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, a driven part and a tripper; the operating mechanism comprises a locking state and a releasing state; the driven part has a first working position and a second working position; when the driven part moves from the first working position to the second working position, pressure can be applied to the operating mechanism, and the operating mechanism is driven to be changed into a tripping state from a locking state. The release comprises a magnetic element and a magnetic driving piece, and the magnetic driving piece is connected with the driven piece; wherein the magnetic driving part can enable the driven part to be kept at the first working position and enable the driven part to be kept at the second working position under the action of magnetic force provided by the magnetic element. 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 the field of power electronics. 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. Therefore, the stability of the trip switch has a significant impact on the power system using it. Summary of the Invention

[0003] This application provides a tripping switch and a power conversion device through various embodiments, which can improve the stability of the power conversion device to a certain extent.

[0004] In a first aspect, embodiments of this application provide a trip switch, the trip switch including an operating mechanism, a passive member, and a trip unit; the operating mechanism includes a latching state and a tripping state; the passive member has a first working position and a second working position; wherein, when the passive member moves from the first working position to the second working position, it applies pressure to the operating mechanism, driving the operating mechanism to change from the latching state to the tripping state; the trip unit includes a magnetic element and a magnetic drive member, the magnetic drive member being connected to the passive member; wherein, under the magnetic force provided by the magnetic element, the magnetic drive member can hold the passive member in the first working position and hold the passive member in the second working position.

[0005] Optionally, the passive component includes a mounting portion and a pressure-applying portion. The mounting portion is connected to the magnetic drive component. During the process of the passive component moving from the first working position to the second working position, the pressure-applying portion applies pressure to the operating mechanism.

[0006] Optionally, the passive component also has an operating part; the operating part extends out of the base of the trip switch, and when the passive component is in the second working position, the operating part can drive the passive component to move from the second working position to the first working position under the action of an external force.

[0007] Optionally, the passive component includes: a first extension arm forming the operating part and the mounting part, a second extension arm forming the pressure application part, and an intermediate connecting arm connected to the first extension arm and the second extension arm; wherein the first extension arm and the second extension arm extend in the same direction, and the extension direction of the intermediate connecting arm intersects the extension directions of the first extension arm and the second extension arm.

[0008] Optionally, a reinforcing rib is provided between the intermediate connecting arm and the second extending arm.

[0009] Optionally, the trip unit is provided with a coil, and when current is applied to the coil, the generated electromagnetic field drives the magnetic drive member to displace relative to the magnetic element, and can drive the magnetic drive member to move from the first working position to the second working position.

[0010] Optionally, the operating mechanism includes a re-fastener, a locking fastener, and a jump fastener; wherein, the re-fastener abuts against the locking fastener, and the jump fastener is locked by the locking fastener, so that the operating mechanism is in the locked state; the re-fastener releases the locking fastener, and the jump fastener is released, so that the operating mechanism is in the disengaged state.

[0011] 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 being in an initial position on the side of the moving channel closer to the passive component, and the moving magnetic component being in a tripped position on the side of the moving channel away from the passive component.

[0012] 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 to the moving magnet toward the initial position.

[0013] Optionally, the trip unit includes a magnetic yoke with a receiving space, the magnetic element and the moving magnet are received within the receiving space of the magnetic yoke, and the moving channel is formed within the receiving space.

[0014] 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 a trip switch as described above.

[0015] The multiple embodiments provided in this application, by setting a magnetic element in the trip unit, enable the magnetic driving component to drive the passive component to be held in a first working position or a second working position by the magnetic force of the magnetic element. The first working position corresponds to the locking state of the operating mechanism, and the second working position corresponds to the tripping state of the operating mechanism. In this way, the operating mechanism can be held in the locking state or the tripping state, thus improving the overall stability of the trip switch. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a trip switch provided in one embodiment of this application.

[0017] 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.

[0018] Figure 3 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.

[0019] Figure 4 This is a schematic diagram of the internal structure of the base of a trip switch provided in one embodiment of this application; wherein the passive component is in the initial position.

[0020] 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 passive component is in the tripped position.

[0021] Figure 6 This is a schematic diagram of the passive component provided in one embodiment of this application.

[0022] Figure 7 This is a schematic diagram of the internal structure of a trip unit provided in one embodiment of this application.

