Release, release switch and power conversion device

Abstract

The utility model provides a release, a release switch and a power conversion device. The release is used for releasing the switch; the tripping switch comprises an operating mechanism with a locking state and a tripping state; the operating mechanism comprises a locking state and a releasing state; the release comprises a magnetic element and a magnetic driving piece; wherein the magnetic driving part can be respectively kept at a plurality of positions under the action of magnetic force provided by the magnetic element; wherein part of the positions correspond to the locking state of the operating mechanism, and part of the positions correspond to the tripping state of the operating mechanism. And the stability of the power conversion device can be integrally improved.

Description

Technical Field

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

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

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

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

[0005] In a first aspect, embodiments of this application provide a trip unit for use as a trip switch; the trip switch includes an operating mechanism having a latching state and a tripping state; the trip unit includes a magnetic element and a magnetic drive member, wherein the magnetic drive member can be held in multiple positions under the magnetic force provided by the magnetic element; wherein some positions correspond to the latching state of the operating mechanism, and some positions correspond to the tripping state of the operating mechanism.

[0006] Optionally, the trip unit is provided with a coil, and when current is applied to the coil, the resulting electromagnetic field drives the magnetic actuator to change position and provides power to the passive component.

[0007] 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 in the middle of the moving channel, or the moving magnetic component being in a tripped position at one end of the moving channel.

[0008] Optionally, the tripping position includes a first tripping position and a second tripping position located on both sides of the initial position; the magnetic drive member is capable of moving from the initial position to the first tripping position or the second tripping position.

[0009] 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.

[0010] Optionally, the trip unit includes a magnetic yoke with a receiving space, the magnetic element and the moving magnet being received within the magnetic yoke, and the movement channel being formed within the receiving space of the magnetic yoke.

[0011] Secondly, embodiments of this application provide a trip switch, the trip switch including an operating mechanism, a passive component and a trip unit as described above, the magnetic drive member being connected to the passive component; the operating mechanism includes a locking state and a tripping state; the passive component, under the power provided by the magnetic drive member, can apply pressure to the operating mechanism, driving the operating mechanism to change from the locking state to the tripping state.

[0012] Optionally, the trip switch further includes a reset button, the reset button having a free end and a mounting end that mates with the central shaft of the trip unit; the magnetic drive is located in a first trip position, the free end extending out of the base of the trip switch; or, the magnetic drive is located in a second trip position, the free end being housed within the base of the trip switch; wherein, when the magnetic drive is located in the first trip position, the free end can push the magnetic drive from the first trip position to the initial position under the action of an external force.

[0013] Optionally, the operating mechanism includes a trip unit reset component; the trip switch is provided with an operating handle, which is connected to the trip unit reset component via a transmission shaft; when the magnetic drive component is in the second trip position, the operating handle can operably drive the transmission shaft to rotate, and drive the trip unit reset component to push the central shaft, so that the magnetic drive component moves from the second trip position to the initial position.

[0014] Optionally, the passive component includes a first follower and a second follower, wherein the first follower has a first end that mates with the magnetic drive and a second end that mates with the second follower, and the first end and the second end of the first follower are connected to the base of the trip switch via a first pivot.

[0015] Optionally, the operating mechanism includes a re-fastener, a locking fastener, and a trip fastener; wherein, the operating mechanism has a locked state in which the re-fastener abuts against the locking fastener, causing the trip fastener to be locked by the locking fastener, and a released state in which the re-fastener releases the locking fastener, causing the trip fastener to be released; the second follower is connected to the base of the trip switch via a second pivot, and the second follower has a cam, the second follower rotates relative to the second pivot under the drive of the first follower, the cam applies pressure to the re-fastener, driving the operating mechanism to change from the locked state to the released state.

