Patent ID: 8564232
Filing Date: 2013-10-22
Classification: H02P

Abstract:
1. A motor drive control device configured to control driving of a brushless DC motor including a stator having drive coils, a rotor having plural magnetic poles, and plural position detecting units that output position detection signals representing position of the rotor with respect to the stator, the motor drive control device comprising: an abnormality detecting unit configured to detect abnormality of each of the position detection signals; a drive voltage generating unit configured to generate and output, when abnormality of at least one of the position detection signals has been detected by the abnormality detecting unit, drive voltages to the brushless DC motor to drive the brushless DC motor based on at least one of the remaining position detection signals excluding the position detection signal that has been detected as abnormal; and a phase difference detecting unit configured to detect phase differences between the drive voltage generating unit is further configured to generate the drive voltages based on the phase differences and polarities of the remaining position detection signals.