AC motor star-delta operation conversion controller
By designing a streamlined AC motor star corner running conversion controller, the number of AC contacts and control circuits is reduced, the problem of complex control, high cost, and high failure rate in the existing technology, and a higher failure rate, realized higher Reliability and security have reduced construction costs.
Patent Information
- Application Number
- CN202420261504.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-02-02
AI Technical Summary
In the existing AC motor operation control system, the star-angle operation conversion device requires three AC contactors and their control circuits, resulting in complex control cabinets, high cost, high failure rate, and complex laying of power cables.
Design a more streamlined AC motor star angle running conversion controller, using shell installation AC contactor to reduce the number of AC contactors and control circuits. Two AC contactors form a star angle converter.
By reducing the number of AC contactors and control circuits, the volume and failure rate of the control cabinet is reduced, the connection of the control circuit and the laying of power cables are simplified, the reliability and security of operation is improved, and the construction cost is saved.
Smart Images
Figure CN222423398U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motor operation control, and in particular relates to a star-angle operation conversion controller for an AC motor. Background Art
[0002] At present, the AC motor operation control and star-angle operation conversion devices are concentrated in a main control cabinet. The star-angle operation conversion in the cabinet uses three AC contactors and their control circuits. Two power cables are output to the site to connect with the AC motor. The structure and cost of the control system need to be streamlined and optimized.
[0003] Based on this, the inventor designed and proposed a star-angle operation conversion controller for an AC motor. Utility Model Content
[0004] In order to overcome the above technical problems, the utility model provides an AC motor star-angle operation conversion controller with a simpler structure and lower cost.
[0005] The utility model adopts the following technical solutions:
[0006] A star-angle operation conversion controller for an AC motor comprises a housing and an AC contactor. The housing is mounted on a junction box of the motor. The AC contactor is arranged in the housing and connected to a motor circuit.
[0007] Preferably, an AC contactor 1 with three normally open and three normally closed is arranged in the housing, the three normally open points of the AC contactor 1 are operated in delta connection, and the three normally closed points of the AC contactor 1 are operated in star connection.
[0008] Preferably, two AC contactors are arranged in the housing, namely AC contactor 2 and AC contactor 3, and the AC contactor 2 and AC contactor 3 form a star-angle converter.
[0009] Preferably, the currents that can pass through all normally open points and normally closed points of the AC contactor 1 are the same.
[0010] Preferably, the three normally closed and three normally open contacts of the AC contactor 1 are provided with arc extinguishing covers.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The AC motor using this AC motor star-delta operation conversion controller can use two fewer AC contactors and their control circuits in the control cabinet, and one less power cable than the current AC motor running in star-delta conversion. It reduces the volume of the control cabinet, reduces the failure rate, simplifies the connection of the control circuit and the laying of the power cable, enhances the reliability and safety of operation, improves the installation efficiency, and saves construction costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is an overall schematic diagram of the utility model;
[0014] Figure 2 This is a schematic diagram of a star-angle operation conversion controller for an AC motor according to Embodiment 1;
[0015] Figure 3 This is a schematic diagram of the installation of the star-angle operation conversion controller of the AC motor in the first embodiment;
[0016] Figure 4 This is a schematic diagram of a star-angle operation conversion controller for an AC motor according to Embodiment 2;
[0017] Figure 5 This is a schematic diagram of the installation of the star-angle operation conversion controller of the AC motor in the second embodiment;
[0018] Figure 6 It is a physical diagram of the present utility model.
[0019] Description of reference numerals:
[0020] 1 Shell; 2 Junction box; KM1 AC contactor one; KM2 AC contactor two; KM3 AC contactor three; KM4 control cabinet AC contactor. DETAILED DESCRIPTION
[0021] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the embodiments are conventional methods in the art unless otherwise specified. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.
[0022] Embodiment 1
[0023] See also Figures 1 to 3 A star-delta operation conversion controller for an AC motor comprises a housing 1 and an AC contactor. The housing 1 is mounted on a junction box 2 of the motor. The AC contactor is connected to the motor circuit. A three-normally-open and three-normally-closed AC contactor KM1 is arranged in the housing. The three normally-open points of the AC contactor KM1 are operated in delta connection, and the three normally-closed points are operated in star connection. The currents that can pass through all the normally-open points and the normally-closed points of the AC contactor KM1 are the same. The three normally-closed and three normally-open points of the AC contactor KM1 are all provided with arc extinguishing covers.
[0024] An AC motor star-angle operation conversion controller, when used:
[0025] according to Figure 3Line connection, start the control cabinet AC contactor KM4 and the AC contactor KM1 in the star-delta converter, the normally closed contacts of the AC contactor KM1 are connected into a star circuit, the motor realizes star starting operation, 5-8 seconds later the normally open point is energized, the AC motor winding and the normally open contacts of the star-delta converter KM1 (becomes the normally closed point) are connected into a delta circuit, realizing delta connection operation.
[0026] Embodiment 2
[0027] See also Figure 1 , 4 5. A star-delta operation conversion controller for an AC motor comprises a housing 1 and an AC contactor. The housing is mounted on a junction box 2 of the motor. Two AC contactors are arranged in the housing 1, namely, AC contactor 2 KM2 and AC contactor 3 KM3. AC contactor 2 KM2 and AC contactor 3 KM3 form a star-delta converter.
[0028] according to Figure 5 Line connection, first start the control cabinet AC contactor KM4, AC contactor three KM3, the AC motor runs in star shape, 7 seconds later AC contactor three KM3 is disconnected, AC contactor two KM2 is energized, and the AC motor switches to delta shape operation.
[0029] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the above embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. An AC motor star-angle operation conversion controller, characterized in that: include: A housing, wherein the housing is mounted on a junction box of the motor; An AC contactor is arranged in a housing and connected to a motor circuit.
2. The AC motor star-angle operation conversion controller according to claim 1, characterized in that: An AC contactor 1 with three normally open and three normally closed is arranged in the shell. The three normally open points of the AC contactor 1 are operated in delta connection, and the three normally closed points of the AC contactor 1 are operated in star connection.
3. The AC motor star-angle operation conversion controller according to claim 1, characterized in that: Two AC contactors are arranged in the shell, namely AC contactor 2 and AC contactor 3, and the AC contactor 2 and AC contactor 3 form a star-angle converter.
4. The AC motor star-angle operation conversion controller according to claim 2, characterized in that: The current that can pass through all the normally open points and normally closed points of the AC contactor 1 is the same.
5. The AC motor star-angle operation conversion controller according to claim 2, characterized in that: The three normally closed and three normally open contacts of the AC contactor 1 are both provided with arc extinguishing covers.