Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Reexamination Certificate
2011-05-24
2011-05-24
Benson, Walter (Department: 2837)
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
C318S599000, C318S634000, C318S400080
Reexamination Certificate
active
07949233
ABSTRACT:
A method for controlling a heat-dissipating fan for an electronic component includes the steps of: detecting a temperature of the electronic component, and outputting a first control signal corresponding to the temperature thus detected; receiving a load current of the electronic component, and converting the load current into a second control signal; and controlling a rotating speed of the heat-dissipating fan with reference to the first control signal and the second control signal. A device employing the method includes a current detecting module adapted for detecting a load current, a temperature control circuit adapted for detecting a temperature, and a logic circuit unit coupled to the current detecting module and the temperature control circuit and controlling a rotating speed of a heat-dissipating fan.
REFERENCES:
patent: 5828200 (1998-10-01), Ligman et al.
patent: 7038415 (2006-05-01), Nakamura et al.
patent: 7142423 (2006-11-01), Lanni
patent: 2008/0304303 (2008-12-01), Hsieh et al.
Chiang Yi-Tung
Huang I-Huei
Liao Nien-Yu
Acer Incorporated
Benson Walter
Glass Erick
The Webb Law Firm
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