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:
Apr. 11, 1978
Filed:
Sep. 28, 1976
Norikazu Tokunaga, Hitachi, JA;
Kohei Yabuno, Hitachi, JA;
Hitachi, Ltd., , JA;
Abstract
A high-voltage power supply device comprising a first DC power source, a first reactor supplied with direct current from this first DC power source, a resistor connected in parallel with the first reactor, a current interrupter initially permitting circulation of the flow of current between it and the first reactor and subsequently interrupting the flow of the circulating current therethrough, at least one auxiliary reactor connected in parallel with the first reactor, a second DC power source supplying direct current to the auxiliary reactor, an auxiliary current interrupter initially permitting circulation of the flow of current between it and the auxiliary reactor and subsequently interrupting the flow of the circulating current therethrough, and a diode and switch means connected between the first reactor and the auxiliary reactor. This switch means is turned off when the direct current is supplied to the first reactor from the first DC power source and turned on when the current is supplied to the first reactor from the auxiliary reactor. The high voltage appearing across the resistor in response to the interruption of the flow of the current circulating through the first reactor and the current interrupter is taken up by the diode and is not applied to the auxiliary reactor and the auxiliary current interrupter, so that the auxiliary reactor and the auxiliary current interrupter can be prevented from being destroyed by the high voltage.