Motor control circuit and method thereof

Details Motor control circuit and method thereof Motor control circuit and method thereof

2005-10-25

2008-11-11

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

Reexamination Certificate

active

07449849

ABSTRACT:
A motor control circuit and method thereof serving a coil for controlling the motor. The motor control circuit comprises a separated signal generating circuit generating a separated signal and a comparator comparing a first phase signal from a Hall element or a second phase signal from a phase signal generating circuit with the separated signal. Thus, a motor speed control signal is generated to control the motor. The noise is reduced during controlling the motor.

REFERENCES:
patent: 4804892 (1989-02-01), Muller
patent: 6812667 (2004-11-01), Yasohara et al.
patent: S59-176395 (1984-11-01), None
patent: 07-322629 (1995-12-01), None
patent: 10-201280 (1998-07-01), None
patent: 2002-171784 (2002-06-01), None

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