DRIVING APPARATUS AND METHOD FOR BRUSHLESS MOTOR

摘要

PROBLEM TO BE SOLVED: To improve conventional disadvantages such as the occurrence of large vibration when a brushless motor is driven in a rectangular wave at a low speed and resulting in low efficiency, including that of an inverter when it is sinewave driven at a high speed. SOLUTION: Control switching of sine-wave driving to rectangular-wave driving is performed by detecting an induced voltage and defining its phase. The control switching of the rectangular-wave driving to the sine-wave driving is performed after a convergence calculation of an internal sine-wave driving algorithm.