Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Reexamination Certificate
2007-07-17
2007-07-17
Owens, Douglas W. (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Impedance or current regulator in the supply circuit
C315S276000, C363S021010
Reexamination Certificate
active
11258390
ABSTRACT:
A power conversion device has a series circuit of a main switching element and a sub-switching element connected to both ends of a DC power supply, an insulating transformer, and control circuits. The main switching and sub-switching elements are alternately turned on and off by the respective control circuits such that voltage generated in the secondary coil is subjected to smoothing rectification and supplied to a load. The insulating transformer includes a primary coil, and the main control circuit takes voltage of the primary coil as signal voltage to cause the main switching element to turn on and off such that DC voltage supplied to the load is constant. The sub-control circuit turns on the sub-switching element when the voltage at both ends of the sub-switching element becomes lower than a reference voltage or when the voltage of the primary coil exceeds a predetermined value. The power supply voltage of the main control circuit is taken as a voltage obtained by subjecting the voltage of the coil to smoothing rectification, and the power supply voltage of the sub-control circuit is obtained by the on operation of the main switching element.
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Kuwabara Kesanobu
Nishikawa Yukihiro
Fuji Electric Device Technology Co. Ltd.
Owens Douglas W.
Rossi Kimms & McDowell LLP
Vu Jimmy
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