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:
Mar. 24, 2020
Filed:
Feb. 08, 2019
Kabushiki Kaisha Toshiba, Minato-ku, JP;
Motofumi Tanaka, Yokohama, JP;
Toshiki Osako, Kawasaki, JP;
Hiroki Murayama, Yokohama, JP;
Naoto Shinohara, Kawasaki, JP;
Hiroyuki Yasui, Yokohama, JP;
KABUSHIKI KAISHA TOSHIBA, Minato-ku, JP;
Abstract
A creeping discharge element drive device of an embodiment includes a switching element, a current detector, a zero-cross detection circuit, a storage, and a controller. The current detector detects alternating currents flowing through the switching element. The zero-cross point detection circuit detects a zero-cross point of the alternating currents. The storage stores a first threshold value of a resonant period. The controller drives the switching element to apply a test voltage to the creeping discharge element, determines a resonant period of the alternating currents from the detected zero-cross points of the alternating currents, and restricts or stops the driving of the switching element in response to the resonant period exceeding the first threshold value.