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:
Jan. 21, 2014
Filed:
Feb. 10, 2010
Hisaaki Watanabe, Kanagawa, JP;
Hisaaki Watanabe, Kanagawa, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
A motor speed determining circuit determining a rotation speed of a motor is provided and a processing of generating motor driving waveform is switched in accordance with the rotation speed of the motor. A resolver signal outputted from a resolveris converted to a digital value by an R/D converter, and inputted to a computing circuit of resolver value correctionvia an R/D conversion interface. A current value of a motor M is converted to a digital value by an A/D convertor. The computing circuit of resolver value correctioncomputes a resolver correction value of the inputted digital signal and calculates positional data from a corrected resolver value. The computing circuit of motor control computes a current instruction value from a motor current value subjected to digital conversion by the A/D converterand a motor current instruction value etc., and a motor waveform output circuitgenerates a motor driving waveform from the current instruction value and outputs the same to a power module PM.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile