Star contactor module, star-delta contactor module and star-delta starting switch

Abstract

The invention discloses a star contactor module, a star-delta contactor module and a star-delta starting switch, and the star contactor module comprises a star module housing, a first electromagnetic system, a first contact support, and a first contact assembly. The first contact assembly comprises three first moving contacts and three groups of first static conductive structures, and the three first moving contacts are in short circuit through short circuit pieces; each first static conductive structure comprises a first wiring section, a contact section and a second wiring section, and the first wiring section, the contact section and the second wiring section in the same first static conductive structure are always kept in a connected state on a circuit; the first electromagnetic system comprises a first armature which is arranged in a sliding mode, the first contact support and the first armature are arranged in a synchronous movement mode, the three contact sections are located below the three first moving contacts respectively, and connection and disconnection of a first contact assembly are achieved through sliding of the first contact support; the star contactor has the characteristic of independent modularization of the star contactor module.

Description

Technical Field

[0001] The present application relates to the electrical field of low-voltage switches, and is a star contactor module, a star-delta contactor module, and a star-delta starting switch. Background Art

[0002] In the field of electric motors, a star-delta starting circuit is often used to ensure that the motor can start normally. In the star-delta starting circuit, apart from some protective devices, the most important thing is that three contactors are required, namely the main contactor, the angle contactor, and the star contactor. The main contactor, the angle contactor, and the star contactor are connected. When the main contactor and the angle contactor are connected at the same time, the circuit presents a delta connection. When the main contactor and the star contactor are connected, the circuit presents a star connection. The star connection is used in the initial stage of the motor startup. After the motor has been running stably for a certain period of time, it is switched to the delta connection to complete the motor startup.

[0003] In conventional star-delta starting circuits, the main contactors, angle contactors, and star contactors are all installed separately. The advantage of this method is that the main contactors, angle contactors, and star contactors can all be directly used as commercially available contactors. Simply connect the main contactor, angle contactor, and star contactor, and then short-circuit the star contactor externally. Although the wiring is complicated, for manufacturers, there is less pressure on inventory because there are fewer internal specialized components, and all contactors can be sold as conventional contactors.

[0004] Continuous research by technicians in this field has led to the design of a star-delta starting switch specifically for star-delta starting circuits. For example, CN117153586A discloses a star-delta starting switch and motor starting circuit. The patent document indicates that, with the exception of the contact support and moving contact bridge within the main contactor assembly, and the angle moving contact bridge and star moving contact bridge within the star-delta contact assembly, all other components are distinct from those of conventional contactors. This means that the remaining components cannot be used in any other contactor product except for manufacturing this star-delta starting switch. This star-delta starting switch is highly integrated, requiring no additional wiring. However, because many of its internal components are specialized (specifically for this star-delta starting switch), this places an increased burden on manufacturers to prepare materials.

[0005] The same problem also occurs with star-sealing contactors, such as the AC star-sealing contactor disclosed in CN209675211U.

[0006] After extensive research, the inventors found that if they wanted to reduce the number of dedicated components as much as possible and relatively reduce the complexity of user wiring, the key was to modify the star contactor and make a star contactor module specifically for star connection. After getting it, users can freely match it with ordinary contactors to form a closed star contactor or a star-delta starting switch.

[0007] Therefore, how to design such a star contactor module professionally used for star connection is a direction worthy of research. Summary of the Invention

[0008] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a star contactor module, a star-delta contactor module, and a star-delta starting switch with advantages.

[0009] The present application provides: a star contactor module, which includes a star module housing, a first electromagnetic system, a first contact support, a first contact assembly and a reset structure; the first contact assembly includes three first moving contacts and three groups of first static conductive structures, the first moving contact is arranged on the first contact support and moves with the first contact support, and the three first moving contacts are short-circuited by a short-circuit member; each first static conductive structure includes a first wiring segment, a contact segment and a second wiring segment, and the first wiring segment, the contact segment and the second wiring segment in the same first static conductive structure always remain connected in the circuit; the first electromagnetic system includes a first armature arranged for sliding, the first armature includes a first contact segment and a second contact segment; the first armature includes a first armature and a first ... A contact support and a first armature are set for synchronous movement, and the three contact segments are respectively located below the three first moving contacts. The connection and disconnection of the first contact assembly are realized by the sliding of the first contact support; when the first electromagnetic system is energized, the first armature slides under the action of the magnetic field force of the first electromagnetic system, so that the first moving contact contacts the contact segment, thereby realizing the connection of the first contact assembly; the reset structure is a reset spring, one end of the reset spring is against the first contact support or the first armature, and the reset spring is used to drive the first contact support to reset after the first electromagnetic system is powered off, so that the first moving contact is separated from the contact segment, thereby realizing the disconnection of the first contact assembly.

[0010] The above structure creates a star contactor module with an independent electromagnetic system, allowing it to be used in conjunction with other contactors. When the star contactor module is connected to a circuit (with the first wiring segment connected to the load and the second wiring segment connected to other contactors), when the first contact structure is engaged, the first moving contact contacts the contact segment, activating the star contactor module and creating a star connection. When the first contact structure is disconnected, the first static conductive structure remains connected, acting as a connecting conductor. During this time, the star contactor module is inactive and does not affect other contactor connections (e.g., delta connection). This structure, since it only modifies the star contactor module, does not significantly alter the structure of other contactors. Most contactor manufacturers can maintain their stock of contactors. When a closed-star contactor or star-delta starting switch is needed, they simply pair this star contactor module with other contactors, significantly reducing the burden of stocking materials. Furthermore, since the star contactor module is already internally short-circuited, wiring is also very convenient.

