Sensorless estimation of rotor position of cylindrical brushless DC motors using eddy current

Author

Tomita, Mutuwo ; Satoh, Mitsuhiko ; Yamaguchi, Hideyuki ; Doki, Shinji ; Okuma, Shigeru

Author_Institution

Dept. of Electr. Eng., Nagoya Univ., Japan

Volume

1

fYear

1996

fDate

18-21 Mar 1996

Firstpage

24

Abstract

A rotor position estimation of a cylindrical brushless DC motor at a standstill has been difficult, and the realization has been desired. This paper proposes a simple processing of a rotor by pasting non-magnetic materials where eddy currents can flow on the rotor surface. This process causes a change of amplitude of the phase current according to the rotor position. The experimental results show that the rotor position estimation with maximum error of 26° electrical angle has been realized, which is useful for 120° conduction type cylindrical brushless DC motors

Keywords

brushless DC motors; eddy currents; magnetic circuits; position control; rotors; cylindrical brushless DC motors; eddy current; phase current; rotor position estimation; sensorless position estimation; Brushless DC motors; Brushless motors; Coils; DC motors; Eddy currents; Inductance; Magnetic circuits; Magnetic materials; Phase change materials; Rotors;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Motion Control, 1996. AMC '96-MIE. Proceedings., 1996 4th International Workshop on

Conference_Location

Mie

Print_ISBN

0-7803-3219-9

Type

conf

DOI

10.1109/AMC.1996.509374

Filename

509374