Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2008-01-22
2011-11-08
Santana, Eduardo Colon (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S102000, C318S103000, C318S431000
Reexamination Certificate
active
08054030
ABSTRACT:
Permanent magnet alternating current (PMAC) motor systems and methods for starting or restarting PMAC motor system sensorless control algorithms are provided. One system includes a PMAC motor including a rotor, an inverter, and a controller. The controller includes control logic, start/restart logic, drive logic, current detect logic, and estimation logic configured to estimate a position of the rotor, a speed of the PMAC motor, or both based on current detected in each phase of the inverter. A start/restart method includes determining to start/restart the sensorless control algorithm and modifying the inverter voltage in response to the determined start/restart. The method also includes detecting current in each inverter phase after the inverter voltage is modified and estimating a rotor position, a PMAC motor speed, or both based on the current detected in each inverter phase after the inverter voltage is modified. Another controller includes means for performing the above start/restart method.
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Office Action dated Aug. 18, 2011 for U.S. Appl. No. 11/947,501.
Jang Seok-Joo
Nasrabadi Rostam Dehmoobed
Son Yo Chan
Colon Santana Eduardo
GM Global Technology Operations LLC
Ingrassia Fisher & Lorenz P.C.
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