Electricity: motive power systems – Alternating current commutating motors – Universal or a.c.-d.c. motors
Reexamination Certificate
2007-03-13
2007-03-13
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Alternating current commutating motors
Universal or a.c.-d.c. motors
C388S828000, C388S904000
Reexamination Certificate
active
11300127
ABSTRACT:
A system of detecting position drift in the motor due to lost pulses. Due to imperfections in the motor, the timing of the commutation pulses is not uniform but forms a unique repeatable signature. The system identifies lost pulses by using a pattern recognition technique on the signature of the motor commutation pulse rate. By detecting when a pulse is lost, the system can apply a correction to the pulse count. Accordingly, the real time correction of the pulse count allows for the system to operate with significantly reduced mispositioning errors. In addition, the system requires far fewer calibrations.
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Ro Bentsu
Visteon Global Technologies Inc.
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