家电科技Issue(z1)：447-451,5.DOI:10.19784/j.cnki.issn1672-0172.2025.99.093
宽调速范围单相交流电机:90度移相检测技术应用
Wide-speed-range single-phase AC motor:Application of 90-degree phase shift detection technology
李玉 1周宏明 1刘文龙 1王慧峰1
作者信息
- 1. 广东美的制冷设备有限公司 广东佛山 528311
- 折叠
摘要
Abstract
A 90° phase-shifted quadrature detection method addresses zero-crossing detection limitations in single-phase AC motor thyristor speed control systems.Conventional zero-crossing triggering suffers from grid disturbance sensitivity in optocouplers,motor inductance-induced phase lag degrading power factor,and high costs of improved alternatives.The solution generates a precise 90° phase-shifted reference signal using DSP-based grid frequency tracking,replacing direct zero-crossing detection.This approach suppresses harmonic interference and compensates load current phase lag automatically.Experimental results demonstrate stable triggering accuracy during voltage fluctuations,with enhanced noise immunity and lower cost versus conventional methods.The reliable technique proves valuable for appliance motor control applications like AC fans.关键词
导通角/负载相位偏移/调速鲁棒性/电压相位Key words
Conduction angles/Load-induced phase offsets/Dynamics emphasized/Voltage phase分类
信息技术与安全科学引用本文复制引用
李玉,周宏明,刘文龙,王慧峰..宽调速范围单相交流电机:90度移相检测技术应用[J].家电科技,2025,(z1):447-451,5.