[0023] Figure 8 A functional block diagram of a power conversion device provided in one embodiment of this application.

[0024] Explanation of reference numerals in the attached figures

[0025] 100. Trip switch; 103. Operating layer; 105. Unit layer; 107. Cover plate; 108. Operating handle; 109. Base; 110. Operating mechanism; 111. Re-fastener; 113. Locking fastener; 115. Jump fastener; 117. Main tension spring; 119. Upper connecting rod; 121. Jump spring; 123. Lower connecting rod; 125. Transmission component; 127. Lever; 129. Frame; 131. Re-locking spring; 133. Passive component; 135. Mounting part; 137. Pressure applying part; 138. Mounting groove; 139. Slot; 140. Pressure surface; 41. Operating unit; 143. Circumferential flange; 157. Trip unit; 159. Coil; 161. Support member; 163. Magnetic element; 165. Magnetic drive member; 167. Central shaft; 169. Moving magnetic element; 170. Moving channel; 173. Magnetic yoke; 175. Buffer spring; 177. Initial position; 179. Trip position; 181. First extension arm; 183. Second extension arm; 185. Intermediate connecting arm; 187. Reinforcing rib; 300. Power conversion device; 301. Power conversion circuit; 303. Input circuit; 305. Output circuit. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] In the description of this application, unless otherwise expressly defined, the terms "above," "over," "on top of," "below," "below," "under," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "below," and "over" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0033] 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 member 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 member 133, and the trip unit 157. The unit layer 105 may include a moving contact, a stationary contact, and an arc-extinguishing system, etc.

[0034] In some embodiments, the operating mechanism 110 includes a latching state and a tripping state. When the operating mechanism 110 is in the latching state, the power conversion device using the tripping switch 100 can operate normally. The tripping state can be the state of the operating mechanism 110 when the tripping switch 100 can disconnect the moving contact and the stationary contact. Specifically, 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 latching 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 tripping 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.

[0035] The passive component 133 can apply pressure to the re-fastening component 111 under the power provided by the release device 157, driving the operating mechanism 110 to change from the locked state to the released state.

[0036] The trip unit 157 includes a magnetic element 163 and a magnetic drive component 165, the magnetic drive component 165 being able to provide power to the passive component 133; wherein, the magnetic drive component 165 can be held in multiple positions under the magnetic force provided by the magnetic element 163; wherein, some positions correspond to the locking state of the operating mechanism 110, and some positions correspond to the tripping state of the operating mechanism 110.

[0037] 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.

[0038] Please see Figure 2 and Figure 3 In some embodiments, the operating mechanism 110 may specifically include 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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-fastener 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. 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, such as... Figure 2 As shown. 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 jump fastener 115, as shown. Figure 3 As shown. Specifically, the jump fastener 115 will disengage from the locking fastener 113 under the action of the jump fastener spring 121, so that the operating mechanism 110 is in the disengaged state.

[0044] 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.

[0045] 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.

[0046] Please see Figure 4 and Figure 5 and Figure 6 In some embodiments, the passive element 133 can apply pressure to the operating mechanism 110 under the power provided by the trip unit 157, driving the operating mechanism 110 to change from a locked state to a released state.

[0047] Passive component 133 has a first working position (e.g.) Figure 5 The position of the passive component) and the second working position (e.g. Figure 6 (The position of the passive component). When the passive component 133 moves from the first working position to the second working position, it applies pressure to the re-fastener 111, driving the operating mechanism 110 to change from the locking state to the unlocking state.

[0048] The passive member 133 is connected to the magnetic drive member 165. For example, the passive member 133 and the magnetic drive member 165 can be fixedly connected or detachably connected. In some embodiments, the passive member 133 includes a mounting portion 135 and a pressure application portion 137, the mounting portion 135 being connected to the magnetic drive member 165. Specifically, the mounting portion 135 has a mounting groove 138 on its surface facing the trip unit 157, the mounting groove 138 having a bottom wall facing the trip unit 157, and a first side wall and a second side wall adjacent to the bottom wall. The area between the first side wall and the second side wall adjacent to the bottom wall has a first distance, and the area between the first side wall and the second side wall away from the bottom wall has a second distance, the first distance being greater than the second distance. Thus, slots 139 are formed in the areas of the first side wall and the second side wall adjacent to the bottom wall, respectively. The magnetic drive component 165 extends into the mounting groove 138, and the portion of the magnetic drive component 165 extending into the mounting groove 138 mates with the mounting groove 138, meaning that the portion of the magnetic drive component 165 extending into the mounting groove 138 is located within the slot 139. This achieves a fixed connection between the magnetic drive component 165 and the mounting portion 135 of the passive component 133. Of course, in some embodiments, the fixed connection between the magnetic drive component 165 and the passive component 133 is not limited to the aforementioned method. Alternatively, a screw hole can be provided in the mounting portion 135 of the passive component 133, and a thread can be provided on the magnetic drive component 165. Thus, the fixed connection between the magnetic drive component 165 and the passive component 133 is achieved by screwing the thread into the screw hole.

