Patent ID: 7750586
Filing Date: 2010-07-06
Classification: H02P

Abstract:
1. A drive control device of a poly-phase direct current motor, comprising: an induced voltage detecting unit that detects an induced voltage of coils of a stator of the poly-phase direct current motor wherein when such a current that a rotor of the poly-phase direct current motor does not react is passed through any two phase coils of the poly-phase direct current motor in succession, the induced voltage detecting unit detects the voltage induced in a non-conducting phase; and a polarity detection unit that determines a polarity of the induced voltage detected by the induced voltage detection unit and that determines the average value of the induced voltages in the non-conducting phases, wherein a value equivalent to an average value of induced voltages in all phases of the poly-phase direct current motor is determined and a polarity of induced voltage in each phase of the poly-phase direct current motor is determined by comparison of the detected induced voltages of the respective phases with the value equivalent to the average value, and wherein a phase coil of the poly-phase direct current motor through which a current should be passed to rotate the rotor and the direction of energization are determined based on results of the detection of induced voltages and the determined polarity in respective phases of the poly-phase direct current motor for rotating and starting-up of the rotor of the poly-phase direct current motor.