Title :
Eddy Current Effects on Rotor Position Estimation and Magnetic Pole Identification of PMSM at Zero and Low Speeds
Author :
Hu, Jiangang ; Liu, Jingbo ; Xu, Longya
Author_Institution :
Kinetix Motion Control, Rockwell Autom., Mequon, WI
Abstract :
High-frequency current responses of a permanent magnet synchronous machine (PMSM), with and without considering eddy current effects, are significantly different. This paper investigates the eddy current effects on rotor position estimation. A compensation method is developed to improve the high-frequency-injection-based rotor position estimation of a PMSM at zero and low speeds. The paper also contributes to an improved magnetic pole identification based on space vector pulse width modulation for an arbitrary initial rotor position. The estimation and sensorless control method of PMSM, considering eddy current effects, has been verified by experimental results.
Keywords :
eddy currents; permanent magnet machines; synchronous machines; eddy current effects; high-frequency-injection-based rotor position estimation; low speeds; magnetic pole identification; permanent magnet synchronous machine; space vector pulse width modulation; zero speeds; Couplings; Eddy currents; Inductance; Permanent magnet machines; Poles and zeros; Sensorless control; Space vector pulse width modulation; Stators; Synchronous machines; Voltage; Eddy current effects; initial rotor position; magnetic pole identification; permanent magnet synchronous machine (PMSM); rotor position estimation; sensorless control; space vector pulse width modulation (SVPWM);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2008.2002087