Tripping switch and power conversion device

Abstract

The application provides a trip switch and a power conversion device. The trip switch comprises a tripper with a trip lever, wherein the trip lever can be driven to an initial position or a trigger position; an operating mechanism comprising a lock state and a trip state, wherein the operating mechanism is in the lock state and the trip lever is in the initial position; the trip lever is moved from the initial position to the trigger position, triggering the operating mechanism to change to the trip state; a locking member; a driver capable of driving the locking member to a stop position; wherein the locking member in the stop position can prevent the trip lever from being driven from the trigger position to the initial position. The safety of the trip switch and 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.

[0003] However, if the fault is not eliminated after the trip unit disconnects the switching mechanism, and the trip switch is accidentally reset, it can pose some safety hazards. Utility Model Content

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

[0005] In a first aspect, embodiments of this application provide a trip switch, comprising: a trip unit having a trip lever; wherein the trip lever can be driven to an initial position or a triggered position; an operating mechanism including a latching state and a tripping state; wherein the operating mechanism is in the latching state and the trip lever is in the initial position; the trip lever moves from the initial position to the triggered position, triggering the operating mechanism to change to the tripping state; a locking member; and a driver capable of driving the locking member to a stop position; wherein the locking member in the stop position prevents the trip lever from being driven from the triggered position to the initial position.

[0006] 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 at least one of the input circuit and the output circuit is provided with a trip switch as described above.

[0007] The various embodiments provided in this application, by setting a locking element in the trip switch, prevent the trip lever of the trip unit from resetting to the initial position when the operating mechanism is in the tripped state, thereby keeping the operating mechanism in the tripped state, reducing the risk of accidentally resetting the trip switch, and improving safety. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of a trip switch provided in one embodiment of this application.

[0009] Figure 2 This is a partially cutaway structural diagram of the operating mechanism provided in one embodiment of this application; wherein the operating mechanism is in a locked state, and the trip switch having the operating mechanism is in a closed state.

[0010] Figure 3 This is a partially cutaway structural diagram of the operating mechanism provided in one embodiment of this application; wherein the operating mechanism is in a disengaged state.

[0011] Figure 4 This is a schematic diagram of the internal structure of the base of a trip switch partially cut open according to an embodiment of this application; wherein the passive component is in the first working position and the locking component is in the released position.

[0012] Figure 5 This is a schematic diagram of the internal structure of the base of a trip switch partially cut open according to an embodiment of this application; wherein the passive component is in the second working position and the locking component is in the released position.

[0013] Figure 6 This is a schematic diagram of the internal structure of the base of a trip switch partially cut open according to an embodiment of this application; wherein the passive component is in the first working position and the locking component is in the stop position.

[0014] Figure 7 This is a schematic diagram of the internal structure of the base of a trip switch partially cut open according to an embodiment of this application; wherein the passive component is in the second working position and the locking component is in the stop position.

[0015] Figure 8 This is a schematic diagram of the passive component provided in one embodiment of this application.

[0016] Figure 9 This is a schematic internal cross-sectional view of a trip unit provided in one embodiment of this application.

[0017] Figure 10 This is a schematic diagram of the structure of a locking element provided in one embodiment of this application.

[0018] Figure 11 A perspective view of a driver provided for one embodiment of this application.

[0019] Figure 12 This is a schematic diagram of the structure of a reset operation component provided in one embodiment of this application.

[0020] Figure 13 This is a schematic diagram of the mounting bracket provided in one embodiment of this application.

[0021] Figure 14This is a schematic diagram of the structure of the operating mechanism, trip unit, locking element, and driver provided in one embodiment of this application.

[0022] Figure 15 This is a schematic diagram of the structure of the operating mechanism, trip unit, locking element, and driver provided in one embodiment of this application.

[0023] Figure 16 A functional block diagram of a power conversion device provided in one embodiment of this application. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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 locking member 200, a trip unit 157, and a driver 215 are disposed within the internal space enclosed by the base 109 and the cover plate 107. The base 109 may have good mechanical strength to provide support for the operating mechanism 110 and the trip unit 157. The unit layer 105 may include a moving contact, a stationary contact, and an arc-extinguishing system, etc.

[0032] 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 disconnects 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.