[0049] The pressure-applying part 137 has a pressure-applying surface 140 facing the operating mechanism 110, so that the passive member 133 can directly contact the re-fastening member 111 through the pressure-applying surface 140. Furthermore, during the process of the passive member 133 moving from the first working position to the second working position, the pressure-applying surface 140 directly applies pressure to the re-fastening member 111, so that the operating mechanism 110 changes from the locked state to the disengaged state.

[0050] In some embodiments, the passive member 133 further includes an operating part 141, and the mounting part 135 is located between the operating part 141 and the pressure application part 137; the operating part 141 extends out of the base 109 of the trip switch 100, and when the passive member 133 is in the second working position, the operating part 141 can drive the passive member 133 to move from the second working position to the first working position under the action of an external force.

[0051] The operating unit 141 is used to receive external operations to move the passive member 133 from the first working position to the second working position, or to move the passive member 133 from the second working position to the first working position. Since the passive member 133 is fixedly connected to the magnetic drive member 165, the magnetic drive member 165 will also move along with the passive member 133 as the operating unit 141 moves it. In some cases, after the passive member 133 moves from the first working position to the second working position, the operating mechanism 110 will be in a disengaged state. At this time, under the action of the trip unit 157, the passive member 157 will remain in the second working position, and the re-fastener 111 cannot lock the locking member, preventing the operating mechanism 110 from returning to the locked state. By providing the operating unit 141, an external force can be applied to the operating unit 141 to move the passive member 133 from the second working position to the first working position, causing the re-fastener 111 to reset, and the corresponding operating mechanism 110 can be restored to the locked state.

[0052] In some embodiments, the passive member 133 includes: a first extension arm 181 forming the operating portion 141 and the mounting portion 135; a second extension arm 183 forming the pressure application portion 137; and an intermediate connecting arm 185 connected to the first extension arm 181 and the second extension arm 183; wherein the first extension arm 181 and the second extension arm 183 extend in the same direction, and the extension direction of the intermediate connecting arm 185 intersects the extension directions of the first extension arm 181 and the second extension arm 183.

[0053] In this embodiment, the first extension arm 181 and the second extension arm 183 are connected by an intermediate connecting arm 185, such that the first extension arm 181 and the second extension arm 183 are spaced a certain distance apart. In some embodiments, the extension directions of the first extension arm 181 and the second extension arm 183 are perpendicular to the extension direction of the axis of the central shaft 167 inside the trip unit 157, and the extension direction of the intermediate connecting arm 185 is the same as the extension direction of the axis of the central shaft 167. Thus, the distance by which the first extension arm 181 and the second extension arm 183 are offset from the extension direction of the axis of the central shaft 167 is the length of the intermediate connecting arm 185. The shape of the passive member 133 can better utilize the internal space of the base 109 of the trip switch 100.

[0054] In some embodiments, a reinforcing rib 187 is provided between the intermediate connecting arm 185 and the second extending arm 183. In this embodiment, the second extending arm 183 is provided with a pressure-applying portion 137, so that the second extending arm 185 may deform due to a reaction force during the process of depressurization towards the operating mechanism 110. By providing a reinforcing rib 187 between the second extending arm 183 and the intermediate connecting arm 185, the stress intensity of the second extending arm 183 can be increased, and the deformation of the second extending arm 183 can be reduced.

[0055] Please see Figure 4 and Figure 7 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.

[0056] 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 the position of the magnetic drive component 165 to change. At this point, 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. In this embodiment, the magnetic drive component 165 and the passive component 133 are fixedly connected, so that the magnetic drive component 165 and the passive component 133 move in the same direction. This simplifies the internal structure of the base 109.

