Method and apparatus for controlling motor torque
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United States of America Patent
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Aug 27, 2013
Grant Date -
Dec 1, 2011
app pub date -
May 26, 2010
filing date -
May 26, 2010
priority date (Note) -
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Abstract
The subject matter disclosed herein describes a system for controlling torque in a soft starter. In particular, torque ripple is reduced when transitioning between two different operating modes of a soft starter. A soft starter may include a first operating mode, designed for improved performance during low-speed operation of a motor, and a second operating mode, designed for improved performance during high-speed operation of the motor. However, transitioning between two different operating modes may result in significant transient currents in the motor, which, in turn, produce torque in the motor. The system described herein reduces this transient torque production in the motor.
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