Open-Circuit Fault Diagnosis Strategy for Dual-Winding Permanent Magnet Motor Based on High Frequency Current Signal Injection Method

2019 ◽  
Author(s):  
Shaoshuai Wang ◽  
Qiang Li ◽  
Xuefeng Jiang ◽  
Da Xu ◽  
Yunzhi Li ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Permanent Magnet ◽  
High Frequency ◽  
Open Circuit ◽  
Current Signal ◽  
Permanent Magnet Motor ◽  
High Frequency Current ◽  
Signal Injection ◽  
Circuit Fault Diagnosis ◽  
Frequency Current

Study on Wavelet De-Noising of High Frequency Current Signal for Rotor Position Self-Sensing of PMSM

2014 ◽  
Vol 548-549 ◽  
pp. 1139-1142
Author(s):  
Xiao Min Zhou ◽  
Xiang Hua Ma ◽  
Xin Qi
Keyword(s):  
High Frequency ◽  
Sampling Error ◽  
High Reliability ◽  
Low Cost ◽  
Random Noise ◽  
Current Signal ◽  
High Frequency Current ◽  
Rotor Position ◽  
Carrier Signal Injection ◽  
Frequency Current

Self-sensing control of permanent magnet synchronous motor has been a hot research topic of motor control technology, which has the advantages of low cost and high reliability. The use of a high-frequency carrier signal superimposed on the fundamental excitation of PMSM has established itself in recent years as a viable means of eliminating position sensors in ac drives for applications. In the carrier signal injection methods, the rotor position can be estimated by using the carrier signal current resulting from the interaction between the carrier signal voltage and the spatial saliency. The existing sampling error and random noise of high frequency current signal were uncertain to the rotor position self-sensing, that may affect the rotor position self-sensing precision. This paper describes a new wavelet de-noising method of the high-frequency current signal, improving the de-noising results significantly.

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