central shaft is bent relative to the axial extension direction of the central shaft to form a driving part; the trip switch also includes a reset button, the reset button having a free end and a mounting end that mates with the driving part; the magnetic drive member is located at the first trip position, and the free end extends out of the base of the trip switch; or, the magnetic drive member is located at the second trip position, and the free end is housed in the base of the trip switch.

12. The trip switch according to claim 11, characterized in that, The operating mechanism includes a trip unit reset component; The trip switch is equipped with an operating handle, which is connected to the trip reset member via a drive shaft. When the magnetic drive member is in the second trip position, the operating handle can operate to drive the drive shaft to rotate and drive the trip reset member to push the central shaft, so that the magnetic drive member moves from the second trip position to the initial position.

13. The trip switch according to claim 1, characterized in that, The operating mechanism includes: a re-fastener, a locking fastener, and a jumping fastener; wherein, the re-fastener abuts against the locking fastener, so that the jumping fastener is locked by the locking fastener, and the operating mechanism is in the locked state; The re-fastener releases the locking fastener, the jump fastener is released, and the operating mechanism is in the disengaged state.

14. A power conversion device, characterized in that, The power conversion device includes: Power conversion circuit; An input circuit and an output circuit connected to the power conversion circuit; wherein the input circuit and / or the output circuit are provided with a trip switch as described in any one of claims 1 to 13.

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