Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-06-19
2007-06-19
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S635000, C318S259000, C318S270000
Reexamination Certificate
active
11217752
ABSTRACT:
A system controls an induction motor driven by a power inverter circuit. An operational amplifier circuit is operatively connected to the power inverter circuit and operative therewith for sensing DC current and controlling acceleration and deceleration of the induction motor. The operational amplifier circuit includes a first operational amplifier operative in a motoring mode to have a positive polarity output and remain substantially at zero during a regeneration mode. A second operational amplifier circuit is operative in a regeneration mode to have a negative polarity output and remain substantially at zero in a motoring mode.
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Hopkins Thomas L.
Ramamoorthy Ramesh T.
Donovan Lincoln
Jorgenson Lisa K.
McCloud Renata
Regan Christopher F.
STMicroelectronics Inc.
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