[0016] Optionally, the cam includes a first protrusion and a second protrusion that are far apart from each other, and the tripping position includes a first tripping position and a second tripping position located on both sides of the initial position; wherein, the magnetic drive moves from the initial position toward the first tripping position, causing the first protrusion to apply pressure to the re-fastening member; or, the magnetic drive moves from the initial position toward the second tripping position, causing the second protrusion to apply pressure to the re-fastening member.

[0017] Optionally, the second end of the first driven member is provided with a first tooth, and the second driven member has a second tooth, wherein the first tooth meshes with the second tooth.

[0018] Optionally, the first end of the first follower is provided with a strip-shaped hole, which extends along the direction from the first end to the second end; one end of the central shaft is bent relative to the axial extension direction of the central shaft to form a driving part, which extends into the strip-shaped hole.

[0019] Optionally, a slider is provided between the cam and the re-fastener, the slider is connected to the base via a slide rail, and the cam applies pressure to the re-fastener by driving the slider.

[0020] Thirdly, 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.

[0021] The various embodiments provided in this specification improve the stability of the trip switch by incorporating magnetic elements in the trip unit, thereby enabling the magnetic drive component to be held in the desired position and reducing malfunctions caused by abnormal trip switch disconnection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the trip switch provided in one embodiment of this specification.

[0023] Figure 2 This is a schematic diagram of the operating mechanism provided in one embodiment of the present specification; wherein the operating mechanism is in a locked state and the trip switch having the operating mechanism is in a closed state.

[0024] Figure 3 This is a schematic diagram of the operating mechanism provided in one embodiment of the present specification; wherein the operating mechanism is in a locked state and the trip switch having the operating mechanism is in an open state.

[0025] Figure 4 This is a schematic diagram of the operating mechanism provided in one embodiment of this specification; wherein the operating mechanism is in a disengaged state.

[0026] Figure 5 This is a schematic diagram of the internal structure of the base of a trip switch provided in one embodiment of this specification; wherein the magnetic drive component of the trip unit is in the initial position.

[0027] Figure 6 This is a schematic diagram of the internal structure of the base of a trip switch provided in one embodiment of this specification; wherein the magnetic drive component of the trip unit is in the second position.

[0028] Figure 7 This is a schematic diagram of the internal structure of the base of a trip switch provided in one embodiment of this specification; wherein the magnetic drive component of the trip unit is in the first position.

[0029] Figure 8 A perspective view of a first follower provided for one embodiment of this specification.

[0030] Figure 9 A perspective view of a second follower provided for one embodiment of this specification.

[0031] Figure 10 This is a schematic diagram of the internal structure of a trip unit provided for one embodiment of this specification.

[0032] Figure 11 A perspective view of a reset button provided for one embodiment of this specification.

[0033] Figure 12 This is a functional block diagram of a power conversion device provided for one embodiment of this specification.

[0034] Explanation of reference numerals in the attached figures

[0035] 100. Trip switch; 103. Operating layer; 105. Unit layer; 107. Cover plate; 108. Operating handle; 109. Base; 110. Operating mechanism; 111. Re-fastener; 112. Locking position of locking fastener and re-fastener; 113. Locking fastener; 114. Locking position of skip fastener and locking fastener; 115. Skip fastener; 117. Main tension spring; 119. Upper connecting rod; 121. Skip fastener spring; 123. Lower connecting rod; 125. Transmission component; 127. Lever; 129. Frame; 131. Re-fastener spring; 133. Passive component; 135. First driven component; 137. Second driven component; 138. First pivot; 139. Reset button; 140. Second pivot; 141. Slider; 143. Slide rail; 145. Trip unit reset component; 147, strip hole; 149, first tooth; 150, initial position; 151, first protrusion; 153, second protrusion; 155, second tooth; 157, trip unit; 159, coil; 161, support component; 163, magnetic element; 165, magnetic drive component; 167, central shaft; 169, moving magnetic component; 170, moving channel; 171, drive unit; 173, magnetic yoke; 175, buffer spring; 177, first trip position; 179, second trip position; 181, first end; 183, second end; 185, free end; 187, mounting end; 189, through hole; 300, power conversion device; 301, power conversion circuit; 303, input circuit; 305, output circuit. Detailed Implementation

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

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

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

[0039] In the description of this specification, 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly specified.

