Rotor position estimation based on magnetic saliency of an IPM motor-realization of a wide-speed range from zero to the rated speed

This paper describes position estimation based on magnetic saliency of an interior permanent magnet synchronous motor (IPM motor) for the purpose of achieving a wide-speed range. The position estimation, which has been proposed by the authors, is characterized by the real-time algorithm estimating the rotor position at every PWM period. Selection of PWM patterns proposed in this paper expands the speed range capable of estimating the rotor position to a higher-speed range. The PWM patterns are switched over, depending on an amplitude and phase of the average output voltage vector. Experimental results obtained from an IPM motor drive system of 100 W demonstrate that the selection of the PWM patterns makes it possible to estimate the rotor position in a wide-speed range from zero to the rated speed.

[1]  Shin-ichi Kondo,et al.  Armature current locus based estimation method of rotor position of permanent magnet synchronous motor without mechanical sensor , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[2]  Stephen Wolfram,et al.  Mathematica: a system for doing mathematics by computer (2nd ed.) , 1991 .

[3]  Nobuyuki Matsui,et al.  A novel starting method of sensorless salient-pole brushless motor , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[4]  A. Nabae,et al.  A novel PWM scheme of voltage source inverters based on space vector theory , 1990 .

[5]  Hirofumi Akagi,et al.  Implementation and position control performance of a position-sensorless IPM motor drive system based on magnetic saliency , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[6]  A. Vandenput,et al.  Sensorless direct field orientation at zero flux frequency , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[7]  M. Schroedl,et al.  Sensorless control of AC machines at low speed and standstill based on the "INFORM" method , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[8]  Hirofumi Akagi,et al.  An approach to real-time position estimation at zero and low speed for a PM motor based on saliency , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[9]  M. J. Corley,et al.  Rotor position and velocity estimation for a permanent magnet synchronous machine at standstill and high speeds , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[10]  Robert D. Lorenz,et al.  Transducerless position and velocity estimation in induction and salient AC machines , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.