Electricity: motive power systems – Induction motor systems – Secondary circuit control
Reexamination Certificate
2005-01-18
2005-01-18
Martin, David (Department: 2837)
Electricity: motive power systems
Induction motor systems
Secondary circuit control
C318S822000, C318S806000, C318S432000
Reexamination Certificate
active
06844701
ABSTRACT:
Systems and methods for controlling an induction motor including detecting a field weakening operation state of the motor, wherein the field weakening operation state is detected when a flux current, Id, in the motor is reduced to a predetermined fraction of its normal, non-voltage limited value. The systems and methods also including an overmodulation operation state of the motor before said field weakening operation state is detected and enabling the overmodulation operation state of the motor after said field weakening operation state is detected.
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Chen Li
Hampo Richard J.
Nallapa Venkatapathi R.
Ballard Power Systems Corporation
Martin David
Martin Edgardo San
Seed IP Law Group PLLC
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