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

[0041] In the description of this specification, unless otherwise expressly defined, the terms "installation," "connection," "joining," "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 specification according to the specific circumstances.

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

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

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

[0045] The trip unit 157 includes a magnetic element 163 and a magnetic drive member 165. The magnetic drive member 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 disengaged state of the operating mechanism 110. Specifically, the magnetic drive member 165 can be held in two or more positions under the magnetic force of the magnetic element 163. The positions that the magnetic drive member 165 can hold include at least the positions corresponding to the locking state of the operating mechanism 110 and the positions corresponding to the disengaged state of the operating mechanism 110.

[0046] 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.

[0047] Please see Figure 2 , Figure 3 and Figure 4 In some embodiments, the operating mechanism 110 includes a frame 129, a lever 127, an upper connecting rod 119, a lower connecting rod 123, a jump fastener 115, a locking fastener 113, a re-fastener 111, a main tension spring 117, a jump fastener spring 121, and a re-fastener locking spring 131.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] The re-fastener 111 is disposed between the first side plate and the second side plate, and is rotatably connected to the frame 129. The re-fastener 111 is located on one side of the locking fastener 113. The re-locking spring 131 acts between the locking fastener 113 and the re-fastener 111. Under its action, when the trip switch 100 is in the closed state, the trip fastener 115 engages (locks) with the locking fastener 113. At the same time, the re-fastener 111 abuts or locks against the locking fastener 113, so that the operating mechanism 110 is stably held in the locked state. In some cases, pressure is applied to the re-fastener 111, causing the re-fastener 111 and the locking fastener 113 to rotate relative to each other, so that the locking fastener 113 is released, thereby releasing the trip fastener 115. Specifically, the trip fastener 115 will disengage from the locking fastener 113 under the action of the trip spring 121, so that the operating mechanism 110 is in the tripped state.

[0053] 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.

[0054] 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 entire operating mechanism 110 forms a stable locking state. At this time, the upper connecting rod 119 and the lower connecting rod 123 are in a straight state. When the 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 between 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 member 125 to rotate, realizing the opening of the circuit.

[0055] Please see Figure 5 , Figure 6 and Figure 7 In some embodiments, the trip switch 100 may further include a passive component 133. The passive component 133, under the power provided by the trip unit 157, can apply pressure to the re-clamping member 111, driving the operating mechanism 110 to change from a latched state to a tripped state. In this embodiment, the magnetic drive member 165 can provide power to the passive component 133.

[0056] The passive component 133 includes a first follower 135 and a second follower 137. The first follower 135 has a first end 181 that engages with the magnetic drive member 165 and a second end 183 that engages with the second follower 137. The first end 181 and the second end 183 of the first follower 135 are connected to the base 109 of the trip switch 100 via a first pivot 138. The direction of movement of the second end 183 is opposite to the direction of movement of the magnetic drive member 165. Specifically, since the first pivot 138 is located at the initial position 150 of the first follower 135, when the magnetic drive member 165 applies a pushing force to the first end 181, the first follower 135 will rotate relative to the first pivot 138, causing the direction of movement of the second end 183 to be opposite to the direction of movement of the first end 181, i.e., the direction of movement of the second end 183 is opposite to the direction of movement of the magnetic drive member 165. This arrangement allows for better utilization of the internal space of the base 109 of the trip switch 100. That is, the trip unit 157 and the operating mechanism 110 can be arranged side by side, so that the internal space of the base 109 can be used more rationally. Of course, in some embodiments, the passive component 133 may not be limited to the first driven member 135 and the second driven member 137. It may also be just a single passive member. One end of the passive member is connected to the magnetic drive member 165, and the other end of the passive member can be used to apply pressure to the re-fastening member 111. Specifically, the passive member is fixed to the base 109 by a pivot. Under the action of the magnetic drive member 165, the transmission member 125 rotates, so that the passive member applies pressure to the re-fastening member 111 to drive the operating mechanism 110 from the locked state to the released state.