[0033] Under the power provided by the trip unit 157, the trip lever 167 of the trip unit 157 applies pressure to the re-fastener 111, driving the operating mechanism 110 to change from the locked state to the released state.

[0034] Please refer to the following: Figure 4 and Figure 9 The trip unit 157 includes a magnetic element 163 and a magnetic drive component 165. The magnetic drive component 165 can provide power to the trip lever 167. The magnetic drive component 165 can be held in multiple positions under the magnetic force provided by the magnetic element 163. 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] The lever 127 has an overall U-shaped structure and includes a first side arm, a second side arm, and a connecting arm, which connects the first and second side arms. The first and second side arms 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.

[0039] 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 latch 116. The latch 116 can be locked with the locking fastener 113. The other end of the jump fastener 115 is provided with a jump fastener spring attachment part 118. Furthermore, the jump fastener 115 is also hinged to one end of the upper connecting rod 119.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In some embodiments, the operating mechanism 110 further includes a trip unit reset member 201. This trip unit reset member 201 is fixedly connected to a lever 127, which is connected to an operating handle 108 via a drive shaft. Rotating the operating handle 108 can also rotate the trip unit reset member 201. Through a reasonable spatial arrangement, during the rotation of the trip unit reset member 201, the trip lever 167 can be pushed closer to the trigger position, thus pushing the trip lever 167 from the trigger position to the initial position. Only after the trip lever 167 has moved to the initial position can the operating mechanism 110 be changed back to the locking state. This arrangement also improves the safety of the entire trip switch.

[0045] In this embodiment, the trip unit reset member 201 has an idle position and a reset position. When the trip lever 167 of the trip unit 157 is in the triggered position and the trip unit reset member 201 is in the idle position, the trip unit reset member 201 will move away from the trip lever 167, and when the trip unit reset member 201 is rotated by the lever 127, it will move towards the reset position. Specifically, the trip unit reset member 201 will move towards the trip lever 167, and as the trip unit reset member 201 moves to the reset position, it will push the trip lever 167 back from the triggered position to the initial position.

[0046] Please see Figure 4 and Figure 5 and Figure 9In some embodiments, the passive element 133, under the power provided by the trip unit 157, can apply pressure to the operating mechanism 110, driving the operating mechanism 110 to change from a locked state to a released state. In some embodiments, the passive element 133 and the trip lever 167 of the trip unit 157 can be integrally formed, and both are collectively referred to as the trip lever 167, having the function of the passive element 133 described in this specification. Of course, in some embodiments, the passive element 133 and the trip lever 167 are independent components, but there is a mating relationship between them, and after mating, they can also be collectively referred to as the trip lever 167. This will be further described below.

[0047] Passive component 133 has a first working position (e.g.) Figure 4 The position of the passive component) and the second working position (e.g. Figure 5 (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 element 133 is connected to the magnetic drive element 165. For example, the passive element 133 and the magnetic drive element 165 can be fixedly connected or detachably connected. In some embodiments, please refer to [further details omitted]. Figure 8 and Figure 9 The passive component 133 includes a mounting portion 135 and a pressure-applying portion 137, the mounting portion 135 being connected to the magnetic drive component 165. Specifically, the mounting portion 135 has a mounting groove 138 on its surface facing the trip unit 157. The mounting groove 138 has 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. The magnetic drive component 165 partially 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, that is, the portion of the magnetic drive component 165 extending into the mounting groove 138 is located within the slot 139. Thus, a fixed connection is achieved 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 fixed connection method. It is also possible to provide a screw hole in the mounting portion 135 of the passive component 133 and provide a thread on the magnetic drive component 165, so that 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 includes: a first extension arm 181 forming 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.

[0051] 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 axial extension direction of the trip lever 167 inside the trip unit 157, and the extension direction of the intermediate connecting arm 185 is the same as the axial extension direction of the trip lever 167. Thus, the distance by which the first extension arm 181 and the second extension arm 183 are offset from the axial extension direction of the trip lever 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.

[0052] 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 pressure applied to the operating mechanism 110. By providing a reinforcing rib 187 between the second extending arm 183 and the intermediate connecting arm 185, the mechanical strength of the second extending arm 183 can be increased and the deformation of the second extending arm 183 can be reduced.

[0053] Please see Figure 4 and Figure 9 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.

[0054] 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.

[0055] 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.

