Armature current locus based estimation method of rotor position of permanent magnet synchronous motor without mechanical sensor

Conference · Sat Dec 30 23:00:00 EST 1995

OSTI ID:419485

Kondo, Senji; Takahashi, Akihiko; Nishida, Toshihiro ^[1]

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1. Nagaoka Univ. of Technology (Japan)

This paper describes a new method of estimating the initial rotor position of a permanent magnet (PM) motor without turning the rotor. At the stand still, the saliency of the PM motor makes the locus of the armature current-vector an oval when the armature voltage is 3-phase balanced sine wave applied by a PWM inverter. The major diameter direction of the current-vector locus gives an information on the rotor direction. The shift of the current-vector locus caused by magnetic saturation makes it possible to identify the direction of the rotor magnet N-pole. The proposed method to estimate the rotor position was verified by experimental results of a 100W PM motor.

• OSTI ID: 419485
• Report Number(s): CONF-9510203--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
33 ADVANCED PROPULSION SYSTEMS
CONTROL
ELECTRIC MOTORS
MATHEMATICAL MODELS
SYNCHRONIZATION
TORQUE