A new method to estimate the rotor position of permanent magnet synchronous motor (PMSM) drives over a wide speed range, including zero frequency is introduced. The method measures the motor current derivative in response to the standard pulse width modulation (PWM) sequence to estimate rotor position. No additional signal injection or separate test vectors are required although modification is needed when narrow PWM voltage vectors occur. Three compensation techniques are proposed to improve the quality of the position estimation and reduce current distortion when narrow vectors are used for position estimation. Experimental results for sensorless speed and position control of a 4 kW PMSM verify the effectiveness of the proposed techniques

Title

IET Electric Power Applications, Volume 5, Issue 4, April 2011, p. 359–370, DOI: 10.1049/iet-epa.2010.0108

Publisher

IEEE

Publisher Country

United Kingdom

Indexing

Thomson Reuters

Impact Factor

1.42

Publication Type

Both (Printed and Online)

Volume

5

Year

2011

Pages

359 - 370