[0056] In this embodiment, the magnetic drive 165, under the magnetic force of the magnetic element 163, can keep 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.

[0057] 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 displace relative to the magnetic element 163 and drives the trip lever 167 to move from the initial position to the trigger position.

[0058] 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 drive member 165 to change position through the magnetic force generated by the electromagnetic field. 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 drive member 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 drive member 165 to maintain its current position, allowing the magnetic drive member 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.

[0059] 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.

[0060] In some embodiments, the magnetic drive 165 includes a tripping rod 167 and a moving magnetic element 169 fixed on the tripping rod 167; the tripping device 157 is provided with a moving channel 170 for the moving magnetic element 169 to move; wherein, the position held by the magnetic drive 165 under the action of the magnetic element 163 includes: the moving magnetic element 169 being located at a first position 177 on the side of the moving channel 170 closer to the passive element, or the moving magnetic element 169 being located at a second position 179 on the side of the moving channel 170 away from the passive element.

[0061] The trip lever 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 trip lever 167 and fixedly connected to the trip lever 167. Of course, the moving magnetic member 169 can also be directly integrally formed with the trip lever 167. In some embodiments, the trip lever 167 can also be made of ferromagnetic material, or the trip lever 167 can be made of magnetically permeable material. In this embodiment, the end of the trip lever 167 near the passive member 133 is fixedly connected to the mounting portion 135 of the passive member 133. Specifically, a circumferential flange 143 is provided along the circumference of the end of the trip lever 167 near the passive member 133. 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 trip lever 167 is fixedly connected to the driven member 133.

[0062] 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 trip lever 167. That is, the trip lever 167 can pass through the movement channel 170 along its extension direction, so that when the trip lever 167 moves along its axis, the moving magnetic element 169 changes position along the movement channel 170.

[0063] In this embodiment, the trip lever 167 may include an initial position and a triggered position. Specifically, when the trip lever 167 is in the initial position, the moving magnet 169 is in the first position 177, and the corresponding driven member 133 is in the first working position. When the trip lever 167 is in the triggered position, the moving magnet 169 moves from the first position 177 to the second position 179, which will drive the driven member 133 to move from the first working position to the second working position. That is, when the trip lever 167 is in the triggered position, the corresponding driven member 133 is in the second working position.

[0064] In some embodiments, the two ends of the moving channel 170 extending along the axis of the trip lever 167 are respectively provided with support members 161 sleeved on the trip lever 167, and the trip lever 167 can move relative to the support members 161 along the axis of the trip lever 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 to the moving magnet 169 toward the initial position.

[0065] The support member 161 can be used to limit the position of the trip lever 167, so that the trip lever 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 limits 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 closer to the first position 177 is less than the length of the buffer spring 175 closer to the second position 179. Of course, the lengths of the buffer springs 175 on both sides of the moving magnet 169 may also be the same.

[0066] When the trip lever 167 is in the initial position, the moving magnet 169 will approach a support member 161. At this time, the buffer spring 175 may not apply any 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. During the process of the trip lever 167 moving to the trigger position, 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. Of course, when the trip lever 167 is held in the trigger position, the force applied by the buffer spring 175 to the moving magnet 169 is less than the magnetic force exerted by the magnetic element 163 on the moving magnet 169, allowing the trip lever 167 to remain in the trigger position under the action of the magnetic force. Furthermore, during the process of the trip lever 167 moving from the initial position to the trigger position, the buffer spring 175 can provide a certain degree of cushioning, reducing the impact between the moving magnet 169 and the support member 161 when it moves to the second position 179.

[0067] 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.

[0068] The yoke 173 forms a closed magnetic flux path, making the magnetic field of the magnetic element 163 more concentrated, which helps to hold the magnetic drive 165 in a more stable position. For example, it holds the trip lever 167 in the initial or triggered position.

[0069] In some embodiments, the moving magnet 169, the trip lever 167, and the support 161 are all made of magnetically permeable material. When the trip lever 167 is in the triggered position, the magnetic element 163, the moving magnet 169, the trip lever 167, the support 161, and part of the magnetic yoke 173 form a magnetic circuit, which helps the trip lever 167 to be stably held in the initial position or the triggered position.

