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:
May. 07, 2002
Filed:
Jun. 26, 2001
Kiyomi Watanabe, Tokyo, JP;
Origin Electric Company, Limited, Tokyo, JP;
Abstract
The charging apparatus charges a load capacitor to a predetermined voltage, and comprises an inverter which is connected to a dc power, a transformer which is connected to the ac side of the inverter, and an inductance which is connected in series to the primary and secondary windings of the transformer and comprises leakage inductance of the transformer, a rectifier which is connected to the secondary side of the transformer, and a switch element which is provided on the secondary side of the transformer. The inverter comprises a switching semiconductor element, connected to the dc power, and a feedback diode, connected in reverse parallel to the switching semiconductor element. The switching element short-circuits the output of the inductance when the charge voltage of the load capacitor has reached a predetermined value, preventing an inertial current, generated by energy which has accumulated in the inductance, from flowing to the load capacitor.