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

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 548-549)
• Pages: 1139-1142
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.548-549.1139
• Online since: April 2014
• Authors: Xiaomin Zhou*, Xiang Hua Ma, Xin Qi
• Keywords: High Frequency Injection Method, Permanent Magnet Synchronous Motor (PMSM), Rotor Position Self-Sensing, Wavelet De-Noising

References

[1] Grzesiak L. M, Kazmierkowski M.P. Improving flux and speed estimators for sensorless AC drives. Industrial Electronics Magazine, IEEE , Vol. 1, pp.8-19, (2007).

DOI: 10.1109/mie.2007.901483

[2] Rotor Position Self-sensing of Sensorless Permanent Synchronous Motor Based on Fluctuating High-frequency Voltage Signal Injection, micro motor, Vol. 3, pp.13-15, (2008).

[3] Ji-Liang Shi, Tian-Hua Liu, Yung-Chi Chang. Position Control of an Interior Permanent Magnet Synchronous Motor without Using a Shaft Position Sensor. Industrial Electronics, IEEE Transactions. Vol. 54, pp.1989-2000, June (2007).

DOI: 10.1109/tie.2007.895137

[4] Bisheimer. G, Sonnaillon. M. O, De Angelo. C. H etc. Permanent Magnet Motor Control in Full Speed Range without Mechanical Sensors. 12th International Power Electronics and Motion Control Conference, pp.349-354, Aug. (2006).

DOI: 10.1109/epepemc.2006.283184

[5] Alonge. F, Di Tommaso. A. O, Miceli. R etc. Sensorless control of permanent magnet synchronous motors for wide speed range applications. Power Electronics, Electrical Drives, Automation and Motion, International Symposium , Vol. 5, pp.1008-1013, (2006).

DOI: 10.1109/speedam.2006.1649915

[6] M. Jansen ,A. Bultheel. Asymptotic behavior of the minimum mean squared error threshold for noisy wavelet coefficients of piecewise smooth signals. IEEE Trans. on Signal Proc., Vol. 49, pp.1113-1118, (2001).

DOI: 10.1109/78.923292

[7] Sylvain Sardy. Minimax threshold for denoising complex signals with waveshrink. IEEE Trans. Signal Processing. Vol. 48, pp.1023-1028, (2000).

DOI: 10.1109/78.827536

[8] Su Wei- jun, Zhou Ying. Wavelet Transform Threshold Noise Reduction Methods and the Application in Engineering. Control & Automation . Vol. 24, pp.281-283, (2008).