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:
Apr. 02, 2019
Filed:
May. 19, 2016
Denso Corporation, Kariya, Aichi-pref., JP;
Koji Sakai, Kariya, JP;
Akitomo Yamanaka, Kariya, JP;
DENSO CORPORATION, Kariya, Aichi-pref., JP;
Abstract
A motor driving device for a motor having a stator and a rotor rotationally driven by an input of an AC voltage includes: an inverter circuit having multiple units corresponding to multiple phases respectively, each unit having a pair of a switching element and a reflux diode connected in anti-parallel to the switching element; and a control device controlling the inverter circuit to convert a DC voltage into the AC voltage and to output the AC voltage to the stator coil. The control device includes: a field weakening control unit adjusting the AC voltage to control a magnetic field of the stator coil to weaken a field magnetic flux of the rotor; and a regenerative current control unit switching an anti-regenerative side switching element to flow a regenerative current when the AC voltage stops while the field weakening control unit performs the field weakening control.