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. 06, 1986
Filed:
Jan. 17, 1985
Kazumi Kouyama, Otsu, JP;
Takashi Deguchi, Kusatsu, JP;
Masahiro Kadono, Kusatsu, JP;
Shigeki Harada, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
In a controlling apparatus for a simulated sinusoidal wave of unequal width PWM inverter, wherein PWM signal comprises a data region and a HALT region in each of carrier period timer, the carrier period timer T.sub.0 and data unit timer T.sub.2 are controlled by each other independent digital values by each other independent microcomputers (5, 6) or by use of each other different timers (10, 11), and the data unit timer T.sub.2 is controlled by an output of a power source voltage fluctuation detector (18), thereby to provide a constant voltage-frequency characteristic even at voltage fluctuation.