Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2007-08-28
2007-08-28
Le, Dang (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S266000, C310S268000, C180S065510, C180S065600
Reexamination Certificate
active
10903929
ABSTRACT:
Methods and apparatus are provided for an electric vehicle embodying an axial flux traction motor directly coupled to a wheel thereof. The fraction motor includes a stator having coils for producing a magnetic field, an annular rotor magnetically coupled to the stator and mechanically to an output shaft Permanent magnets of alternating polarity are mounted on the annular rotor. Magnetic shunts bridge a portion of the stator slots above the coils. The magnets are arranged in groups with group-to-group spacing exceeding magnet-to-magnet spacing. Adjacent edges of the magnets diverge. The method comprises, looking up d- and q-axis currents to provide the requested torque and motor speed for the available DC voltage, combining at least one of the d- and q-axis currents with a field weakening correction term, converting the result from synchronous to stationary frame and operating an inverter therewith to provide current to the coils of the motor.
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Caricchi Federico
Crescimbini Fabio
Hiti Silva
Nagashima James M.
Patel Nitinkumar R.
DeVries Christopher
General Motors Corporation
Le Dang
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