Integrated star-delta contactor

Abstract

The utility model relates to the technical field of manufacturing and application of low-voltage electric appliance products, in particular to an integrated star-delta contactor, which is characterized in that an upper mounting position and a lower mounting position are arranged in a shell structure, two short-circuit bars and a contact system are positioned at the lower mounting position, the short-circuit bars are used for electrically connecting different contact systems, and the short-circuit bars are used for electrically connecting the different contact systems. A star-delta starting electrical loop is formed; in the nine contact systems, every three contact systems form a three-pole contactor, three contact systems on one side form a main contactor, three contact systems in the middle form an angle contactor, and three contact systems on the other side form a star contactor; the electromagnetic system is installed on the upper installation position and used for controlling the main contactor, the angle contactor and the star contactor to act. The integrated star-delta contactor has the advantages of compact structure, low use cost and stable performance.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical product manufacturing and application technology, and in particular to an integrated star-delta contactor. Background Technology

[0002] Currently, most star-delta starting circuits on the market consist of three individual contactors or one 1-to-2 contactor plus one individual contactor. In use, the wiring between the contactors is complex, resulting in high labor costs, significant material waste, and poor aesthetics. Utility Model Content

[0003] To solve the above problems, this utility model provides an integrated star-delta contactor, which has the advantages of compact structure, low operating cost, and stable performance.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An integrated star-delta contactor includes a housing structure, an electromagnetic system, a shorting bar, nine contact systems, and an external junction box. The housing structure includes an upper mounting position and a lower mounting position. There are two shorting bars, with the two shorting bars and contact systems located in the lower mounting position. The shorting bars are used for electrical connection between different contact systems to form a star-delta starting electrical circuit.

[0006] In the nine contact systems, every three contact systems constitute a three-pole contactor, with three contact systems on one side constituting a main contactor, three contact systems in the middle constituting an angle contactor, and three contact systems on the other side constituting a star contactor.

[0007] The electromagnetic system is installed in the upper mounting position and is used to control the operation of the main contactor, angle contactor and star contactor.

[0008] Preferably, the housing structure includes an upper housing, a middle housing, and a lower housing. The interior of the upper housing is the upper mounting position, the interior of the lower housing is the lower mounting position, and the middle housing is located between the upper housing and the lower housing, thus separating the lower mounting position and the upper mounting position.

[0009] The upper housing has a removable top cover that exposes the electromagnetic system when removed; the upper and middle housings are removable to expose the lower housing and the contact system.

[0010] Preferably, the lower housing has multiple foot structures for fixing the integrated star-delta contactor, the foot structures being located on the outer peripheral side of the lower housing.

[0011] Preferably, an electrical interlock is also installed on the middle housing. The electrical interlock is used to prevent the angle contactor and the star contactor from closing simultaneously. The electrical interlock includes a first normally closed contact and a second normally closed contact.

[0012] Preferably, the integrated star-delta contactor further includes an external junction box for powering the electromagnetic systems of the main contactor, delta contactor, and star contactor;

[0013] The external junction box provides external electromagnetic system wiring terminals and signal feedback terminals, which are used for electrical connection with an external controller to receive control signals and send feedback signals.

[0014] Preferably, the electromagnetic system includes three electromagnetic control units, and the wiring terminals of the electromagnetic system are electrically connected to the coils of the three electromagnetic control units respectively.

[0015] The coil of the first electromagnetic control unit is directly connected to the electromagnetic system terminals on both sides;

[0016] The coil of the second electromagnetic control unit is connected to the electromagnetic system terminal block on one side and to the second normally closed contact of the electrical interlock on the other side.

[0017] The coil of the third electromagnetic control unit is connected to the electromagnetic system terminal block on one side and to the first normally closed contact of the electrical interlock on the other side.

[0018] Preferably, the contact system in the integrated star-delta contactor includes three contactor inlet copper busbars and six contactor outlet copper busbars.

[0019] Preferably, the middle housing is also equipped with a mechanical interlock to prevent the angle contactor and the star contactor from closing simultaneously.

[0020] The beneficial effects of using this utility model are:

[0021] The integrated star-delta contactor proposed in this application integrates the contact modules of three contactors and their wiring into a single finished housing, reducing secondary manual labor costs. Furthermore, the overall size of the integrated contactor is significantly reduced compared to three individual contactors, decreasing the material costs of the contactor itself and the mounting plates or boxes required for installation. Attached Figure Description

[0022] Figure 1 This is an exploded view of the integrated star-delta contactor of this utility model.

[0023] Figure 2 for Figure 1 Top view of the lower shell.

[0024] Figure 3 This is an isometric view of the integrated star-delta contactor of this utility model.

[0025] Figure 4 This is an axial side view of the integrated star-delta contactor of this utility model from another perspective.

[0026] Figure 5 This is a top view schematic diagram of the integrated star-delta contactor of this utility model.

