Controller for a free-running motor
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United States of America Patent
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Jul 11, 2017
Grant Date -
Jan 19, 2017
app pub date -
Jul 14, 2015
filing date -
Jul 14, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A controller for controlling a multi-phase motor is described. The controller may be configured to measure a plurality of phase voltages of the multi-phase motor when the multi-phase motor is in an uncontrolled state. The controller may be configured to determine, based on the plurality of measured phase voltages, a position and a velocity of a rotor of the multi-phase motor. The velocity of the rotor includes a speed of the rotor and a direction of the rotor. The controller may be further configured to, responsive to determining that the direction of the rotor is a forward direction and the speed of the rotor satisfies a closed-loop threshold speed: set, based on the position of the rotor and the velocity of the rotor, at least one initial control condition of the rotor, and control, using closed-loop control and based on the at least one initial control condition, the rotor.
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