[0057] Please refer to the following: Figures 5 to 9 In some embodiments, the second follower 137 is connected to the base 109 of the trip switch 100 via a second pivot 140, and the second follower 137 has a cam that rotates relative to the second pivot 140 under the drive of the first follower 135. The cam applies pressure to the re-fastening member 111, driving the operating mechanism 110 to change from the locking state to the tripping state.

[0058] The second follower 137 is connected to the base 109 via the second pivot 140, allowing the second follower 137 to rotate relative to the base 109. The second follower 137 has a cam, and during the rotation of the second follower 137, the distance between the cam and the re-fastener 111 changes. That is, when the edge of the cam moves close to the re-fastener 111, the cam surface of the cam can apply pressure to the re-fastener 111, causing the re-fastener 111 to rotate under the pressure, releasing the locking element 113 and the jumping element 115, so that the operating mechanism 110 changes from the locked state to the disengaged state.

[0059] In this embodiment, a cam is used to apply pressure to the fastener 111. The structure is relatively simple and very stable and reliable, which can ensure that the passive component 133 has good reliability.

[0060] In some embodiments, the cam includes a first protrusion 151 and a second protrusion 153 that are far apart from each other, and the tripping positions include a first tripping position 177 and a second tripping position 179 located on both sides of the initial position 150, respectively. For example... Figure 10 As shown in the diagram. The magnetic drive member 165 moves from the initial position 150 toward the first release position 177, causing the first protrusion 151 to apply pressure to the re-fastening member 111; or, the magnetic drive member 165 moves from the initial position 150 toward the second release position 179, causing the second protrusion 153 to apply pressure to the re-fastening member 111.

[0061] like Figure 9 As shown. The cam may include a first protrusion 151 and a second protrusion 153, the extension directions of the first protrusion 151 and the second protrusion 153 may be opposite. Thus, during the rotation of the cam, pressure can be applied to the re-fastening member 111 by either the first protrusion 151 or the second protrusion 153 respectively. Furthermore, the movement direction of the magnetic drive member 165 will affect the rotation direction of the first follower 135, thus affecting the rotation direction of the cam driven by the first follower 135. Specifically, during the movement of the magnetic drive member 165 from the initial position 150 to the first disengagement position 177, it will drive the cam to rotate clockwise, causing the first protrusion 151 to apply pressure to the re-fastening member 111, causing the operating mechanism 110 to change from the locking state to the disengagement state. As the magnetic drive 165 moves from the initial position 150 to the second release position 179, it drives the cam to rotate counterclockwise, causing the second protrusion 153 to apply pressure to the re-fastening member 111, thus changing the operating mechanism 110 from the locking state to the release state.

[0062] In this embodiment, by providing multiple protrusions on the cam, and according to the different directions of the movement of the magnetic drive 165 from the initial position 150, different protrusions are driven to apply pressure to the re-fastener 111. This allows different driving methods to be used to select the appropriate protrusions to apply pressure to the re-fastener 111 according to the needs of various working conditions, thereby driving the operating mechanism 110 to change from the locking state to the disengaging state.

[0063] In some embodiments, the second end 183 of the first follower 135 is provided with a first tooth 149, and the second follower 137 has a second tooth 155, wherein the first tooth 149 meshes with the second tooth 155.

[0064] In this embodiment, a first tooth 149 is provided at the second end 183 of the first follower 135. The second follower 137 can be driven to rotate relatively stably through the meshing relationship between the first tooth 149 and the teeth of the second follower 137. The first tooth 149 at the second end 183 of the first follower 135 can be distributed in an arc shape, and the center of the first tooth 149 is located at the axis of the first pivot 138.

