Method and system for a variable speed fan control for...

Details Method and system for a variable speed fan control for... Method and system for a variable speed fan control for...

2006-09-05

2006-09-05

Masih, Karen (Department: 2837)

Electricity: motive power systems

Plural diverse motor controls

Running-speed control

C318S471000, C388S934000

Reexamination Certificate

active

07102308

ABSTRACT:
A method and system for variable speed fan control for thermal management of a device includes disposing a first temperature sensor proximate a variable speed fan to measure an air temperature of inlet air Tairthat cools the device by convection air flow. A controller is configured to compensate for changes in Tairby varying a convection coefficient (h) which is a strong function of air velocity to maintain the product of h*ΔT at a constant value, wherein ΔT is a temperature differential between the device (TAD) minus Tair. Thus, h is varied by varying air velocity by varying a speed of the variable speed fan.

REFERENCES:
patent: 4969167 (1990-11-01), Zupancic et al.
patent: 5444752 (1995-08-01), Dobbs et al.
patent: 6385292 (2002-05-01), Dunham et al.
patent: 6723970 (2004-04-01), Whipple, Jr.
patent: 6735499 (2004-05-01), Ohki et al.
patent: 2003/0188538 (2003-10-01), Chu et al.

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