Electricity: motive power systems – Switched reluctance motor commutation control
Reexamination Certificate
2007-07-31
2007-07-31
Masih, Karen (Department: 2837)
Electricity: motive power systems
Switched reluctance motor commutation control
C318S434000, C318S132000, C322S025000
Reexamination Certificate
active
11307491
ABSTRACT:
A driving circuit of a fan includes a magnetic pole sensor for generating a magnetic pole sensing signal, a first waveform generator coupled to the magnetic pole sensor for generating a first waveform according to the magnetic pole sensing signal, a second waveform generator for generating a second waveform, a comparison circuit coupled to the first waveform generator and the second waveform generator for comparing the first waveform and the second waveform for generating a third waveform, a control signal generator coupled to the comparison circuit for generating a control signal according to the third waveform and an external signal, and a current generator coupled to the magnetic pole sensor and the control signal generator for outputting current to a coil of a stator of the fan according to the magnetic pole sensing signal and the control signal.
REFERENCES:
patent: 2005/0231174 (2005-10-01), Iwatani
Hung Kung-Ching
Yang Chih-Shih
Masih Karen
Prolific Technology Inc.
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