[0065] Please see Figure 8 In some embodiments, a first end 181 of the first follower 135 is provided with a strip hole 147, which extends along a direction from the first end 181 to the second end 183; one end of the central shaft 167 is bent relative to the axial extension direction of the central shaft 167 to form a drive portion 171, which extends into the strip hole 147.

[0066] In this embodiment, the central shaft 167 moves linearly along the axial extension direction. During the rotation of the first driven member 135, the distance between the driving part 171 and the first pivot 138 of the first driven member 135 changes. By providing a strip-shaped hole 147 extending along the first end 181 to the second end 183, a certain distance is provided for the change in distance between the driving part 171 and the first pivot 138, so that the central shaft 167 can drive the first driven member 135 to rotate relative to the first pivot 138 relatively stably and smoothly.

[0067] The central shaft 167 extends longitudinally along the axial extension direction. To ensure a more stable engagement with the first driven member 135, one end of the central shaft 167 is bent relative to the axial extension direction to form a driving part 171. In some embodiments, the extension direction of the driving part 171 is perpendicular to the axial extension direction. In this case, the driving part 171 extends into the slotted hole 147 and can make good contact with the hole wall of the slotted hole 147 when the central shaft 167 moves along the axial extension direction, thereby driving the first driven member 135 to move.

[0068] Please see Figure 5 In some embodiments, a slider 141 is provided between the cam and the re-fastener 111. The slider 141 is connected to the base 109 via a slide rail 143. The cam applies pressure to the re-fastener 111 by driving the slider 141.

[0069] The slide rail 143 is fixedly connected to the base 109 and serves to guide the slider 141. Specifically, when the slider 141 is driven by the cam, it extends along the extension direction of the slide rail 143, thus restricting the movement path of the slider 141. Furthermore, the extension direction of the slide rail 143 is towards the fastener 111, allowing the slider 141, moving along the slide rail 143, to apply pressure to the fastener 111 more accurately.

[0070] The surface of slider 141 facing the re-fastener 111 can be a pressure-applying surface for applying pressure to the re-fastener 111. The surface of slider 141 facing the cam can be a pressure-receiving surface for receiving the pressure applied by the cam and transmitting that pressure to the re-fastener 111. In some embodiments, a slider return spring is also provided on the slide rail 143, which provides a force to slider 141 away from the re-fastener 111. This is so that as the magnetic drive 165 moves to the initial position 150, the slider return spring pushes slider 141 away from the re-fastener 111.

[0071] Please see Figure 5 and Figure 10 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.

[0072] The magnetic drive component 165 can be made of a ferromagnetic material, allowing it to be held in a designated position under the magnetic force of the magnetic element 163. It is understood that for the magnetic drive component 165 to be held in one position, an additional force is required, greater than the magnetic force generated by the magnetic element 163 that holds it in the current position, causing a change in its position. After the additional force is removed, the magnetic drive component 165 can be held in the changed position again under the magnetic force of the magnetic element 163. Specifically, when the operating mechanism 110 is in the locked state, the magnetic drive component 165 is held in its position under the magnetic force of the magnetic element 163, thus maintaining the passive component 133 in its current state, ensuring that the operating mechanism 110 is stably held in the locked state. Similarly, when the operating mechanism 110 is in the disengaged state, the magnetic drive 165 is also held in its position by the magnetic force of the magnetic element 163, and the operating mechanism 110 is stably held in the disengaged state. Furthermore, after the trip unit 157 is reset, that is, when the magnetic drive 165 is driven to the position corresponding to the locking state of the operating mechanism 110, the operating mechanism 110 can be changed to the locking state.

[0073] In this embodiment, the magnetic element 163 can hold the magnetic drive mechanism in multiple positions. Since different positions correspond to the locking or releasing states of the operating mechanism 110, the operating mechanism 110 can also be held in the corresponding state. This improves the overall stability of the trip switch 100.

