Driving method and driver of brushless DC motor

Details Driving method and driver of brushless DC motor Driving method and driver of brushless DC motor

2004-11-16

2008-09-23

McCloud, Renata (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400420

Reexamination Certificate

active

07427841

ABSTRACT:
A method of driving a brushless DC motor includes operations of rectifying an AC voltage of an AC power source by a rectifier circuit to which a capacitor is coupled between its output terminals and the AC voltage of the AC power source is input; driving the motor by an inverter coupled to the rectifier circuit; detecting a rotor position of the motor by a position detector based on a motor back electromotive force or a motor current; estimating the rotor position by a position estimator when the rotor position is not detectable by the position detector; and controlling the inverter by a controller based on the rotor position detected by the position detector or the rotor position estimated by the position estimator.

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International Search Report for application No. PCT/JP2004/016972 dated Dec. 21, 2004.

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