[0070] In some cases, when the controller (not shown) of the power converter 300 detects a fault in the internal components of the power converter 300 or a connected external device, the controller can send a control signal to the trip switch 100 to cause the trip unit 157 to drive the trip lever 167 to the trigger position, thereby putting the operating mechanism 110 in the tripped state. During on-site operations, workers may operate the operating handle 108 of the trip switch 100 without identifying the cause of the fault, to push the trip lever 167 back to its initial position via the trip unit reset member 201, thus restoring the operating mechanism 110 to the locked state. However, after restoring the trip switch 100 to the locked state, the power converter 300 or external device may resume operation. Since the cause of the fault has not been eliminated, powering on at this time poses a safety hazard.

[0071] In some embodiments, please refer to the following: Figure 4 and Figure 7 The driver 215 can drive the locking member 200 to the stop position; wherein, the locking member 200 in the stop position can prevent the trip lever 167 from being driven from the trigger position to the initial position.

[0072] In this embodiment, when the locking member 200 is in the stop position, it can prevent the trip lever 167 from being driven from the triggered position to the initial position. Thus, even if an operator attempts to use the trip reset member 201 of the trip switch 100 to return the trip lever 167 to the initial position during on-site operations, the locking member 200 will prevent this, thereby keeping the trip lever 167 in the triggered position and the operating mechanism 110 in the tripped state, thus improving the overall safety of the trip switch 100.

[0073] In this embodiment, please refer to Figure 4 , Figure 5 and Figure 7 The trip lever 167 can be moved from its initial position to the triggered position first, and then the locking member 200 can be driven to the stop position to prevent the trip lever 167 from being accidentally returned to its initial position. Of course, in some embodiments, please refer to... Figure 4 , Figure 6 and Figure 7 Alternatively, the locking element 200 can be driven independently to the stop position first, and then the trip lever 167 can be driven to the trigger position.

[0074] In this embodiment, the locking member 200 is moved by an independent driver 215, so that the locking member 200 can be driven independently, and the function of the locking member 200 has good stability.

[0075] In this embodiment, the driver 215 may have a similar functional structure to the trip unit 157, and is named driver 215 for easy distinction.

[0076] In some embodiments, the locking member 200 in the stop position can prevent the trip unit reset member 201 from moving from the idle position to the reset position.

[0077] In this embodiment, the locking member 200 is in the stop position, which can prevent the trip unit reset member 201 from moving towards the reset position, so that the trip unit reset member 201 cannot push the trip lever 167 back to the initial position. In this way, it is difficult for the operator to restore the trip lever 167 to the initial position by the trip unit reset member 201 before the locking member 200 is reset, thereby reducing the safety hazards caused by easy reset.

[0078] In some embodiments, when the trip unit reset member 201 is in the idle position, there is a space interval 203 between it and the trip lever 167 in the trigger position; wherein, when the locking member 200 is in the stop position, it extends into the space interval 203.

[0079] In this embodiment, the trip unit reset member 201 and the trip lever 167 are independent components. This reduces their direct correlation, allowing for more flexible movement of the trip lever 167 and facilitating a rapid transition from the initial position to the trigger position. To prevent spatial interference caused by the trip unit reset member 201 during the movement of the trip lever 167 from the initial position to the trigger position, a spatial gap 203 exists between the trip unit reset member 201 in the idle position and the trip lever 167 in the trigger position. This ensures that the movement of the trip lever 167 is not affected, reliably driving the operating mechanism 110 from the locked state to the released state.

[0080] Furthermore, during the movement of the trip unit reset member 201 from the idle position to the reset position, the trip unit reset member 201 will pass through the spatial interval 203. In this embodiment, when the locking member 200 is in the stop position, it will extend into the spatial interval 203. Thus, during the operation of the trip unit reset member 201 moving towards the trip lever 167, it will be blocked by the locking member 200. This makes it difficult for the trip unit reset member 201 to push the trip lever 167, and the trip lever 167 is held in the triggered position.

[0081] In some embodiments, the locking member 200 further has a release position; when the locking member 200 is in the release position, the trip unit reset member 201 is allowed to move from the idle position to the reset position.

[0082] In this embodiment, multiple functions of the trip switch 100 can be achieved by changing the position of the locking member 200. When the locking member 200 is in the released position, it does not obstruct the trip unit reset member 201, allowing the trip unit reset member 201 to move from the idle position to the reset position. Furthermore, as the trip unit reset member 201 moves towards the reset position, it pushes the trip lever 167 from the trigger position to the initial position, thus resetting the trip unit 157. Specifically, when the locking member 200 is in the released position, it avoids the space interval 203 between the trip unit reset member 201 and the trip lever 167, ensuring that the trip unit reset member 201 is not obstructed by the locking member 200.