[0074] In some embodiments, the trip unit 157 is provided with a coil 159, and when current is applied to the coil 159, the resulting electromagnetic field drives the magnetic drive member 165 to change position.

[0075] A coil 159 is provided inside the trip unit 157. When the coil 159 is energized, an electromagnetic field is generated, which drives the magnetic actuator 165 to change position. Specifically, the current intensity in the coil 159 affects the strength of the generated electromagnetic field. The greater the current intensity flowing through the coil 159, the stronger the generated electromagnetic field and the greater the magnetic force on the magnetic actuator 165. The smaller the current intensity flowing through the coil 159, the weaker the generated electromagnetic field. Thus, by specifying the current intensity flowing through the coil 159, an electromagnetic field of appropriate strength can be generated, so that the magnetic force generated by the electromagnetic field can overcome the magnetic force exerted by the magnetic element 163 on the magnetic actuator 165 to maintain its current position, allowing the magnetic actuator 165 to change its current position under the action of the magnetic force generated by the electromagnetic field. Specifically, when the magnetic drive 165 is driven to move by the electromagnetic field, the magnetic drive 165 can provide power to the passive component 133 so that, under the power provided by the trip unit 157, pressure is applied to the re-fastening member 111 of the operating mechanism 110.

[0076] 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.

[0077] 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 150 in the middle of the moving channel 170, or the moving magnet 169 being in a tripped position at one end of the moving channel 170.

[0078] When the magnetic drive component 165 is driven to move, it can move along the axial extension direction, changing the position of the magnetic drive component 165. The moving magnetic component 169 is made of ferromagnetic material, so that the moving magnetic component 169 can be subjected to the magnetic force of a magnetic field. The moving magnetic component 169 can be sleeved on the central shaft 167 and fixedly connected to the central shaft 167. Of course, the moving magnetic component 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.

[0079] 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.

[0080] In this embodiment, the magnetic drive 165 may include an initial position 150 and a tripped position. Specifically, the initial position 150 of the magnetic drive 165 is defined as the position of the moving magnetic element 169 in the moving channel 170. At this time, the travel distance that the magnetic drive 165 can move is half the length of the moving channel 170. In some embodiments, the magnetic element 163 is located near the middle region of the moving channel 170, and the moving magnetic element 169 is relatively stably positioned in the initial position 150 of the moving channel 170 under the action of the magnetic field of the magnetic element 163, that is, the entire magnetic drive 165 is also relatively stably positioned in the initial position 150.

[0081] In some embodiments, the tripping positions include a first tripping position 177 and a second tripping position 179 located on either side of the initial position 150; the magnetic drive member 165 is capable of moving from the initial position 150 to either the first tripping position 177 or the second tripping position 179. Specifically, during the movement of the magnetic drive member 165, it provides power to the passive component 133 to apply pressure to the operating mechanism 110, driving the operating mechanism 110 to change from the locking state to the tripping state.

[0082] In some cases, the position of the magnetic drive 165 can change relative to the movement channel 170, for example, moving to one end of the movement channel 170. During the movement of the magnetic drive 165, power is supplied to the passive component 133, causing the operating mechanism 110 to change from a locked state to a released state. At this time, the passive component 133, under the action of the magnetic drive 165, applies pressure to the re-fastening member 111, causing the operating mechanism 110 to enter the released state. When the magnetic drive 165 remains in this position, the re-fastening member 111 will also continue to be under pressure from the passive component 133. Thus, when the magnetic drive 165 is at one end of the movement channel 170, it is defined as the first released position 177, and when the magnetic drive 165 is at the other end of the movement channel 170, it is defined as the second released position 179. Specifically, during the process of the magnetic drive component 165 moving from the initial position 150 to the first release position 177 or the second release position 179, the travel distance of the magnetic drive component 165 is half of the travel channel 170. Through the adaptive design, the distance that the passive component 133 drives the re-fastener 111 to move can enable the operating mechanism 110 to change to the release state.