[0057] Specifically, when the passive member 133 is in the first working position, the operating mechanism 110 can be in a locked state, and the magnetic drive member 165 is held in its position by the magnetic force of the magnetic element 163. At this time, because the position of the magnetic drive member 165 is held, the passive member 133 is also held in the first working position, and the operating mechanism 110 is held in the locked state. Similarly, when the passive member 133 is in the second working position, the operating mechanism 110 can be in a disengaged state, and the magnetic drive member 165 is held in its position by the magnetic force of the magnetic element 163. At this time, because the position of the magnetic drive member 165 is held, the passive member 133 is also held in the second working position. At this time, the passive member 133 will apply pressure to the re-fastening member 111, so that the operating mechanism 110 is held in the disengaged state and cannot be returned to the locked state.

[0058] In this embodiment, the magnetic drive 165, under the magnetic force of the magnetic element 163, keeps the passive element 133 in a first working position or a second working position, thereby keeping the operating mechanism 110 in a locked or released state. This improves the overall stability of the trip switch 100.

[0059] In some embodiments, the trip unit 157 is provided with a coil 159. When current is applied to the coil 159, the resulting electromagnetic field drives the magnetic drive member 165 to move relative to the magnetic element 163 and can drive the magnetic drive member 165 to move from a first working position to a second working position.

[0060] 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 member 165 is moved by an electromagnetic field, it can provide power to the passive member 133, and the direction of the magnetic force applied to the magnetic drive member 165 can be adjusted according to the direction of current flow in the coil 159. When the passive member 133 is in the first working position, the direction of current flow when applied to the coil 159 can be controlled so that the direction of the magnetic force applied by the coil 159 to the magnetic drive member 165 is to push the passive member 133 towards the second working position. Alternatively, when the passive member 133 is in the second working position, the direction of current flow when applied to the coil 159 can be controlled so that the direction of the magnetic force applied by the coil 159 to the magnetic drive member 165 is to push the passive member 133 towards the first working position.

[0061] 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.

[0062] In some embodiments, the magnetic drive 165 includes a central shaft 167 and a moving magnet 169 fixed on the central shaft 167; the trip unit 157 is provided with a moving channel 170 for the moving magnet 169 to move; wherein, the position held by the magnetic drive 165 under the action of the magnetic element 163 includes: the moving magnet 169 being in an initial position on the side of the moving channel 170 closer to the passive member, or the moving magnet 169 being in a tripped position on the side of the moving channel 170 away from the passive member.

[0063] 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. In this embodiment, the end of the central shaft 167 near the passive member 133 is fixedly connected to the mounting portion 135 of the passive member 133. Specifically, at the end of the central shaft 167 near the passive member 133, a circumferential flange 143 is provided along the circumference of the central shaft 167. The circumferential flange 143 extends into the mounting groove 138 of the driven member 133, and the circumferential flange 143 extends into the retaining groove 139 in the mounting groove 138. In this way, the central shaft 167 and the driven member 133 are fixedly connected.

[0064] A movement channel 170 is formed within the trip unit 157 to provide movement space for the moving magnetic element 169 to change position within the trip unit 157. Specifically, the extension direction of the movement channel 170 is the same as the extension direction of the axis of the central shaft 167. That is, the central shaft 167 can pass through the movement channel 170 along its extension direction, so that when the central shaft 167 moves along its axis, the moving magnetic element 169 changes position along the movement channel 170.

[0065] In this embodiment, the magnetic drive component 165 may include an initial position 177 and a tripped position 179. Specifically, when the moving magnetic component 169 is in the initial position 177, the corresponding driven component 133 is in a first working position. When the moving magnetic component 169 moves from the initial position 177 to the tripped position 179, it will drive the driven component 133 from the first working position to the second working position. That is, when the moving magnetic component 169 is in the tripped position 179, the corresponding driven component 133 is in the second working position.

[0066] In some embodiments, the two ends of the moving channel 170 extending along the axis of the central axis are respectively provided with support members 161 sleeved on the central axis, and the central axis can move relative to the support members 161 along the axis of the central axis; 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 to the moving magnet 169 toward the initial position.

