System and method for controlling an induction motor
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United States of America Patent
Stats
-
Jun 19, 2007
Grant Date -
Mar 1, 2007
app pub date -
Sep 1, 2005
filing date -
Sep 1, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
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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