[0011] In some embodiments of the present application, the short-circuit is a soft link, and the three first moving contacts are connected together through the soft link; or, the short-circuit is a hard link, and the three first moving contacts are connected together through the hard link; or, the short-circuit is a combination of a soft link and a hard link, wherein two first moving contacts are connected through a hard link, and the other first moving contact is connected to one or two of the two first moving contacts through a soft link.

[0012] There are many forms of short-circuit components, and their essence is how to electrically connect the three first moving contacts together. This short-circuit effect can be achieved by using soft connections, hard connections, or a combination of the two.

[0013] In some embodiments of the present application, the first wiring segment, the contact segment, and the second wiring segment are an integrally formed conductive bar, so that the three segments always maintain a connected state in the circuit.

[0014] In some embodiments of the present application, among the first wiring segment, the contact segment, and the second wiring segment, the first wiring segment and the contact segment are fixed by a first fastener, welded, or connected by a flexible connection, and the contact segment and the second wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, so that the three segments always maintain a connected state in the circuit; In some embodiments of the present application, among the first wiring segment, the contact segment, and the second wiring segment, the first wiring segment and the second wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, and the contact segment and the first wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, so that the three segments always maintain a connected state in the circuit; In some embodiments of the present application, among the first wiring segment, the contact segment, and the second wiring segment, the first wiring segment and the second wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, and the contact segment and the second wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, so that the three segments always maintain a connected state in the circuit; In some embodiments of the present application, two of the first wiring segment, the contact segment, and the second wiring segment are integrally formed, and the other one is fixed to the two integrally formed structures by a first fastener, welded, or softly connected to ensure that the three always remain connected in the circuit.

[0015] The first wiring segment, the contact segment, and the second wiring segment here always remain connected in the circuit, which means that the first static conductive structure is a "segment of conductor" (capable of conducting electricity) as a whole. However, there are many ways to compose this segment of conductor, such as an integrally molded conductive bar, or a split-molded structure fixed by flexible connection, welding, or fasteners.

[0016] In some embodiments of the present application, a reset structure is further included. The reset structure is a reset spring. One end of the reset spring is in contact with the first contact support or the first armature. The reset spring is used to drive the first contact support to reset after the first electromagnetic system is powered off, so as to separate the first moving contact from the contact segment.

[0017] The star contactor module can be reset by using a reset spring to separate the first moving contact from the contact segment, thereby completing the disconnection of the first contact assembly.

[0018] A star-delta contactor module, comprising a first contactor and the above-mentioned star contactor module; the first contactor comprises a second contact assembly, the second contact assembly comprises three second moving contacts, three second static contacts I, three second static contacts II, three first terminal blocks I and three first terminal blocks II, the second contact assembly having an on state and an off state; in the on state, the second moving contact is in contact with the corresponding second static contacts I and second static contacts II; in the off state, the second moving contact is separated from the corresponding second static contacts I and second static contacts II; the three first terminal blocks I are respectively conductively connected to the three second static contacts I, the three first terminal blocks II are respectively conductively connected to the three second static contacts II, and the three second wiring segments are respectively arranged in a one-to-one correspondence with the three first terminal blocks I and are fastened or softly connected or fixed by welding via second fasteners.

[0019] With this structure, by connecting the star contactor module to the first contactor, the effect of a closed star contactor can be achieved. Users can apply this star-delta contactor module to star-delta starting circuits or closed star contactor application scenarios.

[0020] In some embodiments of the present application, the first contactor further includes a first contactor housing, the first terminal block I portion extends to a first side surface of the first contactor housing, the star module housing is disposed on the first side surface of the first contactor housing, and the star module housing is connected to the first contactor housing.

[0021] This structure makes the connection between the first contactor and the star module housing more compact. At the same time, the star-delta contactor module formed in this way is lower in height than the star-delta contact device in the integrated star-delta starting switch in the prior art and is easy to disassemble for maintenance.

[0022] In some embodiments of the present application, it also includes an interlocking piece rotatably arranged in the first contactor housing or rotatably arranged in the star module housing; the first contact component and the second contact component are mechanically interlocked through the interlocking piece, the first contact support, and the second contact support, or the first contact component and the second contact component are mechanically interlocked through the interlocking piece, the first armature, and the second armature; the mechanical interlock is that when the first contact component is in the connected state, the second contact component cannot be connected and is in the disconnected state, and when the second contact component is in the connected state, the first contact component cannot be connected and is in the disconnected state.

[0023] By adopting the setting of the interlocking piece, the second contact assembly inside the first contactor can be mechanically interlocked with the first contact assembly in the star contactor module, so as to ensure that the circuit operates more stably.

