Patent ID: 6400107
Filing Date: 2002-06-04
Classification: H02P

Abstract:
A motor control device for driving and controlling a synchronous motor formed of a rotor provided with a permanent magnet and drive means for driving said synchronous motor without using a position sensor, comprising:180Â°-conduction drive means for performing 180Â°-conduction drive of said synchronous motor; intermittent-conduction drive means for performing intermittent-conduction drive of said synchronous motor with a conduction angle smaller than 180 degrees and an unconduction period; motor disturbance monitoring means for monitoring a disturbance against at least one of said synchronous motor and said drive means by detecting variation of a physical value affecting tho driving and controlling of said synchronous motor; and drive method selecting means for selecting one of said 180Â°-conduction drive and said intermittent-conduction drive as a drive method of said synchronous motor in accordance with an output of said motor disturbance monitoring means.