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:
Oct. 22, 2002
Filed:
Sep. 12, 2000
Shigeki Murai, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A motor drive circuit includes a voltage generator configured to form a basic wave for generating sine-wave currents, wherein the voltage generator includes a resistor circuit for generating a plurality of voltages, a timing circuit for sequentially selecting selected ones of the plurality of voltages generated by the resistor circuit, and a switch circuit, connected to the resistor circuit and under control of the timing circuit, for outputting the sequentially selected voltages as the basic wave. A triangular wave generator generates a triangular wave which is applied along with the basic wave generated by the voltage generator to a modulation circuit, and the modulation circuit generates a terminal voltage for generating a sine-wave current.