[0067] The support member 161 can be used to define the position of the central shaft, allowing it to move stably and smoothly along the axial 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. In some embodiments, the lengths of the buffer springs 175 on both sides of the moving magnet 169 may be different. The length of the buffer spring 175 near the initial position 177 is less than the length of the buffer spring 175 near the release position 179. Of course, the lengths of the buffer springs 175 on both sides of the moving magnet 169 may also be the same.

[0068] When the magnetic drive component 165 is in the initial position 177, the moving magnet 169 will approach a support component 161. At this time, the buffer spring 175 may not apply a force to the moving magnet 169, or the buffer spring 175 may apply a force to the moving magnet 169 to maintain it in the initial position 177. During the process of the magnetic drive component 165 moving to the tripped position 179, it will overcome the force of the buffer spring 175, that is, the buffer spring 175 will apply a force to the moving magnet 169 in the direction of the initial position 177. Of course, when the moving magnet 169 is held in the tripped position 179, the force applied by the buffer spring 175 to the moving magnet 169 is less than the magnetic force of the magnetic field applied by the magnetic element 163 to the moving magnet 169, so that the moving magnet 169 can be held in the tripped position 179 under the action of the magnetic field. Furthermore, during the movement of the moving magnetic component 169 from the initial position 177 to the tripping position 179, the buffer spring 175 can provide a certain degree of buffering, reducing the impact between the moving magnetic component 169 and the support component 161 when the moving magnetic component 169 moves to the tripping position 179.

[0069] 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.

[0070] 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 element 165 in a more stable position. For example, it holds the moving magnet 169 in the initial position 177 or the tripped position 179.

[0071] 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 disengaged position, 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 maintained in the initial position or the disengaged position.

[0072] 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 is used to fixally connect a passive member 133; the magnetic drive member 165 can, under the magnetic force provided by the magnetic element 163, hold the passive member 133 in a first working position and hold the passive member 133 in a second working position.

[0073] In this embodiment, the magnetic drive unit 165 can be controlled to move to a first working position or a second working position 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.

[0074] Please see Figure 8 This 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.

[0075] In this embodiment, the power conversion device 300 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 300 can also be a converter, and a trip switch can be provided on either the input side or the output side, or both.

[0076] The functions and effects of this embodiment can be explained by referring to the foregoing implementation methods, and will not be repeated here.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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 passive component has a first working position and a second working position; wherein, when the passive component moves from the first working position to the second working position, it applies pressure to the operating mechanism, driving the operating mechanism to change from the locking state to the disengaged state; The trip unit includes a magnetic element and a magnetic drive component, the magnetic drive component being connected to the passive component; wherein, the magnetic drive component, under the magnetic force provided by the magnetic element, can hold the passive component in a first working position and hold the passive component in a second working position.

2. The trip switch according to claim 1, characterized in that, The passive component includes a mounting part and a pressure-applying part. The mounting part is connected to the magnetic drive component. During the process of the passive component moving from the first working position to the second working position, the pressure-applying part applies pressure to the operating mechanism.

3. The trip switch according to claim 2, characterized in that, The passive component also has an operating part; The operating part extends out of the base of the trip switch. When the passive component is in the second working position, the operating part can drive the passive component to move from the second working position to the first working position under the action of external force.

4. The trip switch according to claim 3, characterized in that, The passive component includes: a first extension arm forming the operating part and the mounting part, a second extension arm forming the pressure part, and an intermediate connecting arm connected to the first extension arm and the second extension arm; wherein the first extension arm and the second extension arm extend in the same direction, and the extension direction of the intermediate connecting arm intersects the extension directions of the first extension arm and the second extension arm.

5. The trip switch according to claim 4, characterized in that, A reinforcing rib is provided between the intermediate connecting arm and the second extending arm.

6. 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 displace relative to the magnetic element and can drive the magnetic drive member to move from the first working position to the second working position.

7. The trip switch according to claim 1, characterized in that, The operating mechanism includes a re-fastener, a locking fastener, and a jump fastener; wherein the re-fastener abuts against the locking fastener, and the jump fastener is locked by the locking fastener, so that 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.

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 initial position where the moving magnetic component is located on the side of the moving channel closer to the passive component, and the disengaged position where the moving magnetic component is located on the side of the moving channel away from the passive component.

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 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 magnetic member. The buffer spring can apply a force to the moving magnetic member 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 receiving space of the magnetic yoke, and the moving channel is formed within the receiving space.

11. 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 10.

Images