Method and apparatus for driving a brushless DC motor

Details Method and apparatus for driving a brushless DC motor Method and apparatus for driving a brushless DC motor

2005-07-25

2008-08-26

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400040, C318S400350, C318S700000

Reexamination Certificate

active

07417390

ABSTRACT:
A drive circuit for a brushless DC motor includes a switch constructed and arranged to drive the motor with a pulse signal responsive to a control signal, and control circuitry coupled to the switch and constructed and arranged to generate the control signal responsive to rotor position information from the motor so as to synchronize the pulse signal to the rotor position. A current sensing device can be used to provide the rotor position information to the control circuitry by sensing current flowing through the motor.

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