Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1998-03-30
1999-10-26
Sircus, Brian
Electricity: motive power systems
Switched reluctance motor commutation control
318701, H02K 2300
Patent
active
059734620
ABSTRACT:
A switched reluctance motor drive includes a noise reduction circuit configured to control the decay of current when a motor phase is switched from active to inactive. The current decay is controlled to occur in two stages: a first portion and a second portion. The first portion is controlled by alternately activating and deactivating one of the two switches in the two switch drive topology to obtain a current profile conforming to a predetermined profile. The current decay in the second portion of the inactive interval occurs by keeping both switches off so that it decays naturally. The duration of the first portion of the inactive interval is different for each motor phase, as is the duty cycle of the switch gating signal driving the switch that is alternately activated and deactivated. The scheme reduces the acoustic noise generated during operation of the motor.
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Blackburn Scott E.
Kalpathi Ramani R.
Kolomeitsev Sergei F.
Liu Ning
Dana Corporation
Gossett PLLC Dykema
Sircus Brian
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