[0024] In some embodiments of the present application, the interlocking member has a first locking portion and a second locking portion that are offset from the rotation center of the interlocking member; the first locking portion corresponds to the first contact support or the first armature, and the second locking portion corresponds to the second contact support or the second armature; when the first contact assembly is in the connected state, the interlocking member rotates under the action of the first contact support or the first armature, so that the second locking portion rotates to a position that limits the movement of the second contact support or the second armature, thereby preventing the second contact assembly from being connected; when the second contact assembly is in the connected state, the interlocking member, under the action of the second contact support or the second armature, causes the first locking portion to rotate to a position that limits the movement of the first contact support or the first armature, thereby preventing the first contact assembly from being connected.

[0025] The interlocking parts adopt the first locking part and the second locking part to achieve interlocking. Such a transmission structure is very streamlined and can switch back and forth according to the working status of different contactors (the different contactors here refer to the star contactor module and the first contactor). The switching is very smooth and the mechanical interlocking can be well achieved.

[0026] In some embodiments of the present application, an intermediate slider is further included, and the first contact component and the second contact component are mechanically interlocked through an interlocking piece, a first contact support, and a second contact support; the intermediate slider is slidingly arranged and is arranged between the interlocking piece and the first contact support and / or the second contact support, and the interaction relationship between the interlocking piece and the first contact support and / or the second contact support is completed through the intermediate slider.

[0027] The design of the intermediate slider reduces the size requirements for the first contact support and the second contact support. This effect is particularly evident when the intermediate slider is used to realize the function between the interlocking member and the second contact support.

[0028] In some embodiments of the present application, an interlocking member reset structure is further included. The interlocking member reset structure is arranged next to the interlocking member, one end of the interlocking member reset structure is against the interlocking member, and the other end is against the first contactor housing or the star module housing.

[0029] The setting of such a reset structure can achieve reset through the interlocking member reset structure when the interlocking member is driven.

[0030] A star-delta starting switch, comprising a second contactor and the above-mentioned star-delta contactor module; the second contactor comprises a second contactor housing and a third contact assembly, the third contact assembly comprises three third moving contacts, three third static contacts I, three third static contacts II, three second wiring boards I and three second wiring boards II, the third contact assembly has an on state and an off state; in the on state, the third moving contact contacts the corresponding third static contacts I and third static contacts II; in the off state, the third moving contact contacts the corresponding third static contacts I and II Contact I and the third static contact II are separated; the three second terminal blocks I are respectively conductively connected to the three third static contacts I, and the three second terminal blocks II are respectively conductively connected to the three third static contacts II; the three second terminal blocks I partially extend to one side of the second contactor housing, and the second terminal block II partially extends to the other side of the second contactor housing; the three second terminal blocks II correspond one-to-one with the three first terminal blocks II, and each second terminal block II is connected to the corresponding first terminal block II through a transition conductor, which is a soft link or a hard link; each transition conductor has a connection portion.

[0031] This structure allows the star-delta contactor module to be combined with a second contactor to form a star-delta starting switch. To connect the connections, simply electrically connect the second terminal block I of the second contactor to one end of the motor M winding, the connection portion to the three-phase power supply, and the first connection segment to the other end of the motor M winding. This star-delta starting switch can then be connected to the motor's starting circuit. When the second contactor and the first connection assembly of the star-delta contactor module are simultaneously connected, a star connection is formed. When the second contactor and the second connection assembly of the star-delta contactor module are simultaneously connected, a delta connection is formed. This star-delta starting switch offers a relatively high degree of integration, making wiring easier for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 shows a three-dimensional view of the star contactor module of Example 1 of the present application; Figure 2 An exploded view of the star contactor module of Example 1 of the present application is shown; Figure 3 A schematic structural diagram of an embodiment of the electromagnetic system in the star contactor module of the present application is shown; Figure 4 A structural diagram showing another embodiment of the electromagnetic system in the star contactor module of the present application is shown; Figure 5 A schematic structural diagram of an embodiment of a first moving contact and a short-circuit member in a star contactor module of the present application is shown; Figure 6 A structural diagram showing another embodiment of the first moving contact and the short-circuit member in the star contactor module of the present application is shown; Figure 7 A structural diagram showing another embodiment of the first moving contact and the short-circuit member in the star contactor module of the present application is shown; Figure 8 A structural diagram showing another embodiment of the first moving contact and the short-circuit member in the star contactor module of the present application is shown; Figure 9 A schematic structural diagram showing an embodiment of the first static conductive structure in the star contactor module of the present application is shown; Figure 10 A structural schematic diagram showing another embodiment of the first static conductive structure in the star contactor module of the present application is shown; Figure 11 A structural schematic diagram showing another embodiment of the first static conductive structure in the star contactor module of the present application is shown; Figure 12 A structural schematic diagram showing another embodiment of the first static conductive structure in the star contactor module of the present application is shown; Figure 13 shows a cross-sectional view of a star contactor module in the present application; Figure 14 A three-dimensional diagram of a star-delta contactor module according to Example 1 of the present application is shown; Figure 15 A schematic diagram of the internal structure of the star-delta contactor module of Example 1 of the present application is shown; Figure 16 It shows the position relationship diagram of the interlocking parts when the first contact assembly of Example 1 of the present application is connected; Figure 17 It shows the position relationship diagram of the interlocking parts when the second contact assembly of Example 1 of the present application is connected; Figure 18 A perspective view of a star-angle start switch according to Example 1 of the present application is shown; Figure 19 A schematic diagram showing the internal structure of the star-delta starting switch of Example 1 of the present application is shown; Figure 20 A schematic diagram of the star-delta starting switch, three-phase power supply, and motor wiring of Example 1 of the present application is shown. DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present application. Examples of these embodiments are illustrated in the accompanying drawings, where identical or similar reference numerals throughout represent identical or similar elements or elements having identical or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative and intended only to explain the present application and are not to be construed as limiting the present application.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present application.