[0083] In some embodiments, please refer to Figure 4 , Figure 7 and Figure 10 The locking member 200 has a rotating shaft 205 and a stop portion 207; the locking member 200 is mounted on the operating mechanism 110 via the rotating shaft 205 and can be driven to rotate relative to the rotating shaft 205 to the stop position or the release position; wherein, when the locking member 200 is in the stop position, the stop portion 207 prevents the trip unit reset member 201 from moving from the idle position to the reset position.

[0084] In this embodiment, the locking member 200 is pivotally mounted within the operating mechanism 110, which helps to make efficient use of the internal space of the operating mechanism 110. Furthermore, the locking member 200 can be driven to rotate to a stop position or a release position, which also facilitates switching of the locking member 200 between multiple positions.

[0085] In this embodiment, the stop portion 207 is rotatable around the rotation axis 205. When the locking member 200 is in the stop position, the stop portion 207 extends into the space interval 203 between the trip unit reset member 201 and the trip lever 167. When the locking member 200 is in the release position, the stop portion 207 moves away from the space interval 203. In this way, the locking member 200 can rotate within a small angle range, thus realizing the switching between the stop position and the release position.

[0086] In one specific embodiment, the stop portion 207 is fixedly connected to the rotating shaft 205 via the first rotating arm 209. The locking member 200 as a whole is rotatable around the axis of the rotating shaft 205, and is in a stopped position or a released position. In some embodiments, the stop portion 207 extends longitudinally, and its longitudinal extension direction may be parallel to the axis of the rotating shaft 205. When the locking member 200 is in the stopped position or the released position, the stop portion 207 will rotate around the axis of the rotating shaft 205 to different positions, so that in the stopped position, the stop portion 207 will extend into the space interval 203 between the trip unit reset member 201 and the trip lever 167, and in the released position, the stop portion 207 will leave the space interval 203.

[0087] In some embodiments, please refer to Figure 4 , Figure 10 and Figure 11 The driver 215 has a drive rod 217; the locking member 200 also includes a drive part 211 rotatably connected to the drive rod 217; the driver 215 can drive the drive rod 217 to rotate the locking member 200 to the stop position or the release position.

[0088] In this embodiment, the driver 215 has a drive rod 217 that can be driven to move. The functional structure of the drive rod 217 can be found in the description of the trip lever 167, and will not be repeated here.

[0089] In this embodiment, since the locking member 200 rotates as a whole relative to the axis of the rotating shaft 205, and the driving rod 217 moves as a whole along its longitudinal extension direction, to facilitate the engagement of the driving rod 217 with the driving part 211, the driving rod 217 can be connected to the driving part 211 through the driving groove 219. The driving groove 219 is a strip-shaped groove, and the extension direction of the strip-shaped groove is perpendicular to the longitudinal extension direction of the driving rod 217. Thus, during the movement of the driving rod 217 along its longitudinal direction, the displacement of the driving rod 217 along its longitudinal direction is converted into the driving part 211 driving the overall rotation of the locking member 200.

[0090] In this embodiment, the drive unit 211 can be connected to the rotating shaft 205 via the second rotating arm 213. Thus, the drive unit 211 can drive the locking member 200 to rotate relative to the axis of the rotating shaft 205 via the second rotating arm 213.

[0091] In some embodiments, the specific structure of the driver 215 may differ from that of the trip unit 157. The specific power principle of the driver 215 may also differ from that of the trip unit 157. For example, the driver 215 may use a motor as its power source, and the motor may drive the drive rod 217 to move.

[0092] In some embodiments, please refer to Figure 11 and Figure 12 The drive rod 217 has a first end 221 and a second end 223 that are far apart from each other. The drive rod 217 is connected to the drive unit 211 through the first end 221, and the second end 223 of the drive rod 217 is connected to a reset operation member 225; when the locking member 200 is in the stop position, the reset operation member 225 can operably push the drive rod 217 to move the locking member 200 to the release position.

