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:
Feb. 21, 1989
Filed:
Feb. 26, 1988
Michika Uesugi, Fuji, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An apparatus for controlling a PWM controlled inverter adapted to effect the waveform control of the inverter output voltage in accordance with the memory content of ROM in which instantaneous output voltage data are memorized. This control apparatus comprises a ROM in which the instantaneous output voltage outputs thereof in the PWM control are memorized, and in which the number of addresses within a predetermined electrical angle section is set to a fixed value irrespective of the number of switching times within the electrical angle section, an electrical angle counter in which duration corresponding to the duration time data read from the ROM is set, an address counter responding to the count-up of the electrical angle counter to advance the read address of the ROM, and a controller for controlling the output voltage of the inverter in accordance with an instantaneous output voltage corresponding to the instantaneous output voltage data read from the ROM.