Electricity: motive power systems – Synchronous motor systems
Reexamination Certificate
2005-05-17
2005-05-17
Duda, Rina (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
C318S701000, C318S254100, C318S132000, C318S434000
Reexamination Certificate
active
06894454
ABSTRACT:
A control system for an electric motor including an inverter for providing power to the electric motor, a controller for controlling the inverter, a first motor speed control block in the controller injecting a high frequency signal into the electric motor to determine the speed and position of the electric motor, a second motor speed control block in the controller detecting the back electromotive force to determine the speed and position of the electric motor, and a transition control block in said controller to vary operation between the first motor speed control block and the second motor speed control block.
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Bae Bon-Ho
Nagashima James M.
Patel Nitinkumar R.
Schulz Steven E.
Son Yo-Chan
DeVries Christopher
Duda Rina
General Motors Corporation
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