Fan motor controller

Details Fan motor controller Fan motor controller

2007-02-21

2009-02-24

Benson, Walter (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400340, C318S400350, C388S815000

Reexamination Certificate

active

07495402

ABSTRACT:
A fan motor controller comprised of a power supply unit, three driving circuits, three power output circuits, a microprocessor, a voltage raising and compensation circuit, a Back-EMF sensing circuit, a current-limit protection circuit, and a speed control circuit. The fan motor controller eliminates the use of a Hall sensor, enables the field effect power transistor of the works in full conduction of each power output circuit to work in full conduction so as to lower the temperature.

REFERENCES:
patent: 5847530 (1998-12-01), Hill
patent: 2004/0007998 (2004-01-01), Yasohara et al.
patent: 2004/0041530 (2004-03-01), Peterson
patent: 2004/0251860 (2004-12-01), Ehsani et al.

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