[0093] In this embodiment, the drive rod 217 can drive the drive unit 211, causing the locking member 200 to rotate relative to the axis of the rotating shaft 205, thus rotating the locking member 200 from the released position to the stop position. Furthermore, the drive rod 217 can be held in the stop position to keep the operating mechanism 110 locked in the tripped state. In some cases, after troubleshooting, it is necessary to restore normal operation, which requires resetting the locking member 200. This can be done by resetting the operating member 225, which drives the locking member 200 to rotate from the stop position to the released position via the drive rod 217. Then, the trip unit 157 can be reset by the trip unit reset member 201, thereby restoring the operating mechanism 110 to the locked state, achieving the state where the trip switch 100 is closed and resumes normal operation.

[0094] In this embodiment, the reset operating member 225 may have an operating end 227 and a connecting end 229. The connecting end 229 may be provided with a connecting hole 231. Correspondingly, the second end 223 of the drive rod 217 may be provided with a bent portion, which can extend into the connecting hole 231, so that the drive rod 217 can drive the reset operating member 225 to move together. Furthermore, when it is necessary to change the position of the locking member 200 from the stop position to the release position, the operator can manually operate the operating end 227 and drive the locking member 200 to the release position through the drive rod 217.

[0095] In some embodiments, please refer to Figure 13 The operating mechanism 110 is provided with a mounting bracket 233 for mounting the locking member 200; the mounting bracket 233 has a shaft core 235 for sleeved on the rotating shaft 205, and an arc-shaped limiting groove 237 centered on the shaft core 235; the stop part 207 is partially located in the arc-shaped limiting groove 237.

[0096] In this embodiment, in order to improve the positional accuracy of the locking member 200 when it moves to the stop position, a structure for limiting the rotation range of the locking member 200 can be set so that the locking member 200 can move accurately to the stop position or the release position, thereby improving the reliability of the trip switch 100.

[0097] In this embodiment, the mounting bracket 233 has a frame 239, which can be fixed to the first side plate and / or the second side plate of the operating mechanism 110, so that the position of the locking member 200 can be stably defined by the mounting bracket 233. The rotation shaft 205 of the locking member 200 can be sleeved on the shaft core 235, so that the locking member 200 can rotate relative to the mounting bracket 233. Furthermore, the stop portion 207 of the locking member 200 is partially located in the arc-shaped limiting groove 237, so that when the locking member 200 rotates around the axis of the rotation shaft 205, the stop portion 207 will move along the arc-shaped limiting groove 237. Thus, the rotation range of the locking member 200 is defined by setting the arc-shaped limiting groove 237. In this embodiment, the arc of the arc-shaped limiting groove 237 is centered on the shaft core 235. Thus, after the rotating shaft 205 is sleeved on the shaft core 235, the stop part 207 will also rotate around the shaft core 235. That is, the stop part 207 and the arc-shaped limiting groove 237 are concentrically arranged, so that the stop part 207 can move smoothly along the arc-shaped limiting groove 237.

[0098] In this embodiment, one end of the arc-shaped limiting groove 237 corresponds to the stop position of the locking member 200, and the other end corresponds to the release position of the locking member 200. In this way, the stop portion 207 of the locking member 200 can be driven to move along the arc-shaped limiting groove 237, and can be accurately limited to the stop position or the release position.

[0099] In some embodiments, please refer to the following: Figure 14 and Figure 15 The trip lever 167 has a limiting part 241. When the trip lever 167 is in the trigger position and the locking member 200 is in the stop position, the locking member 200 engages with the limiting part 241 to prevent the trip lever 167 from moving from the trigger position to the initial position.

[0100] In this embodiment, the locking member 200 can be used to lock the position of the trip lever 167. That is, when the trip lever 167 is in the triggered position, the locking member 200 can cooperate with the limiting part 241 to prevent the trip lever 167 from moving towards the initial position. Specifically, when the trip unit reset member 201 applies a pushing force to the trip lever, the trip lever 167 is held in the triggered position due to the obstruction of the locking member 200. This reduces the probability of the trip switch being turned on due to misoperation, thus improving safety.

