Electric power conversion systems – Current conversion – With starting arrangement
Reexamination Certificate
2011-07-05
2011-07-05
Behm, Harry (Department: 2838)
Electric power conversion systems
Current conversion
With starting arrangement
C363S021100, C363S021180, C323S901000
Reexamination Certificate
active
07974110
ABSTRACT:
A switching power supply unit is provided which provides improved response for frequency switching with a smooth rise in voltage. The switching power supply unit includes: a rectifier circuit for rectifying an alternating current from an AC power source into a direct current; a switching circuit for switching the current rectified by this rectifier circuit using a switching device; a pulse oscillator circuit for outputting a switching signal to the switching device; and a transformer circuit for stepping a voltage up or down depending on the current switched by this switching circuit. A frequency switching unit is also used to detect a pulse output from the switching circuit. Based on the state of this pulse output, the frequency switching unit changes a resistance using resistors, thereby switching the frequency of the switching signal in the pulse oscillator circuit.
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Behm Harry
Ecopower Design Co., Ltd.
Grubb Matthew
Porzio, Bromberg & Newman P.C.
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