[0027] Figure 6 This is a schematic diagram of the internal structure of the integrated star-delta contactor of this utility model.

[0028] The reference numerals in the figures include:

[0029] 1-Top cover;

[0030] 2-Upper shell;

[0031] 3-Electromagnetic systems;

[0032] 4-Middle shell;

[0033] 5-Lower shell; 51-Foot structure;

[0034] 6-Short-connector array;

[0035] 7-Electrical interlock; 71-First normally closed contact; 72-Second normally closed contact;

[0036] 8 - Contact system; 81, 82, 83 - Contactor inlet copper busbars; 811, 812, 813, 814, 815, 816 - Contactor outlet copper busbars;

[0037] 9-External junction box; 91-Externally open electromagnetic system terminal block; 92-Signal feedback terminal block;

[0038] 10 - Mechanical interlock; 101, 102, 103 - Electromagnetic system coils. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this technical solution clearer, the following detailed description, in conjunction with specific embodiments, further illustrates this technical solution. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this technical solution.

[0040] To address the problem of complex wiring and installation of three separate contactors in existing star-delta starting circuits, this embodiment proposes an integrated star-delta contactor. This integrated star-delta contactor has the advantages of compact structure, low operating cost, and stable performance.

[0041] Specifically, such as Figure 1As shown, the main components of the integrated star-delta contactor in this embodiment include a housing structure, comprising an upper housing 2, a middle housing 4, and a lower housing 5. The interior of the upper housing 2 is the upper mounting area, which includes three independent mounting positions, each capable of housing a separate electromagnetic system 3. The top of the upper housing 2 is open, and a cover 1 is installed at this open section, serving as both a cover and an exterior component. Another function of the cover 1 is to allow direct observation and contact with the independent electromagnetic system 3 through the open top of the upper housing 2, facilitating maintenance of the electromagnetic system 3 during subsequent use. Furthermore, the upper housing 2 and the middle housing 4 can be completely removed, directly exposing the lower housing 5 and the contact system 8, facilitating maintenance and replacement of the contact system 8.

[0042] A shorting bar 6 and a contact system 8 are installed at the lower housing 5. Both the contact system 8 and the shorting bar 6 are installed in the lower part of the lower housing 5. The contact system 8 and the lower housing 5 surrounding the contact system 8 are roughly rectangular in shape. The shorting bar 6 is located on both sides of the contact system 8 along its length. The shorting bar 6 is used to connect different contact systems 8 to form a star-delta starting electrical circuit. In this embodiment, there are nine contact systems 8. Among the nine contact systems 8, every three contact systems 8 constitute a three-pole contactor. The three contact systems 8 at the upper left constitute the main contactor, the three contact systems 8 in the middle constitute the corner contactor, and the three contact systems 8 at the lower right constitute the star contactor.

[0043] A transversely positioned, plate-like middle housing 4 is disposed between the upper housing 2 and the lower housing 5, separating the lower mounting position from the upper mounting position. This integrated star-delta contactor also features an electrical interlock 7 and a mechanical interlock 10 to prevent the angle contactor and the star contactor from closing simultaneously. Both the electrical interlock 7 and the mechanical interlock 10 are mounted on the middle housing 4 and located on one side of the electromagnetic system 3. The electrical interlock 7 includes a first normally closed contact 71 and a second normally closed contact 72. An external junction box 9 is disposed on the middle housing 4 and on the other side of the electromagnetic system 3. The external junction box 9 is used for power supply wiring of the electromagnetic system 3 for the main contactor, angle contactor, and star contactor.

[0044] like Figure 2 As shown, the lower housing 5 has multiple foot structures 51 for fixing the integrated star-delta contactor, and the foot structures 51 are located on the outer peripheral side of the lower housing 5. In this embodiment, there are four foot structures 51, which are located at the four outer peripheral corners of the lower housing 5, and the foot structures 51 are integrally injection molded with the lower housing 5. When installing this integrated star-delta contactor, only the four foot structures 51 of the lower housing 5 need to be fastened with screws, which saves time and effort compared to installing three contactors separately.

[0045] like Figure 3As shown, in this embodiment, three contact systems 8 on one side of the nine contact systems 8 are equipped with contactor inlet copper busbars 81, 82, and 83. The user only needs to connect the inlet copper busbars to the contactor inlet copper busbars 81, 82, and 83 of this integrated star-delta contactor to complete the inlet wiring. Figure 4 As shown, the other three contact systems 8 are equipped with contactor output copper busbars 811, 812, 813, 814, 815, and 816. The user only needs to connect these output copper busbars to the contactor output copper busbars 811, 812, 813, 814, 815, and 816 of this integrated star-delta contactor to complete the wiring. At this point, the main circuit wiring of this integrated star-delta contactor for use at the workstation is complete.

