一种三相异步电动机提刷系统用短接开关装置
By designing a short-circuit switch device for the brush lifting system of a three-phase asynchronous motor, the automatic short-circuiting and disconnection of the rotor windings were realized, solving the problems of rapid carbon brush wear and unstable contact, improving the operating efficiency and reliability of the motor, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIANGTAN ELECTRIC MFG CORP LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-07-17
AI Technical Summary
In traditional three-phase wound-rotor asynchronous motors, the slip ring mechanism causes continuous friction between the carbon brushes and the slip rings after the motor starts. This leads to rapid wear of the carbon brushes, unstable contact resistance, increased energy loss, and reduced motor operating efficiency and reliability. Furthermore, the automatic brush lifting device cannot automatically short-circuit the rotor windings, affecting the motor failure rate and maintenance costs.
Design a short-circuit switch device for a three-phase asynchronous motor brush lifting system, including a support device, a cable connection device, an opening and closing action device, and a short-circuit device. Automatic short-circuiting and disconnection of the rotor winding is achieved through a reaction spring and a torque motor, ensuring that the carbon brush is only engaged during startup to avoid prolonged friction.
It improves the stability and reliability of the carbon brush slip ring mechanism, reduces motor failure rate and maintenance costs, simplifies the electrical control process, reduces contact resistance and power loss, and ensures stable motor operation.
Smart Images
Figure CN120433506B_ABST