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. 27, 2026
Filed:
Jun. 23, 2023
Mitsubishi Electric Corporation, Tokyo, JP;
Tatsuo Nishimura, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A drive device for a rotating electric machine having a stator including a stator winding and a rotor including a permanent magnet includes: a power conversion circuit which outputs a phase current to the stator winding; and a control unit which controls the power conversion circuit. If a phase voltage crest value relative to a voltage of DC power is defined as a modulation factor, the control unit decreases a current amplitude and a current advance angle of the phase current if a temperature of the permanent magnet is higher than a predetermined first threshold-value temperature and the modulation factor is larger than a predetermined threshold value, and increases the current amplitude and the current advance angle of the phase current if the temperature of the permanent magnet is higher than the first threshold-value temperature and the modulation factor is smaller than the threshold value.