Fan motor speed control circuit and voltage-regulating...

Details Fan motor speed control circuit and voltage-regulating... Fan motor speed control circuit and voltage-regulating...

2008-01-29

2008-01-29

Patel, Rajnikant B. (Department: 2838)

Electricity: motive power systems

Plural diverse motor controls

Running-speed control

C318S434000

Reexamination Certificate

active

11111807

ABSTRACT:
A fan motor speed control circuit and a voltage-regulating module thereof are disclosed. The fan motor speed control circuit includes the voltage-regulating module and a driving module electrically connected to the voltage-regulating module. The driving module includes a pulse signal generating unit, a speed control unit, and a drive unit. The speed control unit compares a high frequency pulse signal generated by the pulse signal generating unit with a variable reference voltage signal output by the voltage-regulating module, and then outputs a control signal to the drive unit to proceed the speed control of the fan motor. In application, the voltage-regulating module and the driving module are electrically connected to a voltage source in parallel.

REFERENCES:
patent: 5457766 (1995-10-01), Ko
patent: RE35124 (1995-12-01), Erdman et al.
patent: 5606232 (1997-02-01), Harlan et al.
patent: 2622928 (2004-06-01), None

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