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:
Nov. 24, 2020
Filed:
Dec. 08, 2017
Nidec Corporation, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A motor control apparatus includes a first circuit that determines a d-axis 0th-order current and a q-axis 0th-order current, a second circuit that determines a d-axis 6th-order harmonic current and a q-axis 6th-order harmonic current according to a position of the rotor, and a third circuit that determines, respectively, a value obtained by superposing the d-axis 6th-order harmonic current on the d-axis 0th-order current and a value obtained by superposing the q-axis 6th-order harmonic current on the q-axis 0th-order current as a d-axis current command value and a q-axis current command value. An amplitude iand a phase θof the d-axis 6th-order harmonic current and an amplitude iand a phase θof the q-axis 6th-order harmonic current have values that decrease an electrical angle 6th-order radial force as compared with a case in which both of the amplitude iand the amplitude iare zero and decrease an electrical angle 8th-order radial force as compared with a case in which the amplitudes iand iand the phases θand θare values that minimize the electrical angle 6th-order radial force.