Brushless motor control method and controller

Details Brushless motor control method and controller Brushless motor control method and controller

2005-04-12

2005-04-12

Duda, Rina (Department: 2837)

Electricity: motive power systems

Induction motor systems

C318S434000, C318S132000, C318S700000

Reexamination Certificate

active

06879129

ABSTRACT:
In a brushless motor control method and a brushless motor controller in accordance with the present invention, a rotor rotation position detection means detects the time of the intersection of a detected induced voltage and an induced voltage reference value. In addition, a motor speed calculation means calculates the rotation speed of a brushless motor on the basis of the interval of the intersection times detected by the rotor rotation position detection means. Furthermore, a speed control means outputs a duty factor index on the basis of the deviation between the command speed and the rotation speed of the brushless motor. Still further, a switching signal generation means outputs switching signals to groups of switching devices on the basis of the rotation speed and the duty factor index at the time of the intersection.

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