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:
Sep. 11, 2018
Filed:
Nov. 28, 2013
Mitsubishi Electric Corporation, Tokyo, JP;
Kotaro Matsuda, Tokyo, JP;
Hisanori Yamasaki, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-Ku, Tokyo, JP;
Abstract
To generate a PWM signal, as an on/off signal of a semiconductor switch that constitutes a power conversion main circuit, by comparing a modulation wave command based on an input voltage waveform command of the power conversion main circuit with a carrier wave having changes from a lower limit to an upper limit and from the upper limit to the lower limit for an integral number of times per one cycle of an AC power supply, where the carrier wave has characteristics such that one change time from the lower limit to the upper limit and then returning to the lower limit is constant, and a time ratio between a change time from the lower limit to the upper limit and a change time from the upper limit to the lower limit changes periodically.