[0036] Furthermore, the terms "primary" and "secondary" 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 specified as "primary" or "secondary" may explicitly or implicitly include one or more of such features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified or limited, "above" or "below" a main feature may mean that the main feature and the second feature are in direct contact, or that the main feature and the second feature are in indirect contact through an intermediary. Furthermore, "above," "above," and "above" a main feature may mean that the main feature is directly above or diagonally above the second feature, or simply indicate that the main feature is higher in level than the second feature. "below," "below," and "below" a main feature may mean that the main feature is directly below or diagonally below the second feature, or simply indicate that the main feature is higher in level than the second feature and has a lower electrical connection to the three-phase power supply than the second feature. Example

[0039] like Figures 1-13 As shown, an embodiment of the present application provides a star contactor module 100 , which includes a star module housing 101 , a first electromagnetic system 102 , a first contact support 103 and a first contact assembly 104 .

[0040] The star module housing 101 primarily houses components such as the first electromagnetic system 102, the first contact support 103, and the first contact assembly 104. In this embodiment, the star module housing 101 comprises a star module upper cover 101a and a star module lower base 101b. The first electromagnetic system 102 and the first contact support 103 are housed within the space formed by the star module upper cover 101a and the star module lower base 101b. Depending on the specific configuration, the first contact assembly 104 can be partially positioned beyond the star module housing 101 or completely contained within the star module housing 101. The specific structure of the first contact assembly 104 will be described in detail below. The star module upper cover 101a and the star module lower base 101b can be fastened with screws to ensure the stability of the entire star module housing 101. Alternatively, a snap-fit ​​connection can be used. In addition to this upper and lower housing configuration formed by the upper cover and lower base, a left and right housing configuration can also be used. In addition to the two-component structure of the star module upper cover 101a and the star module lower base 101b, a single component or three-component structure can also be used. Regardless of the specific structure of the star module housing 101, as long as it can form a stable space for mounting components such as the first electromagnetic system 102, the first contact support 103, and the first contact assembly 104, it will be sufficient.

[0041] The first contact support 103 is longitudinally slidably disposed inside the star module housing 101 . The function of the first contact support 103 is to connect and disconnect the first contact assembly 104 .

[0042] The first electromagnetic system 102 essentially utilizes the principle of electromagnets, and includes a first coil 102a, a first skeleton 102b, a first armature 102c, and a first magnetic yoke 102d. The first coil 102a is wound around the first skeleton 102b, the first coil 102a surrounds the first magnetic yoke 102d, and the first armature 102c is configured for sliding. When the first coil 102a is energized, the first coil 102a generates a magnetic field force, and the first armature 102c slides under the action of the magnetic field force. At this time, since the first contact support 103 and the first armature 102c are connected, the two will move synchronously. The first electromagnetic system 102 in this application can adopt the electromagnet solution of a traditional contactor, such as Figure 4 As shown, other electromagnet solutions are also included, such as Figure 3 shown.

[0043] The first contact assembly includes three first moving contacts 104a and three sets of first static conductive structures. Here, the three first moving contacts 104a are short-circuited by a shorting member, meaning that the three first moving contacts 104a remain electrically connected in the circuit. The first moving contacts 104a are mounted on the first contact support 103 and can be driven by movement of the first contact support 103.

[0044] Here, according to the different structures of the short-circuit parts, they are divided into those connected together by soft connection, those connected together by hard connection, or those connected together by a combination of soft connection and hard connection. The soft connection method is relatively simple, such as Figure 5 As shown, a soft connection (such as a soft copper wire 105, of course, the soft connection here is not limited to copper) is welded on different first moving contacts 104a to connect the three first moving contacts 104a together in the circuit. There are relatively many ways to use hard connection, such as Figure 6 As shown, the first method is to use a conductive bar 105b formed independently of the three first moving contacts 104a, and then fix the conductive bar 105b to the first moving contacts 104a by screws, rivets, welding, etc., so that the three first moving contacts 104a are connected together in the circuit. Figure 7 As shown, the second way is that the conductive bar 105b is integrally formed with the first moving contact 104a, that is, the three first moving contacts 104a are an integral part, and the three first moving contacts 104a are connected together in the circuit. Another way is to use a combination of soft connection and hard connection, such as Figure 8 As shown, that is, two of the first moving contacts 104a are connected together by a hard connection, and the other first moving contact 104a is connected to the two first moving contacts 104a by a soft connection (including being connected to both of the first moving contacts 104a by a soft connection, and also including being connected to one of the two first moving contacts 104a by a soft connection).

[0045] The first static conductive structure includes a first wiring segment 106a, a contact segment 106b, and a second wiring segment 106c. These segments are always electrically connected. These segments are used to connect to external wires or devices (external to the star contactor module 100). In this embodiment, the first wiring segment 106a is positioned outside the star module housing 101, while the second wiring segment 106c resides within the housing. Of course, the first wiring segment 106a and the second wiring segment 106c here can also be set up in other ways. For example, the first wiring segment 106a and the second wiring segment 106c are both located inside the star module housing 101 (only a hole needs to be opened on the housing to connect the external wires or terminal blocks of the device); or the first wiring segment 106a and the second wiring segment 106c are both located outside the star module housing 101; or the second wiring segment 106c is located outside the star module housing 101, and the first wiring segment 106a is located inside the star module housing 101; no matter which method is used, as long as the wiring can be achieved.

