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Configurable, nonlinear fan control for system-optimized autonomous cooling

  • US 7,219,507 B1
  • Filed: 04/21/2004
  • Issued: 05/22/2007
  • Est. Priority Date: 04/21/2004
  • Status: Active Grant
First Claim
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1. A controller operable to control a fan speed of a fan by approximating a nonlinear temperature control function associated with a temperature control range, the controller operable to approximate the nonlinear temperature control function by:

  • dividing the temperature control range into a plurality of segments, each segment associated with a sub-range of temperatures;

    determining one or more control coefficients for each of the segments; and

    generating a control signal using the one or more control coefficients for at least one of the segments and one or more measured temperatures that have been normalized, the control signal capable of controlling the fan speed of the fan.

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