[0101] In this embodiment, the limiting portion 241 of the trip lever 167 can serve as a stop surface. The trip lever 167 can move between its initial position and the stop position, forming a movement path. Furthermore, the actuator 215 can drive the locking member 200 to rotate, causing the stop portion of the locking member 200 to extend into this movement path. Thus, after the trip lever 167 moves to the trigger position, the actuator 215 can drive the locking member 200 to rotate, causing the stop portion to penetrate deeper into the movement path. When the trip unit reset member 201 is driven to further push the trip lever 167, the limiting portion 241 is blocked by the stop portion of the locking member 200, preventing the trip lever 167 from moving to its initial position.

[0102] In this embodiment, the locking member 200 can be rotatably connected to the housing of the trip switch via the rotating shaft 243, so that the locking member 200 can rotate relative to the rotating shaft 243 under the drive of the driver 215, thereby moving between the release position and the stop position.

[0103] In some embodiments, the operating mechanism may also be provided with a locking return spring 245, which can apply a force to the locking member toward the release position. Thus, when the locking member 200 is in the release position, it can be stably held in the release position by the action of the locking return spring 245. During the process of the driver 215 driving the locking member 200 to rotate to the stop position, the elastic force of the locking return spring 245 is overcome.

[0104] Since the locking element can only rotate, after the stop extends into the through hole, it makes it difficult for the trip lever to move along its longitudinal extension direction, thereby limiting the position of the trip lever and keeping it in the triggered position.

[0105] Please see Figure 16 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 at least one of the input circuit 303 and the output circuit 305 is provided with a trip switch 100 as described above.

[0106] 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.

[0107] The functions and effects of this embodiment can be explained by referring to the foregoing implementation methods, and will not be repeated here.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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, include: A trip unit with a trip lever; wherein the trip lever can be driven to an initial position or a triggered position; The operating mechanism includes a locked state and a released state; wherein, when the operating mechanism is in the locked state, the release lever is in the initial position; the release lever moves from the initial position to the trigger position, triggering the operating mechanism to change to the released state; Locking components; The driver can drive the locking member to a stop position; wherein, the locking member in the stop position can prevent the trip lever from being driven from the trigger position to the initial position.

2. The trip switch according to claim 1, characterized in that, The operating mechanism includes a trip unit reset component; the trip unit reset component has an idle position and a reset position; wherein, during the process of the trip unit reset component moving from the idle position to the reset position, it pushes the trip lever from the trigger position to the initial position; Wherein, the locking member in the stop position can prevent the trip unit reset member from moving from the idle position to the reset position.

3. The trip switch according to claim 2, characterized in that, When the trip unit reset component is in the idle position, there is a spatial gap between it and the trip lever in the trigger position; When the locking member is in the stop position, it extends into the spatial interval.

4. The trip switch according to claim 2, characterized in that, The locking member also has a release position; when the locking member is in the release position, the trip unit reset member is allowed to move from the idle position to the reset position.

5. The trip switch according to claim 4, characterized in that, The locking member has a rotating shaft and a stop portion; the locking member is mounted on the operating mechanism via the rotating shaft and can be driven to rotate relative to the rotating shaft to the stop position or the release position; Wherein, the locking member is in the stop position, and the stop portion prevents the trip unit reset member from moving from the idle position to the reset position.

6. The trip switch according to claim 5, characterized in that, The driver has a drive rod; the locking member further includes a drive part rotatably connected to the drive rod. The driver can drive the drive rod to rotate the locking member, placing it in the stop position or the release position.

7. The trip switch according to claim 6, characterized in that, The drive rod has a first end and a second end that are far apart from each other; the drive rod is connected to the drive unit through the first end, and a reset operation element is connected to the second end of the drive rod; When the locking member is in the stop position, the reset operation member can operably push the drive rod to move the locking member to the release position.

8. The trip switch according to claim 5, characterized in that, The operating mechanism is provided with a mounting bracket for installing the locking component; The mounting bracket has a core for housing the rotating shaft and an arc-shaped limiting groove centered on the core; the stop portion is located within the arc-shaped limiting groove.

9. The trip switch according to claim 1, characterized in that, The trip lever has a limiting part. When the trip lever is in the trigger position and the locking member is in the stop position, the locking member engages with the limiting part to prevent the trip lever from moving from the trigger position to the initial position.

10. A power conversion device, characterized in that, The power conversion device includes: Power conversion circuit; An input circuit and an output circuit are connected to the power conversion circuit; wherein at least one of the input circuit and the output circuit is provided with a trip switch as described in any one of claims 1 to 9.

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