Initial Rotor Polarity Detection and Sensorless Control of PM Synchronous Machines

Author

Holtz, Joachim

Author_Institution

Electr. Machines & Drives Group, Wuppertal Univ.

Volume

4

fYear

2006

fDate

8-12 Oct. 2006

Firstpage

2040

Lastpage

2047

Abstract

Sensorless control of a PM synchronous machine at low and zero speed is based on the injection of an oscillating high-frequency carrier signal. A particular demodulation technique serves to eliminate the estimation error introduced by the nonlinear characteristics of the inverter. The initial rotor position and the magnet polarity is detected before the drive is started. The initialization is performed by injecting an ac carrier and two short current pulses in a sequence

Keywords

PWM invertors; machine control; permanent magnet machines; position control; reluctance motor drives; rotors; starting; synchronous machines; ac carrier signal injection; demodulation technique; estimation error; high-frequency signal injection; initial rotor polarity detection; initial rotor position; magnet polarity; nonlinear inverter characteristics; permanent magnet synchronous motor; sensorless control; zero speed operation; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic flux; Magnetic separation; Perpendicular magnetic anisotropy; Rotors; Saturation magnetization; Sensorless control; Synchronous machines; Voltage; Permanent magnet synchronous motor; initial rotor position; sensorless control; zero speed operation;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE

Conference_Location

Tampa, FL

ISSN

0197-2618

Print_ISBN

1-4244-0364-2

Electronic_ISBN

0197-2618

Type

conf

DOI

10.1109/IAS.2006.256816

Filename

4025504