[0046] The three contact segments 106b correspond one-to-one to the three first moving contacts 104a, and are located within the movement trajectory of the corresponding first moving contacts 104a. When the first contact support 103 slides, the first moving contact 104a and the contact segments 106b can be in contact and separation (because the sliding directions of the first contact support 103 are different, the contact and separation effects can be produced). When the contact segment 106b is in contact with the first moving contact 104a, the first contact assembly 104 is in the connected state. When the contact segment 106b is separated from the first moving contact 104a, the first contact assembly 104 is in the disconnected state.

[0047] According to the specific structure of the first static conductive structure, there are several situations as follows: Case 1 is also the simplest solution, such as Figure 9 As shown, the first wiring segment 106a, the contact segment 106b and the second wiring segment 106c are an integrally formed conductive bar, so that the three are naturally always connected in the circuit.

[0048] In the second scenario, the first wiring segment 106a, the contact segment 106b, and the second wiring segment 106c are all formed separately. Then, the first wiring segment 106a and the contact segment 106b are fixed or welded or softly connected using a first fastener (screw or rivet), and the contact segment 106b and the second wiring segment 106c are fixed or welded or softly connected using a first fastener (screw or rivet). This can also ensure that the three segments always maintain a connected state in the circuit. In order to make it more vivid, the soft connection method is used as shown in FIG. Figure 10 As shown, the welding method is as follows Figure 11 As shown, the first fastener (screw or rivet) is omitted in the figure.

[0049] Case 3 is similar to Case 2, except that the connection positions are changed. The first wiring segment 106a is connected to the second wiring segment 106c, and the contact segment 106b is connected to the first wiring segment 106a. The connection method refers to Case 2, and the relevant drawings are not shown here.

[0050] Case 4 is similar to Case 2, except that the connection positions are changed. The first wiring segment 106a is connected to the second wiring segment 106c, and the contact segment 106b is connected to the second wiring segment 106c. The connection method refers to Case 2, and the relevant drawings are not shown here.

[0051] Scenario 5: In this manner, two of the first wiring segment 106a, the contact segment 106b, and the second wiring segment 106c are integrally formed, and the other one is fixed to the two integrally formed structures by a first fastener, welded, or softly connected, so that the three are always connected in the circuit. Figure 12 As shown, the first wiring segment 106a and the contact segment 106b are integrally formed, and the second wiring segment 106c is connected to them by a soft connection. Relevant drawings of other examples are omitted.

[0052] The above describes the connection of the first wiring assembly. There are various structures for disconnecting the first wiring assembly. The following describes the disconnection of the first wiring assembly through two sets of solutions.

[0053] like Figure 4As shown, in this embodiment, the reset structure is a return spring 107, which is a compression spring. Here, the return spring 107 abuts between the first armature 102c and the first frame 102b. Thus, when the first electromagnetic system 102 is energized (when the first coil 102a is energized), the first armature 102c and the first contact support 103 move to connect the first contact assembly 104, and the return spring 107 is compressed. When the first electromagnetic system 102 is de-energized (when the first coil 102a is energized), the magnetic field force disappears, and the first armature 102c and the first contact support 103, under the action of the return spring 107, move to disconnect the first contact assembly 104. Of course, the return spring 107 is not limited to a compression spring; other forms such as a tension spring, a leaf spring, a disc spring, and a torsion spring may also be used. Similarly, the abutment position of the return spring 107 can also be that one end abuts on the first contact support 103 and the other end abuts on a static component such as the frame, the inner wall of the star module housing 101, the yoke 102d, etc. Figure 3 As shown, one end of the return spring 107 abuts against the first contact support 103, and the other end abuts against the star module housing 101 (not shown in the figure).

[0054] The star contactor module 100 is introduced above. The following describes a solution for using the star contactor module 100 in combination with a common contactor. This combination can form a switching device similar to a closed star contactor.

[0055] like Figure 14-17 As shown, a star-delta contactor module includes a first contactor 200 and the star contactor module 100 mentioned above.

[0056] The first contactor 200 includes a first contactor housing 201, a second electromagnetic system 202 (to be distinguished from the first electromagnetic system 102, not to indicate that the contactor has two electromagnetic systems), a second contact assembly (to be distinguished from the first contact assembly 104, not to indicate that the contactor has two groups of contact assemblies), and a second contact support 203 (to be distinguished from the first contact support 103, not to indicate that the contactor has two contact supports).

[0057] The first contactor housing 201 is used to accommodate components such as the second electromagnetic system 202 and the second contact assembly.

[0058] The second electromagnetic system 202 is the electromagnetic system of a common contactor in the art, including an armature (a second armature), a coil, a yoke, a frame, a return spring, etc., which will not be described in detail here.

[0059] The second contact support 203 is connected to the armature of the second electromagnetic system 202, and the two are in a synchronous motion relationship.

