电子测量与仪器学报

蔡燕,文武平,别文轩,刘涛.开关磁阻电机功率变换器故障在线诊断方法研究[J].电子测量与仪器学报,2021,35(9):119-128

开关磁阻电机功率变换器故障在线诊断方法研究

Research on online fault diagnosis method of power converter forswitched reluctance motor

DOI：

英文关键词:fault diagnosis power converter switched reluctance motor

基金项目:国家自然科学基金（51777137）、天津市科技创新平台项目（16PTSYJC00080）、天津市自然科学基金（19JCQNJC03600）项目资助

作者	单位
蔡燕	1. 天津市电气装备智能控制重点实验室，2. 天津工业大学电气与电子工程学院
文武平	1. 天津市电气装备智能控制重点实验室，2. 天津工业大学电气与电子工程学院
别文轩	1. 天津市电气装备智能控制重点实验室，2. 天津工业大学电气与电子工程学院
刘涛	1. 天津市电气装备智能控制重点实验室，2. 天津工业大学电气与电子工程学院

Author	Institution
Cai Yan	1. Key Laboratory of Intelligent Control of Electrical Equipment,2. School of Electrical and Electronic Engineering, Tiangong University
Wen Wuping	1. Key Laboratory of Intelligent Control of Electrical Equipment,2. School of Electrical and Electronic Engineering, Tiangong University
Bie Wenxuan	1. Key Laboratory of Intelligent Control of Electrical Equipment,2. School of Electrical and Electronic Engineering, Tiangong University
Liu Tao	1. Key Laboratory of Intelligent Control of Electrical Equipment,2. School of Electrical and Electronic Engineering, Tiangong University

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中文摘要:

针对开关磁阻电机调速系统功率器件故障的在线诊断问题,以不对称半桥功率变换器为研究对象,提出一种基于直流分量、谱比特征值和转速脉动特征值的功率管故障在线诊断方法。根据功率变换器发生开路故障后相电流频谱中直流分量趋于零、发生短路故障后直流分量急剧增大的特点,在利用相对谱比系数判断短路故障的基础上对其计算方法进行改进,提出了谱比特征值的概念,并将直流分量的幅值与谱比特征值用于检测故障类型,避免了大量运算对在线检测的不利影响。另外,根据同一相中位置管和斩波管发生短路故障后电机转速脉动大小不同的特点,提出将故障前后转速脉动系数的比值作为转速脉动特征值,并根据转速脉动特征值的变化定位故障功率管。所提出的方法可以快速检测故障类型、故障相并定位故障功率管, 解决了目前开关磁阻电机功率变换器故障在线检测方法存在的响应时间长、运算量大、不能定位故障功率管等缺点。最后通过实验,验证了该方法的可行性和有效性。

英文摘要:

Aiming at the online fault diagnosis of power devices in the switched reluctance drive, an on-line diagnosis method of transistors short-circuit and open-circuit fault is proposed based on DC component, spectral ratio eigenvalue and speed ripple coefficient ratio, taking the asymmetric half-bridge power converter as the research object. According to the characteristics that the DC component in the phase current tends to be zero after an open circuit fault occurs in the power converter, and the DC component spectrum increases rapidly after a short circuit fault occurs, the calculation method is improved on the basis of diagnosing the short-circuit fault by using the relative spectral ratio coefficient. The concept of the characteristic value of the spectral ratio is introduced, and the amplitude of the DC component and the characteristic value of the spectral ratio are used to detect the fault type, avoiding the adverse effect of a large number of calculations on the online diagnosis. According to the different characteristics of the speed pulsation change after the short circuit fault of different transistors in the same phase, the speed pulsation coefficient is applied to the fault diagnosis, and the ratio of the speed pulsation coefficient is used as speed ripple characteristic value, the change of the speed ripple characteristic value is used to locate the faulty component. This method can quickly detect the fault type, fault phase and locate the faulty component, which solves the shortcomings of the current online diagnosis method, such as long response time, large amount of calculation, and hard to find faulty transistor. Finally, simulations and experiments verify the feasibility and effectiveness of the method.

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