基于母线电流脉动的无刷直流电机断相故障诊断法

A Diagnosis and Detecting Method Based on Current-ripple to Phase-open Fault of BLDCM

无刷直流电动机断相后运行的危害很大,将故障及时地发现与定位,对提高航空稀土永磁(REPM)无刷直流电动机(BLDCM)运行的可靠性及对装备的保障效能,意义十分重大。基于此,在对无刷直流电动机运行与控制特性进行专门的研究后,提出了利用无刷直流电机自身固有的相电流换相脉动特性,通过分析脉动的母线电流,并结合Hall位置信号来诊断与定位断相故障的方法。经过Matlab仿真和实验,验证了理论分析的正确性,为后续稀土永磁无刷直流电动机的断相故障诊断与保护装置研究,提供了科学地参考。

To improve the efficiency of maintaining and servicing Aero REPM -BLDCM, detecting the fault in time is of great importance. Thus, an efficient method of failure diagnosis and mistake detection, by using the inherent characteristic of running BLDCM, through an analysis of bus - current ripple and in combination with Hall position signal, is put forward. Combing with Hall - signal, the DC - link current ripple wave can help filter out the broken switch tube. The correctness of the result based on theoretical analysis is tested and verified by simulation and experiment, which offers a scientific reference for the further researches in electronic protector and fault diagnosis device of REPM - BLDCM.