[0060] The second contact assembly, also common in contactors in the art, includes three second movable contacts 204a, three second stationary contacts I 204b, three second stationary contacts II 204c, three first terminal blocks I 204d, and three first terminal blocks II 204e. Each second movable contact 204a corresponds to a second stationary contact I 204b and a second stationary contact II 204c. The second movable contacts 204a are mounted on the second contact support 203. As the second contact support 203 moves, the second movable contacts 204a simultaneously contact and separate from the second stationary contacts I 204b and II 204c, thereby placing the corresponding second contact assembly in either the connected or disconnected state. The three first terminal blocks I 204d are electrically conductively connected to the three second stationary contacts I 204b, respectively. This electrically conductive connection means that the first terminal blocks I 204d and the second stationary contacts I 204b can be separate components connected together via fasteners, welding, or a single component. The three first terminal blocks II 204e are electrically conductively connected to the three second stationary contacts II 204c, respectively. The electrically conductive connection here is the same as described above.

[0061] The three first wiring boards I 204d and the three second wiring segments 106c are in a one-to-one correspondence, and the two are connected by a second fastener, which is a screw. Of course, other than this, flexible connections or welding can also be used.

[0062] To make the star-delta contactor module more compact, the star module housing 101 can be connected to the first contactor housing 201. Specifically, the first terminal block I 204d partially extends to the first side surface of the first contactor housing 201, and the star module housing 101 is disposed on the first side surface of the first contactor housing 201. The star module housing 101 and the first contactor housing 201 are connected by bolts. Of course, in addition to using bolts 205 here, a snap-on fastening method can also be used for fastening.

[0063] To achieve interlocking of the above structure, an interlocking member 206 disposed within the star module housing 101 is also rotated. The interlocking member 206 here primarily functions by associating with the first contact support 103 and the second contact support 203 to achieve mechanical interlocking between the first contact assembly 104 and the second contact assembly. In other words, when the first contact assembly 104 is in the connected state, the second contact assembly cannot be connected and remains in the disconnected state. Similarly, when the second contact assembly is in the connected state, the first contact assembly 104 cannot be connected and remains in the disconnected state.

[0064] There are many specific implementations. The following example illustrates a preferred structure. Two interlocking members 206 are pivotally connected to the star module housing 101 via a pin. The interlocking members 206 include a first locking portion 206a and a second locking portion 206b offset from the rotational center of the interlocking member 206. The second locking portion 206b corresponds to the second contact support 203 (the second locking portion 206b passes through a through-hole 2031 in the first contactor housing 201 and corresponds to the second contact support 203). The first locking portion 206a corresponds to the first contact support 103. When the first electromagnetic system 102 is energized, the first contact support 103 slides downward. Under the action of the first contact support 103, the first locking portion 206a moves, causing the second locking portion 206b to deflect to a position that restricts the movement of the second contact support 203. Since the first electromagnetic system 102 is still energized, the second contact support 203 cannot slide downward due to the restraint of the second locking portion 206b, thus preventing the second contact assembly from being connected. Similarly, when the second electromagnetic system 202 is energized, the second contact support 203 slides downward. Under the action of the second contact support 203, the second locking portion 206b moves, causing the first locking portion 206a to deflect to a position that restricts the movement of the first contact support 103. Since the second electromagnetic system 202 is still energized, the first contact support 103 cannot slide downward under the restriction of the first locking portion 206a, that is, the first contact assembly 104 cannot be connected. In this way, mechanical interlocking is achieved.

[0065] Of course, although the first locking portion 206a in the above example has a direct interaction relationship with the first contact support 103, it is not limited to a direct interaction relationship and should also include an indirect interaction relationship, which facilitates the use of an intermediate slider 207 between the first locking portion 206a and the first contact support 103 (refer to the relationship between the second locking portion 206b and the second contact support 203) to achieve mechanical interlocking using the intermediate slider 207. Similarly, the second locking portion 206b should not be limited to being understood as having a direct interaction relationship with the second contact support 203, but should also include the use of intermediate components to achieve mechanical interlocking, such as Figure 16-17 As shown, an intermediate slider 207 is provided below the second contact support 203. When the second electromagnetic system 202 is energized, the slider can be pushed by the second contact support 203, thereby driving the second locking portion 206b to move. When the first electromagnetic system 102 is energized, the second locking portion 206b can abut against the intermediate slider 207, thereby limiting the movement of the second contact support 203.

[0066] Of course, although the above example uses two interlocking members 206, a single interlocking member 206 or multiple interlocking members 206 may also be used depending on the size of the product. Furthermore, since the first armature 102c and the first contact support 103 move synchronously, and the second armature and the second contact support 203 also move synchronously, the interlocking member 206 may also form a mechanical interlock with the first armature 102c and the second armature in a manner corresponding to each other. For a specific solution, please refer to the above description of the first contact support 103 and the second contact support 203, and will not be repeated here.

[0067] Here, to ensure that the interlocking element 206 has a reset effect, an interlocking element reset structure 2061 is provided between the interlocking element 206 and the star module housing 101. The interlocking element reset structure 2061 is a spring sheet, one end of which abuts against a notch on the interlocking element 206 and the other end abuts against the star module housing 101. When the first electromagnetic system 102 is energized, the first contact support 103 slides downward to rotate the interlocking element 206, causing the interlocking element reset structure 2061 to deform. When the first electromagnetic system 102 is de-energized, the interlocking element reset structure 2061 resets the interlocking element 206. The interlocking element reset structure 2061 is not limited to a spring sheet, but can also be a compression spring, a torsion spring, a tension spring, and the like.

