AC-DC converter

Details AC-DC converter AC-DC converter

1997-01-10

1998-05-12

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 84, H02M 542

Patent

active

057515670

ABSTRACT:
An AC-DC converter includes an adjusting unit 13 which operates to zero the difference between a DC output voltage instruction value and a DC output voltage detection value; and a modulator 16 which compares a carrier wave based on an output signal of the adjusting unit 13 with a modulating wave to output drive pulses, a switching element 3 is turned on and off with the drive pulses to provide a DC output voltage which is higher than a full-wave rectification voltage of an AC input voltage. In order to obtain the carrier wave, the AC-DC comprises further includes an AC input voltage polarity detector 7, a PLL circuit 11, and a multiplier 14 for multiplying the sine wave by an output signal of the adjusting unit 13.

REFERENCES:
patent: 4825351 (1989-04-01), Uesugi
patent: 5045991 (1991-09-01), Dhyanchand et al.
patent: 5598326 (1997-01-01), Liu et al.
patent: 5615098 (1997-03-01), Ishii et al.

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