Method for implementing bootstrap-supply charging in a motor controller at energized motor and motor controller using such a method
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United States of America Patent
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Oct 14, 2014
Grant Date -
Feb 14, 2013
app pub date -
Feb 18, 2011
filing date -
Feb 18, 2010
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Abstract
The present invention relates to a motor controller employing bootstrap-capacitor supplies and in particular to the situation where the bootstrap supplies have to be charged, while the motor controller is connected to a spinning and energized motor. The present invention introduces a method of recharging based on choosing a recharging sequence from a set of recharging sequences, where the choice depends on the state of the connected motor and in particular on the back-EMF voltages of the motor.
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