Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1998-11-02
1999-09-14
Berhane, Adolf Deneke
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 49, 363 56, H02M 3335
Patent
active
059532190
ABSTRACT:
A control power supply circuit adapted for the reduction of conduction loss at a low load and for providing overcurrent protection operation. The control power supply circuit operates to supply power having a control voltage to a control circuit. In addition to a main power supply circuit in which an output voltage from an auxiliary coil flows through diodes, a choke coil, and a power source capacitor to be rectified and smoothed, and the power is supplied for the control circuit from the main power supply circuit, and wherein a start-up circuit in which an output voltage from an input power source flows through a resistor and transistors, and wherein power is supplied to the control circuit at starting-up and during overvoltage protection operation, there is provided in the control power supply circuit an auxiliary power supply circuit in which an output voltage from the auxiliary coil is rectified and smoothed by a rectifying circuit and a capacitor and stabilized at the control voltage by a transistor acting as a series regulator, and the power is supplied to the control circuit at a low load and during overcurrent protection operation.
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Berhane Adolf Deneke
Murata Manufacturing Co. Ltd.
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