Title :
A sensorless estimation of rotor position of cylindrical brushless DC motors using eddy current
Author :
Tomita, Mutuwo ; Doki, Shinji ; Yamaguchi, Hideyuki ; Okuma, Shigeru
Author_Institution :
Okuma Lab., Nagoya Univ., Japan
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 such that nonmagnetic materials are pasted on a rotor surface which allows eddy currents to flow. This processing causes a change of a voltage of an opened phase according to a rotor position. The experimental results show that the rotor position estimation of which maximum error was 19° at an electrical angle was realized
Keywords :
brushless DC motors; eddy currents; inductance; parameter estimation; rotors; cylindrical brushless DC motors; eddy current; inductance change; nonmagnetic materials; opened phase; rotor position; rotor surface; sensorless estimation; standstill; voltage change; Brushless DC motors; Coils; DC motors; Eddy currents; Inductance; Phase change materials; Phase detection; Phase estimation; Rotors; Voltage;
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
DOI :
10.1109/IECON.1996.570677
