Variable speed elevator abnormal classification protection system
By real-time monitoring of the car traction motor output power and implementing graded protection in variable speed elevators, the problem of equipment failure when the load detection is abnormal is solved, ensuring the safe and reliable operation of the elevator.
CN116639565BActive Publication Date: 2026-06-09SHANGHAI MITSUBISHI ELEVATOR CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI MITSUBISHI ELEVATOR CO LTD
- Filing Date
- 2023-05-25
- Publication Date
- 2026-06-09
Smart Images
Figure CN116639565B_ABST
Abstract
The application discloses a variable-speed elevator abnormal grading protection system, in the variable-speed mode, when the speed control unit controls the car traction motor to make the car run at a uniform speed higher than the rated speed, the abnormality judging unit judges the abnormal state according to the signal from the power detecting unit and sends the abnormal state information to the speed control unit. According to the car traction motor output power detected by the power detecting unit, the abnormality judging unit can judge the abnormal degree of the elevator in real time and continuously, detects the elevator fault in time, and automatically and timely adjusts the moving speed of the elevator car according to the abnormal degree, so that the elevator variable-speed is realized, the motor and the inverter are prevented from causing the fault due to abnormal heating, and the safety of passengers is ensured even if the motor output power is abnormal when the elevator runs at the variable speed.
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