[0083] 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.

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

[0085] When the magnetic drive member 165 moves to the tripped position, the moving magnet 169 approaches a support member 161 and compresses the buffer spring 175 between the moving magnet 169 and the support member 161. At this time, the buffer spring 175 applies a spring force to the magnetic drive member 165, pushing it towards the initial position 150. However, in this embodiment, the thrust provided by the buffer spring 175 is less than the magnetic force applied by the magnetic element 163 to the magnetic drive member 165 to maintain it in the tripped position. Thus, the magnetic drive member 165 remains in the tripped position even without additional force acting on it. Furthermore, during the movement of the magnetic drive member 165 from the initial position 150 to the tripped position, it is subjected to the spring force of the buffer spring 175, which provides a buffer for the movement of the magnetic drive member 165 to the tripped position, reducing the impact between the magnetic drive member 165 and the support member 161 when it moves to the tripped position.

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

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

[0088] In some embodiments, the moving magnet 169, the central shaft 167, and the support 161 are all made of magnetically permeable material. When the magnetic drive 165 is in the tripped 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 held in the tripped position.

[0089] Please refer to the following: Figures 5 to 7 and Figure 11 In some embodiments, the trip switch 100 further includes a reset button 139 having a free end 185 and a mounting end 187 that mates with the central shaft 167; the magnetic drive 165 is located in the first trip position 177, and the free end 185 extends out of the base 109 of the trip switch 100; or, the magnetic drive 165 is located in the second trip position 179, and the free end 185 is received within the base 109 of the trip switch 100.

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

[0091] The mounting end 187 of the reset button 139 may be provided with a through hole 189. One end of the central shaft 167 is bent relative to the axial extension direction of the central shaft 167 to form a driving part 171. The driving part 171 can pass through the through hole 189 to achieve mating between the driving part 171 and the reset button 139. In some embodiments, the driving part 171 can pass through the through hole 189 of the reset button 139 and the strip hole 147 of the first driven member 135. In this way, when the reset button 139 is dragged by an external force, the magnetic drive member 165 can be pushed to the initial position 150 at the same time, and the passive component 133 can be reset.

[0092] The base 109 may have an opening at the position corresponding to the reset button 139, so that the free end 185 of the reset button 139 can extend out of the base 109 through the opening to facilitate external operation.

[0093] Furthermore, the position of the reset button 139 differs depending on the tripping position of the magnetic drive component 165. This allows the direction of the current in the coil 159 to be controlled according to actual needs, so that the magnetic drive component 165 moves to the first tripping position 177 or the second tripping position 179 under the influence of the electromagnetic field. When the magnetic drive component 165 is in the first tripping position 177, external operation is allowed to push the free end 185 of the reset button 139. When the magnetic drive component 165 is in the second tripping position 179, the reset button 139 is housed within the base 109, or partially exposed outside the base 109, and external force pushing the reset button 139 will not cause a change in the position of the magnetic drive component 165, nor will it cause a change in the state of the passive component 133.

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

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

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

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

[0098] Please see Figure 12 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.

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

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

[0101] It is understood that in the various embodiments of this specification, 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 specification.

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

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

[0104] The above description is merely a specific embodiment of this specification, 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 specification 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 unit, characterized in that, The trip unit is used for tripping switches; the tripping switch includes an operating mechanism having a locked state and a tripped state; The trip unit includes a magnetic element and a magnetic drive component, wherein the magnetic drive component can be held in multiple positions under the magnetic force provided by the magnetic element; wherein some positions correspond to the locking state of the operating mechanism, and some positions correspond to the tripping state of the operating mechanism.

2. The trip unit according to claim 1, characterized in that, The trip unit is equipped with a coil, and when current is applied to the coil, the resulting electromagnetic field drives the magnetic actuator to change position.

