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. 13, 1982
Filed:
Jan. 05, 1981
Kenichi Otsuka, Kodaira, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A voltage source inverter has a main circuit with a switching device to which is connected a DC power source through a load, and a control circuit for controlling the on-off operation of the switching device. The control circuit includes a function generator for outputting a first signal representative of the voltage-time-integration value in correspondence with the phase of the load voltage, a time counter for outputting a second signal representative of total time of the integrated time of the period during which the DC voltage is applied to the load, and a comparator for comparing the first signal with the second signal. The output of the comparator controls the on-off operation of the switching device through a logic circuit and supplies a pulse-width-modulated AC voltage to the load.