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:
Dec. 22, 2015
Filed:
Dec. 03, 2012
Panasonic Corporation, Osaka, JP;
Ryuta Sasaki, Osaka, JP;
Kenichi Kishimoto, Osaka, JP;
Abstract
An electric motor control device includes a current vector controller that follows a target command value for controlling an electric current of the motor by separating the current into a d-axis current and q-axis current orthogonal to each other. The motor control device further includes a driver for driving the motor, a phase-angle generator a phase-angle command generator for generating a phase-angle command β* based on difference Δv* between an absolute value |v*| of a voltage command supplied from the current vector controller to the driver and a given reference value V, a d-axis current command generator for generating d-axis current command id* based on a sine value of the phase-angle command β*, and a q-axis current limiter for setting a limit value of q-axis current command iq* based on a cosine value of the phase-angle command β*. This structure allows canceling a voltage saturation, and driving the motor stably with high output around a voltage saturation region even if a target command value exceeding an output limit of the motor is input.