Rotor position estimation method of sensorless PM motor at rest with no sensitivity to armature resistance

Author

Noguchi, Takashi ; Yamada, Kazunori ; Kondo, Seiji ; Takahashi, Isao

Author_Institution

Nagaoka Univ. of Technol., Niigata, Japan

Volume

2

fYear

1996

fDate

5-10 Aug 1996

Firstpage

1171

Abstract

A new rotor position estimation method of a sensorless PM motor at rest is proposed, which has no sensitivity to the armature resistance. The method is based on a saliency of the rotor, and utilizes the alternating magnetic field which is excited by current control. The phase difference between the magnetizing current and the voltage references makes it possible to estimate the rotor direction accurately without motor parameters except the ratio of d-axis and q-axis inductances. In addition, the magnetic pole can be identified evidently using the voltage reference vibration phenomena caused by magnetic saturation

Keywords

electric current control; electric resistance; inductance; machine control; magnetic fields; parameter estimation; permanent magnet motors; rotors; synchronous motors; alternating magnetic field; armature resistance; current control; d-axis inductance; magnetic pole; magnetic saturation; magnetizing current; q-axis inductance; rotor direction estimation; rotor position estimation method; rotor saliency; sensorless PM motor; synchronous motors; voltage reference vibration phenomena; voltage references; Armature; Current control; Difference equations; Electric vehicles; Magnetic fields; Phase estimation; Rotors; Saturation magnetization; Servomotors; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, Control, and Instrumentation, 1996., Proceedings of the 1996 IEEE IECON 22nd International Conference on

Conference_Location

Taipei

Print_ISBN

0-7803-2775-6

Type

conf

DOI

10.1109/IECON.1996.566045

Filename

566045