Self calibrating fan

Details Self calibrating fan Self calibrating fan

2007-04-10

2007-04-10

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Speed or rate-of-movement

C318S255000, C318S268000, C318S634000

Reexamination Certificate

active

10835734

ABSTRACT:
A self-calibrating, continuous variable speed fan for use in cooling electronic circuitry is disclosed. Upon initial power-up, in an environment of known temperature, the self-calibrating fan accommodates for the tolerances of its electronic components by reading a voltage from its thermistor array and comparing the actual value to an expected value for the given temperature. The difference is then stored in the non-volatile memory of a microcontroller for use in adjusting future voltage readings from the thermistor array. During normal operation, adjusted readings from the thermistor array are then converted by the microcontroller into a control signal for driving the motor of a cooling fan. A quickly cycling stochastic process between adjustments to fan motor speed and temperature readings is then established, thereby maintaining a high degree of control over the device to be cooled.

REFERENCES:
patent: 4303984 (1981-12-01), Houvig
patent: 4481596 (1984-11-01), Townzen
patent: 5144814 (1992-09-01), Gaudette
patent: 5492273 (1996-02-01), Shah
patent: 5847526 (1998-12-01), Lasko et al.
patent: 5926386 (1999-07-01), Ott et al.
patent: 5970226 (1999-10-01), Hoy et al.
patent: RE36437 (1999-12-01), Hanson et al.
patent: 6061809 (2000-05-01), Glaser et al.
patent: 6318965 (2001-11-01), Nair
patent: 6446019 (2002-09-01), Kynett et al.
patent: 6496340 (2002-12-01), Hornberger et al.
patent: 6501241 (2002-12-01), Tsurumi et al.
patent: 6611117 (2003-08-01), Hardt
patent: 6795268 (2004-09-01), Ryan
patent: 2003/0010089 (2003-01-01), Holmes
patent: 2003/0053913 (2003-03-01), Sekiguchi
patent: 2004/0189221 (2004-09-01), Kurosawa et al.
patent: 2005/0269994 (2005-12-01), Ishishita

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