Title:
APPARATUS AND METHOD FOR IDENTIFYING AN OPERATIONAL PHASE AND CONTROLLING ENERGIZATION
Document Type and Number:
WIPO Patent Application WO2003100956
Kind Code:
A9
Abstract:
A method for identifying an operational phase of a motor (203) may include obtaining a first value of a signal that is indicative of the operational phase of the motor (203) and obtaining a second value of the signal after a period of time has expired. The method further includes identifying a first operational phase of the motor (203) if the second value exceeds the first value by a non-negative first threshold value. A second operational phase of the motor (203) is identified if the second value does not exceed the first value by the first threshold value. The first and second operational phases may correspond to relative positions of a motor's rotor and stator, such that periods of energization may be identified for producing motoring or regenerative torque.
Inventors:
RAMU KRISHNAN (US)
BHANOT AJIT (US)
BHANOT AJIT (US)
Application Number:
PCT/US2003/016627
Publication Date:
May 06, 2004
Filing Date:
May 27, 2003
Export Citation:
Assignee:
VIRGINIA TECH INTELL PROP (US)
RAMU KRISHNAN (US)
BHANOT AJIT (US)
RAMU KRISHNAN (US)
BHANOT AJIT (US)
International Classes:
H02K1/06; H02K1/14; H02K1/24; H02K16/00; H02K19/10; H02K21/12; H02P1/16; H02P1/18; H02P6/08; H02P6/20; H02P7/06; H02P25/02; H02P25/08; H02K7/09; H02K16/04; H02K17/00; (IPC1-7): H02P1/46; H02P5/28; H02P7/36
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