Control circuit for removing ripple of direct current supply sys

Details Control circuit for removing ripple of direct current supply sys Control circuit for removing ripple of direct current supply sys

1987-03-27

1988-10-25

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

363 88, 363 86, H02M 545

Patent

active

047808020

ABSTRACT:
The present invention relates to a power source apparatus for supplying a stabilized D.C. output to an inverter. In a D.C. power source apparatus for an inverter comprising a forward power conversion circuit receiving commercial A.C. power supply for outputting D.C. power such as a thyristor rectifying circuit and control circuit for controlling the D.C. output voltage of said forward power conversion circuit, the disclosed D.C. power source apparatus for an inverter is provided with feedforward control circuit detecting the D.C. input current to the inverter. The D.C. current input to the inverter or a current equivalent thereto is detected by the feedforward control circuit as a detection signal, and based on this detection signal, an A.C. component virtually in phase with the A.C. component input to the inverter is output from the forward power conversion circuit, and thereby, the D.C. voltage ripple to the inverter is decreased.

REFERENCES:
patent: 4158163 (1979-06-01), Eriksen et al.
patent: 4315305 (1982-02-01), Siemon
patent: 4517634 (1985-05-01), Sakai
patent: 4545002 (1985-10-01), Walker
Nippon Denchi K. K. (Japan Battery Co., Ltd.), "Technical Reference on GS CA Type Thyristor Rectifier", Oct. 10, 1982, pp. 8 & 9.

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