Motor driving apparatus

Details Motor driving apparatus Motor driving apparatus

2005-12-09

2009-11-03

Benson, Walter (Department: 2837)

Electricity: motive power systems

Induction motor systems

Secondary circuit control

C318S634000, C318S641000, C318S400080

Reexamination Certificate

active

07612521

ABSTRACT:
In a fan motor drive circuit which drives a motor based on a pulse-modulated external control signal, a temperature control signal generator generates a pulse-modulated temperature control signal whose duty ratio changes depending on temperature. A signal synthesizer synthesizes the external control signal and the temperature control signal by a logical operation. A drive controller drives the motor based on output of the signal synthesizer.

REFERENCES:
patent: 6824362 (2004-11-01), Dodson, III
patent: 63-268487 (1988-11-01), None
patent: 7-31190 (1995-01-01), None
patent: 11-69858 (1999-03-01), None
patent: 2001-284868 (2001-10-01), None
International Search Report for International Application No. PCT/JP2005/022627 dated Jan. 17, 2006.
Written Opinion of the International Searching Authority for International Application No. PCT/JP2005/022627.

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