Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Reexamination Certificate
2004-12-10
2009-02-24
Masih, Karen (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
C318S471000, C318S783000
Reexamination Certificate
active
07495400
ABSTRACT:
A temperature control apparatus is suitable for use in devices such as consumer electronics devices having different thermal characteristics. According to an exemplary embodiment, the temperature control apparatus includes a fan having a field winding (F3) and a speed controller for providing a speed control signal to the field winding (F3) responsive to a first control signal to control a rotating speed of the fan. First and second terminals of the fan enable operating power to be provided to the field winding (F3) and the speed controller. At least one of the first and second terminals is operatively coupled to a first voltage source. A third terminal of the fan provides the first control signal to the speed controller, and is operatively coupled to a second voltage source. The temperature control apparatus further includes a temperature measuring circuit operative to measure a temperature and provide a temperature indicating signal indicating the measured temperature, a processor operative to provide a second control signal responsive to the temperature indicating signal, and control circuitry operative to provide the first control signal to the third terminal of the fan responsive to the second control signal.
REFERENCES:
patent: 5825642 (1998-10-01), Tshii et al.
patent: 5957663 (1999-09-01), Van Houten et al.
patent: 5971284 (1999-10-01), Hammer
patent: 6182902 (2001-02-01), Shih
patent: 2002/0140389 (2002-10-01), Ohki et al.
patent: 2005/0104460 (2005-05-01), Kusase et al.
patent: 2003-319677 (2003-07-01), None
Lin Reitseng
Masih Karen
Opalach Joseph J.
Shedd Robert D.
Thomson Licensing
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