Turn fault detection technique is of key importance for system safety, which can protect the machine and enable the appropriate mitigation strategies. In this article, an advanced turn fault detection method is investigated for an interior permanent magnet machine (IPM) using the ripple current induced by the inherent pulse width modulation (PWM) voltage harmonics. The resultant current harmonics under high-frequency voltage harmonics are analyzed for both healthy and turn fault conditions. The feasibility of the detection method is validated by both simulation studies and prototype tests. It is confirmed that the PWM ripple current-based diagnosis technique can be employed to detect the turn fault in IPM without introducing undesirable noises and vibrations, and it is capable to detect early turn fault.

中文翻译：

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基于PWM纹波电流的室内永磁电机匝间故障检测研究

转弯故障检测技术对于系统安全至关重要，它可以保护机器并启用适当的缓解策略。在本文中，使用由固有脉宽调制 (PWM) 电压谐波引起的纹波电流研究了一种用于内置永磁电机 (IPM) 的高级匝线故障检测方法。高频电压谐波下的合成电流谐波针对正常和匝间故障条件进行了分析。通过模拟研究和原型测试验证了检测方法的可行性。证实了基于 PWM 纹波电流的诊断技术可用于检测 IPM 中的匝间故障，而不会引入不良噪声和振动，并且能够检测早期匝间故障。