Dephasing control
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United States of America Patent
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Aug 27, 2013
Grant Date -
Apr 12, 2012
app pub date -
Oct 11, 2011
filing date -
Oct 11, 2010
priority date (Note) -
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Abstract
A system to control an asynchronous tri-phase motor may include a braking resistance coupled to receive output voltage from the voltage multiplier to dissipate energy when the system is in a braking mode. The system may further include a module to emit a pulse train (e.g., Pulse Width Modulation (PWM)) and having a frequency selectively determined by a microcontroller. The module may be operatively coupled to apply the pulse train to an H bridge circuit in the IGBT module, which is coupled to pass a conditioned line voltage to the tri-phase motor in response to the PWM pulse train applied to the H bridge circuit in the IGBT module.
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