Permanent magnet synchronous motors have the advantage of high power,but there are problems with low mechanical strength and irreversible demagnetization in elevator traction applications.Among them,demagnetization issues directly affect the safety of elevator operation,and even lead to elevator stalling and roof collision.In view of this,an online demagnetization detection method based on variable parameter SMO is proposed.Based on the structural characteristics of permanent magnet synchronous motors in elevator traction,the chattering problem in SMO applications is solved by improving the saturation function and variable switch gain.The results show that the new online demagnetization detection method has high detection accuracy and meet requirements of online detection of elevator permanent magnet traction machines.
关键词
电梯永磁曳引机/退磁检测/滑模算法/检测标准
Key words
elevator permanent magnet traction machine/demagnetization detection/sliding mode algorithm/testing standards
维普
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