Brushless DC fan motor driving circuit

Details Brushless DC fan motor driving circuit Brushless DC fan motor driving circuit

2007-02-13

2007-02-13

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

Reexamination Certificate

active

10834924

ABSTRACT:
The present invention is a brushless DC fan motor driving circuit, comprising a control unit, a Hall element, a temperature sensor with negative temperature coefficient, and a motor, as tied in with a plurality of resistors, capacitors, diodes and transistors. Accordingly, through sensing environment temperature by the temperature sensor and feeding back the temperature sensed to the motor to control the resolving speed, the ambient temperature of the system is maintained.

REFERENCES:
patent: 4070606 (1978-01-01), Morozumi et al.
patent: 4169990 (1979-10-01), Lerdman
patent: 4495450 (1985-01-01), Tokizaki et al.
patent: 5267842 (1993-12-01), Harmsen et al.
patent: 5744921 (1998-04-01), Makaran
patent: 6396231 (2002-05-01), Horng et al.
patent: 6611410 (2003-08-01), Makaran
patent: 2005/0035732 (2005-02-01), Horng et al.
Sanyo, LB1868M Two-Phase Brushless Fan Motor Driver data sheet, Aug. 2000, pp. 1 and 3-4.

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