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. 07, 2021
Filed:
Nov. 28, 2018
Hitachi Automotive Systems, Ltd., Hitachinaka, JP;
Midori Takaoka, Tokyo, JP;
Junki Isobe, Hitachinaka, JP;
Kohei Myoen, Hitachinaka, JP;
Toshiyuki Ajima, Tokyo, JP;
Kazuaki Tobari, Tokyo, JP;
Yoshitaka Iwaji, Tokyo, JP;
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Abstract
In a motor drive device, a phase compensation amount calculation unitcalculates a phase compensation amount Δθ for compensating a voltage phase θv* when a control mode is switched in a control selection unit. The control selection unitoutputs the three-phase voltage command Vuvw* according to any one of the plurality of control modes based on the modulation factor Kh*, the voltage phase θv*, and the phase compensation amount Δθ. A PWM control unitoutputs gate signals Gun, Gup, Gvn, Gvp, Gwn, and Gwv based on the three-phase voltage command Vuvw* and a rotor position θd. The inverterhas a plurality of switching elements, and controls the plurality of switching elements based on gate signals Gun, Gup, Gvn, Gyp, Gwn, and Gwv to drive the AC motor