Electricity: motive power systems – Switched reluctance motor commutation control
Reexamination Certificate
2007-07-03
2007-07-03
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Switched reluctance motor commutation control
C318S132000, C318S434000, C318S430000, C318S281000
Reexamination Certificate
active
10739544
ABSTRACT:
Various embodiments of an electrical motor, a brushless DC motor controller, and applications thereof. In one embodiment, a fluid-moving device is provided with a brushless DC motor and a motor controller. The controller may include a set of comparators and a clocked digital circuit. The set of comparators are each configured to determine a voltage polarity on a respective winding of a stator. The clocked digital circuit is configured to receive polarity signals from the comparators and configured to detect in the polarity signals zero crossings having an expected crossing direction. The clocked digital circuit is also configured to determine a commutational sequence for energizing windings on the stator. Other embodiments may include a disk drive, an implantable medical device, a vehicle, and a downhole tool.
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Halliburton Energy Service,s Inc.
Krueger Iselin LLP
Leykin Rita
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