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:
Feb. 24, 1976
Filed:
Dec. 24, 1974
Hitachi, Ltd., , JA;
Abstract
A power converter which can operate with both a D.C. power source and an A.C. power source for supplying electric power to a D.C. load such as a D.C. motor. The power converter comprises thyristors, a diode, a reactor and a capacitor. A plurality of series circuits each including two series-connected thyristors are connected in parallel to provide A.C. terminals at the series connection points of the thyristors and to provide D.C. terminals at the parallel connection points of the series circuits. The diode is interposed between the parallel-connected series circuits of the thyristors, and the reactor and the capacitor are connected in series to form a series circuit which is connected in parallel with the series circuits of the thyristors. The power converter is connected at the D.C. terminals between the power source and the load to function as a chopper when the power source supplies D.C. power to the load. On the other hand, when the power source supplies A.C. power to the load, the power converter is connected at the A.C. terminals to the power source and at the D.C. terminals to the load to function as a converter or inverter. The desired function of the power converter is obtained by controlling the gate signal applied to the gate of each of the thyristors.