Driving device and driving method for motor, cooling device and electronic machine

摘要

The present disclosure provides a device and a method for driving a motor that demonstrates low noise and/or low vibration. A pulse-modulated control pulse signal S2 is generated by a driving signal generation portion 310 at each phase. A driving voltage VU˜VW, with duty cycle corresponding to the control pulse signal S2 and being inserted with specific idle time is applied to coils LU˜LW at each phase. A current phase detection signal S3 indicating a phase of the current IL flowing through the coil LU is generated by the current phase detection portion 330 at a specific phase (the phase U) corresponding to the control pulse signal S2 according to a pulse width of a terminal voltage VU at one end of the coil LU of the phase U.

主权项

1. A driving device for a brushless direct current motor, comprising:
a driving signal generation portion, generating a pulse-modulated control pulse signal at each phase; a driver, generating, at each phase, a driving voltage with duty cycle corresponding to the control pulse signal, the driving voltage being inserted with specific idle time, and applying the driving voltage to a coil of each phase; and a current phase detection portion, generating a current phase detection signal indicating a phase of current flowing in the coil at a specific phase corresponding to the control pulse signal, according to a pulse width of a terminal voltage of a terminal of the coil at the specific phase.