永磁同步电机驱动系统开路故障检测方法

针对永磁同步电机(PMSM)驱动系统单相开路故障诊断问题,提出了一种基于dq电流特征提取的故障诊断方案。分析了传统的PMSM驱动系统单相开路故障诊断的原理和缺陷。设计了准确的故障模拟,简化了故障诊断算法开发过程,在此基础上设计了一种基于瞬时电流特性分析的单相开路故障诊断方案,其能够以最小的系统资源,在单个控制周期内快速地检出故障。利用PMSM驱动试验平台对新型故障诊断策略进行了测试。研究结果表明,新型故障诊断方案可以在PMSM较宽转速范围内精确地检测出单相开路故障。

Open-circuit Fault Detection Method for Permanent Magnet Synchronous Motor Driving System

Aiming at the single-phase open-circuit fault(SPOCF)diagnosis of permanent magnet synchronous motor(PMSM)driving system,a fault diagnosis scheme based on dq current feature extraction was proposed.The principle and defects of traditional SPOCF diagnosis of PMSM driving system were analyzed.The accurate fault simulation was designed and the development process of fault diagnosis algorithm was simplified.Based on this,a SPOCF detection scheme based on instantaneous current characteristic analysis was designed,which can detect faults quickly in a single control cycle with minimal system resources.The new fault diagnosis strategy was tested by the PMSM driving test platform.The research results show that the new fault diagnosis scheme can accurately detect SPOCF in the wide range of speeds of PMSM.