公开(公告)号：JPH11233984A

公开(公告)日：1999-08-27

申请号：JP2209198

申请日：1998-02-03

Applicant: IBM

Inventor： ITO NAOMI ,  TSUKAMOTO HIDESHI ,  NAKAMURA TETSUSHI

IPC: H05K7/20 ,  H02P7/00 ,  H02P29/00

Abstract: PROBLEM TO BE SOLVED: To provide a cooling system for appropriately controlling the running of a cooling fan according to generated heat amount, etc., of an electronic device comprising a heat-generating part. SOLUTION: In an optimum value table which describes relation among a fan controller 202 which outputs measurement data regarding the number of rotations of a cooling fan 201, an identifier provided at a heat-generating component such as a CPU card 10, and an optimum number of rotations of a fan, each table entry comprises an optimum value table where at least two optimum number of rotations corresponding to at least two threshold temperatures, a temperature measurement device 204 for measuring the temperature around a heat-generating part, the number of rotations deciding means for deciding the current optimum number of rotations according to the identifier and measured temperature of the heat-generating component, and a cooling system controller which corrects the on/off duty factor of a drive power source supplied to a fan, based on the difference between the optimum number of rotations and actual number of rotations of the fan obtained through the fan controller.