[0046] Combination Figure 5 As shown, the external junction box 9 has externally accessible electromagnetic system terminals 91 and signal feedback terminals 92. These terminals are used for electrical connection to an external controller to receive control signals and send feedback signals. For the electromagnetic system 3 wiring section, the external junction box 9 has externally accessible electromagnetic system terminals 91 and signal feedback terminals 92. These terminals are directly connected to the controller, completing the control system wiring. This completes all wiring for this integrated star-delta contactor.

[0047] like Figure 6 As shown, the electromagnetic system 3 includes three electromagnetic control units. The electromagnetic system terminals 91 are connected to electromagnetic system coils 101, 102, and 103 respectively. Different input points control the coils to engage, thus enabling the normal engagement function of this integrated star-delta contactor. Specifically, the first electromagnetic system coil 101 is directly connected to the electromagnetic system terminals 91 on both sides. The second electromagnetic system coil 102 is connected to the electromagnetic system terminals 91 on one side and to the second normally closed contact 72 of the electrical interlock 7 on the other side. The third electromagnetic system coil 103 is connected to the electromagnetic system terminals 91 on one side and to the first normally closed contact 71 of the electrical interlock 7 on the other side. This completes the electrical interlock function.

[0048] In summary, compared to the traditional star-delta starting circuit where three contactors are installed separately and then interconnected, the integrated star-delta contactor of this application integrates all components into the housing structure. The main electrical equipment has internal wiring, eliminating the need for secondary wiring between contactors during installation. Furthermore, the integrated structure offers a superior aesthetic appeal. The integrated star-delta contactor boasts a compact and rationally designed internal space, reducing the overall size of the contactor. With built-in mechanical and electrical interlock modules, it offers stable performance and improved reliability.

[0049] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0050] The above content is only a preferred embodiment of this utility model. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the ideas of this technical content. As long as these changes do not depart from the concept of this utility model, they all fall within the protection scope of this patent.

Claims

1. An integrated star-delta contactor, characterized in that: It includes a housing structure, an electromagnetic system, a shorting bar, nine contact systems, and an external junction box. The housing structure has an upper mounting position and a lower mounting position. There are two shorting bars, and the two shorting bars and contact systems are located in the lower mounting position. The shorting bars are used for electrical connection between different contact systems to form a star-delta starting electrical circuit. In the nine contact systems, every three contact systems constitute a three-pole contactor, with three contact systems on one side constituting a main contactor, three contact systems in the middle constituting an angle contactor, and three contact systems on the other side constituting a star contactor. The electromagnetic system is installed in the upper mounting position and is used to control the operation of the main contactor, angle contactor and star contactor.

2. The integrated star-delta contactor according to claim 1, characterized in that: The shell structure includes an upper shell, a middle shell, and a lower shell. The interior of the upper shell is the upper mounting position, the interior of the lower shell is the lower mounting position, and the middle shell is located between the upper shell and the lower shell, thus separating the lower mounting position and the upper mounting position.

3. The integrated star-delta contactor according to claim 2, characterized in that: The upper housing has a removable top cover that exposes the electromagnetic system when removed; the upper and middle housings are removable to expose the lower housing and the contact system.

4. The integrated star-delta contactor according to claim 2, characterized in that: The lower housing has multiple foot structures for fixing the integrated star-delta contactor, and the foot structures are located on the outer peripheral side of the lower housing.

5. The integrated star-delta contactor according to claim 2, characterized in that: An electrical interlock is also installed on the middle housing. The electrical interlock is used to prevent the angle contactor and the star contactor from closing simultaneously. The electrical interlock includes a first normally closed contact and a second normally closed contact.

6. The integrated star-delta contactor according to claim 5, characterized in that: The integrated star-delta contactor also includes an external junction box for powering the electromagnetic system of the main contactor, delta contactor, and star contactor. The external junction box provides external electromagnetic system wiring terminals and signal feedback terminals, which are used for electrical connection with an external controller to receive control signals and send feedback signals.

7. The integrated star-delta contactor according to claim 6, characterized in that: The electromagnetic system includes three electromagnetic control units, and the wiring terminals of the electromagnetic system are electrically connected to the coils of the three electromagnetic control units, respectively. The coil of the first electromagnetic control unit is directly connected to the electromagnetic system terminals on both sides; The coil of the second electromagnetic control unit is connected to the electromagnetic system terminal block on one side and to the second normally closed contact of the electrical interlock on the other side. The coil of the third electromagnetic control unit is connected to the electromagnetic system terminal block on one side and to the first normally closed contact of the electrical interlock on the other side.

8. The integrated star-delta contactor according to claim 1, characterized in that: The contact system of the integrated star-delta contactor includes three contactor inlet copper busbars and six contactor outlet copper busbars.

9. The integrated star-delta contactor according to claim 2, characterized in that: The middle housing is also equipped with a mechanical interlock to prevent the angle contactor and the star contactor from closing simultaneously.

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