Patent ID: 7199542

Claim:
A fan operation adaptive control system for use with an electronic system equipped with at least one heat-dissipating fan unit and a temperature sensor for the purpose of providing the fan unit with an adaptive operation control function in response to a detected temperature level by the temperature sensor; the fan operation adaptive control system comprising: a fan type identifying module, which is capable of identifying the particular type of the fan unit being installed to the electronic system; a driving signal setting module, which is capable of generating a corresponding driving signal enable message and a corresponding switching enable message based on the particular type of the fan unit identified by the fan type identifying module; a pulse width modulation signal generating module, which is capable of responding to the currently detected temperature level by the temperature sensor and being set by the driving signal enable message from the driving signal setting module by generating a pulse width modulation signal having a width in proportion to the detected temperature level; a direct current conversion module, which is capable of converting the output pulse width modulation signal from the pulse width modulation signal generating module into a direct current electrical signal; and a switching module, which is capable of responding to the switching enable message from the driving signal setting module by selectively switching its output between the output of the pulse width modulation signal generating module and the output of the direct current conversion module, in such a manner that in the event of the fan unit being a pulse width signal driven type, the switching module is activated by the switching enable message to select the output of the pulse width modulation signal generating module as its output to the fan unit for use to drive the fan unit; and whereas in the event of the fan unit being a direct current driven type, the switching module is activated to select the output of the direct current conversion module as its output to the fan unit for use to drive the fan unit.