[0068] Such an interlocking member 206 may also be provided in the first contactor housing 201 . Of course, this will make a greater modification to the first contactor 200 , but the interlocking effect can also be achieved.

[0069] The above introduces the star-delta contactor module. The following introduces the star-delta starting switch.

[0070] like Figure 18-20 As shown, a star-delta starting switch includes a second contactor 300 and the above-mentioned star-delta contactor module.

[0071] The second contactor 300 includes a second contactor housing 301, a third electromagnetic system 302 (here to distinguish it from the first and second electromagnetic systems 202, not specifically indicating that the contactor has three electromagnetic systems), a third contact assembly (here to distinguish it from the first and second contact assemblies, not specifically indicating that the contactor has three groups of contact assemblies), and a third contact support 303 (here to distinguish it from the first and second contact supports 203, not specifically indicating that the contactor has three contact supports).

[0072] The second contactor housing 301 is used to accommodate components such as the third electromagnetic system 302 and the third contact assembly.

[0073] The third electromagnetic system 302 is the electromagnetic system of a common contactor in the art, including an armature, a coil, a yoke 102d, a frame, a return spring, etc., which will not be described in detail here.

[0074] The third contact support 303 is connected to the armature of the third electromagnetic system 302, and the two are in a synchronous motion relationship.

[0075] The third contact assembly, also a common contact assembly in contactors in this field, includes three third movable contacts 304a, three third stationary contacts I 304b, three third stationary contacts II 304c, three second terminal blocks I 304d, and three second terminal blocks II 304e. Each third movable contact 304a corresponds to a third stationary contact I 304b and a third stationary contact II 304c. The third movable contacts 304a are mounted on a third contact support 303. As the third contact support 303 moves, the third movable contacts 304a simultaneously contact and separate from the third stationary contacts I 304b and II 304c, thereby placing the corresponding third contact assembly in either a connected or disconnected state. The three second terminal blocks I 304d are electrically conductively connected to the three third stationary contacts I 304b, respectively. This electrically conductive connection means that the second terminal blocks I 304d and the third stationary contacts I 304b can be separate components connected together via fasteners, welding, or a single component. The three second terminal blocks II 304e are electrically conductively connected to the three third stationary contacts II 304c, respectively. The electrically conductive connection here is the same as described above.

[0076] Three second terminal blocks I 304d are exposed from one side of the second contactor housing 301, while three second terminal blocks II 304e are exposed from the other side of the second contactor housing 301. The three second terminal blocks II 304e correspond one-to-one with the three first terminal blocks II 204e. Each second terminal block II 304e is connected to the corresponding first terminal block II 204e via a transition conductor 305. In this embodiment, the transition conductor 305 is a hard connection, that is, a conductive bar. Each transition conductor 305 has a connection portion 305a. Alternatively, the transition conductor 305 can be a soft connection.

[0077] This structure can be connected to the motor windings and a three-phase power supply to form a star-delta starting circuit. Specifically, the three connection sections 305a are connected to the three-phase power supply, the three second terminal blocks I 304d are connected to one end of the motor windings, and the three first connection sections 106a are connected to the other ends of the three motor windings. When the first contact assembly 104 and the third contact assembly are both connected, a star connection is formed. When the second contact assembly and the third contact assembly are both connected, a delta connection is formed.

[0078] The first contactor 200 and the second contactor 300 shown in the drawings in the above exemplary embodiment are contactors with relatively large current parameter specifications. In addition, this structure can also use contactors with smaller current parameter specifications.

[0079] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and integrate different embodiments or examples, and features of different embodiments or examples, described in this specification, unless otherwise inconsistent.

[0080] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A star contactor module, characterized in that: The invention comprises a star module housing, a first electromagnetic system, a first contact support, a first contact assembly and a reset structure; the first contact assembly comprises three first moving contacts and three groups of first static conductive structures, the first moving contact is arranged on the first contact support and moves with the first contact support, and the three first moving contacts are short-circuited by a short-circuit member; each first static conductive structure comprises a first wiring segment, a contact segment and a second wiring segment, and the first wiring segment, the contact segment and the second wiring segment in the same first static conductive structure always maintain a connected state in the circuit; the first electromagnetic system comprises a first armature arranged for sliding, the first contact support and The first armature is set for synchronous movement, and the three contact segments are respectively located below the three first moving contacts. The connection and disconnection of the first contact assembly are realized by the sliding of the first contact support; when the first electromagnetic system is energized, the first armature slides under the action of the magnetic field force of the first electromagnetic system, so that the first moving contact contacts the contact segment, thereby realizing the connection of the first contact assembly; the reset structure is a reset spring, one end of the reset spring is against the first contact support or the first armature, and the reset spring is used to drive the first contact support to reset after the first electromagnetic system is powered off, so that the first moving contact is separated from the contact segment, thereby realizing the disconnection of the first contact assembly.

2. A star contactor module according to claim 1, characterized in that: The short-circuit is a soft link, and the three first moving contacts are connected together through the soft link; Alternatively, the short-circuit member is a hard link, and the three first moving contacts are connected together by the hard link; Alternatively, the short-circuit is a combination of a soft link and a hard link, wherein the two first moving contacts are connected via a hard link, and another first moving contact is connected to one or both of the two first moving contacts via a soft link.

