Phase control circuit for brushless motor, brushless motor and method for controlling the phase of brushless motor
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United States of America Patent
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Aug 22, 2017
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app pub date -
Jan 12, 2016
filing date -
Sep 30, 2013
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Abstract
A phase control circuit for a brushless motor includes a signal output unit that outputs M signals, whose phases differ from each other, in response to a change in the magnetic field resulting from the rotation of magnets placed in a rotor, and a control signal generator that generates two or more different kinds of group of phase control signals, based on at least the M signals, the group of phase control signals being used to control drive voltages, whose phases differ from each other, which are supplied to each phase of an N-phase coil (N being an integer greater than or equal to two). The control signal generator is configured such that a first phase control signal group and a second phase control signal group can be generated.
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