Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2011-01-18
2011-01-18
Benson, Walter (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S727000, C318S767000, C318S798000, C318S799000, C318S800000
Reexamination Certificate
active
07872441
ABSTRACT:
Systems, apparatus, and methods for operating inductors in a Z-source inverter in a continuous current mode are provided. One system includes an AC motor, a Z-source inverter, and a processor. The inverter is configured to provide current and reactive power to the AC motor. The processor is configured to monitor the current and instruct the inverter to provide a greater amount of reactive power to the AC motor if the current is below/equal to a threshold amount. An apparatus includes means for determining if current produced by the inverter is below/equal to a threshold amount, and means for altering voltage commands supplied to the inverter so that an AC motor is induced to draw additional reactive power. One method includes determining if a plurality of inductors are providing a threshold current amount, and inducing a motor to draw more reactive power if the current is below/equal to the threshold amount.
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Gallegos-Lopez Gabriel
Kajouke Lateef A.
Benson Walter
Chan Kawing
GM Global Technology Operations LLC
Ingrassia Fisher & Lorenz P.C.
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