3. A star contactor module according to claim 1, characterized in that: The first wiring segment, the contact segment, and the second wiring segment are formed as an integral conductive bar, so that the three segments are always connected in the circuit; Alternatively, among the first wiring segment, the contact segment, and the second wiring segment, the first wiring segment and the contact segment are fixed by a first fastener, welded, or connected by a flexible connection, and the contact segment and the second wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, so that the three segments always maintain a connected state in the circuit; Alternatively, among the first wiring segment, the contact segment, and the second wiring segment, the first wiring segment and the second wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, and the contact segment and the first wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, so that the three segments always maintain a connected state in the circuit; Alternatively, among the first wiring segment, the contact segment, and the second wiring segment, the first wiring segment and the second wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, and the contact segment and the second wiring segment are fixed by a first fastener, welded, or connected by a flexible connection, so that the three segments always maintain a connected state in the circuit; Alternatively, two of the first wiring segment, the contact segment, and the second wiring segment are integrally formed, and the other one is fixed to the two integrally formed structures by a first fastener, welded, or softly connected, so that the three always remain connected in the circuit.

4. A star-delta contactor module, characterized in that: It includes a first contactor and a star contactor module as described in any one of claims 1 to 3; the first contactor includes a second contact assembly, the second contact assembly includes three second moving contacts, three second static contacts I, three second static contacts II, three first terminal blocks I and three first terminal blocks II, and the second contact assembly has an on state and an off state; when in the on state, the second moving contact is in contact with the corresponding second static contact I and second static contact II; when in the off state, the second moving contact is separated from the corresponding second static contact I and second static contact II; the three first terminal blocks I are respectively conductively connected to the three second static contacts I, the three first terminal blocks II are respectively conductively connected to the three second static contacts II, and the three second wiring segments are respectively arranged in a one-to-one correspondence with the three first terminal blocks I and are fastened or softly connected or fixed by welding through a second fastener.

5. A star-delta contactor module according to claim 4, characterized in that: The first contactor further includes a first contactor housing. The first terminal block I portion extends to a first side surface of the first contactor housing. The star module housing is disposed on the first side surface of the first contactor housing and is connected to the first contactor housing.

6. A star-delta contactor module according to claim 5, characterized in that: It also includes an interlocking piece rotatably arranged in the first contactor housing or rotatably arranged in the star module housing; the first contact component and the second contact component are mechanically interlocked through the interlocking piece, the first contact support, and the second contact support, or the first contact component and the second contact component are mechanically interlocked through the interlocking piece, the first armature, and the second armature; the mechanical interlock is that when the first contact component is in the connected state, the second contact component cannot be connected and is in the disconnected state, and when the second contact component is in the connected state, the first contact component cannot be connected and is in the disconnected state.

7. A star-delta contactor module according to claim 6, characterized in that: The interlocking member has a first locking portion and a second locking portion that are offset from the rotation center of the interlocking member; the first locking portion corresponds to the first contact support or the first armature, and the second locking portion corresponds to the second contact support or the second armature; when the first contact assembly is in the connected state, the interlocking member rotates under the action of the first contact support or the first armature, so that the second locking portion rotates to a position that limits the movement of the second contact support or the second armature, thereby preventing the second contact assembly from being connected; when the second contact assembly is in the connected state, the interlocking member, under the action of the second contact support or the second armature, causes the first locking portion to rotate to a position that limits the movement of the first contact support or the first armature, thereby preventing the first contact assembly from being connected.

8. The star-delta contactor module according to claim 6, characterized in that: It also includes an intermediate slider, and the first contact component and the second contact component are mechanically interlocked through the interlocking part, the first contact support, and the second contact support; the intermediate slider is slidingly arranged and is arranged between the interlocking part and the first contact support and / or the second contact support, and the interaction relationship between the interlocking part and the first contact support and / or the second contact support is completed through the intermediate slider.

9. The star-delta contactor module according to claim 6, characterized in that: It also includes an interlocking piece reset structure, which is arranged next to the interlocking piece. One end of the interlocking piece reset structure abuts against the interlocking piece, and the other end abuts against the first contactor housing or the star module housing.

10. A star-delta starting switch, characterized by: It includes a second contactor and a star-delta contactor module according to any one of claims 4 to 9; The second contactor includes a second contactor housing and a third contact assembly, the third contact assembly including three third moving contacts, three third static contacts I, three third static contacts II, three second terminal blocks I, and three second terminal blocks II, the third contact assembly having an on state and an off state; in the on state, the third moving contact is in contact with the corresponding third static contact I and third static contact II; in the off state, the third moving contact is separated from the corresponding third static contact I and third static contact II; the three second terminal blocks I are respectively conductively connected to the three third static contacts I, and the three second terminal blocks II are respectively conductively connected to the three third static contacts II; The three second terminal blocks I partially extend to one side surface of the second contactor housing, and the second terminal block II partially extends to the other side surface of the second contactor housing; The three second terminal blocks II correspond to the three first terminal blocks II one by one. Each second terminal block II is connected to the corresponding first terminal block II via a transition conductor, which is a soft connection or a hard connection. Each transition conductor has a connection portion.

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