3. The trip unit 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 position held by the magnetic drive component under the action of the magnetic element includes: the initial position where the moving magnetic component is located in the middle of the moving channel, or the disengaged position where the moving magnetic component is located at one end of the moving channel.

4. The trip unit according to claim 3, characterized in that, The tripping positions include a first tripping position and a second tripping position located on both sides of the initial position; the magnetic drive component is capable of moving from the initial position to the first tripping position or the second tripping position.

5. The trip unit according to claim 3, characterized in that, 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.

6. The trip unit according to claim 4, characterized in that, The trip unit includes a magnetic yoke with a receiving space, the magnetic element and the moving magnet are received within the magnetic yoke, and the movement channel is formed within the receiving space of the magnetic yoke.

7. A trip switch, characterized in that, The trip switch includes an operating mechanism, a passive component, and a trip unit as described in any one of claims 1 to 6, wherein the magnetic drive is connected to the passive component; The passive component can apply pressure to the operating mechanism under the power provided by the magnetic drive, driving the operating mechanism to change from the locked state to the released state.

8. The trip switch according to claim 7, characterized in that, The trip switch further includes a reset button, which has a free end and a mounting end that mates with the central shaft of the trip unit; the magnetic drive is located in a first trip position, with the free end extending out of the base of the trip switch; or, the magnetic drive is located in a second trip position, with the free end housed within the base of the trip switch. When the magnetic drive component is in the first tripping position, the free end can push the magnetic drive component from the first tripping position to the initial position under the action of an external force.

9. The trip switch according to claim 7, characterized in that, The operating mechanism includes a trip unit reset component; The trip switch is provided with an operating handle, which is connected to the trip unit reset member. When the magnetic drive member is in the second trip position, the operating handle can operate the trip unit reset member to push the magnetic drive member, so that the magnetic drive member moves from the second trip position to the initial position.

10. The trip switch according to claim 7, characterized in that, The passive component includes a first follower and a second follower, wherein the first follower has a first end that mates with the magnetic drive and a second end that mates with the second follower, and the first end and the second end of the first follower are connected to the base of the trip switch via a first pivot.

11. The trip switch according to claim 10, characterized in that, The operating mechanism includes a re-fastener, a locking fastener, and a jump fastener; wherein, the operating mechanism has a locking state in which the re-fastener abuts against the locking fastener, causing the jump fastener to be locked by the locking fastener, and a disengaged state in which the re-fastener releases the locking fastener, causing the jump fastener to be released; The second follower is connected to the base of the trip switch via a second pivot, and the second follower has a cam. The second follower rotates relative to the second pivot under the drive of the first follower. The cam applies pressure to the re-fastening member, driving the operating mechanism to change from the locked state to the tripped state.

12. The trip switch according to claim 11, characterized in that, The cam includes a first protrusion and a second protrusion that are far apart from each other, and the tripping positions include a first tripping position and a second tripping position located on both sides of the initial position; Wherein, the magnetic drive member moves from the initial position toward the first release position, causing the first protrusion to apply pressure to the re-fastening member; or, the magnetic drive member moves from the initial position toward the second release position, causing the second protrusion to apply pressure to the re-fastening member.

13. The trip switch according to claim 11, characterized in that, The second end of the first driven member is provided with a first tooth, and the second driven member has a second tooth, and the first tooth meshes with the second tooth.

14. The trip switch according to claim 13, characterized in that, The magnetic drive component includes a central shaft; a first end of the first follower is provided with a strip-shaped hole, the strip-shaped hole extending along the direction from the first end to the second end; one end of the central shaft is bent relative to the axial extension direction of the central shaft to form a drive portion, the drive portion extending into the strip-shaped hole.

15. The trip switch according to claim 11, characterized in that, A slider is provided between the cam and the re-fastener. The slider is connected to the base via a slide rail. The cam applies pressure to the re-fastener by driving the slider.

16. 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 7 to 15.

Images