The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 25, 1988
Filed:
Mar. 27, 1987
Takeshi Miyashita, Hyogo, JP;
Takao Kawabata, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
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.