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:
May. 17, 2022
Filed:
Jan. 21, 2019
Sanden Automotive Components Corporation, Isesaki, JP;
Masafumi Hotta, Isesaki, JP;
Daisuke Hirono, Isesaki, JP;
Sanden Automotive Components Corporation, Isesaki, JP;
Abstract
Provided is a motor control device having a function for determining a rotor position of a synchronous motor, without use of a sensor, the device prevents obtaining an erroneous rotor position, to enable stable control of the synchronous motor based on the rotor position in both the normal-control region and the flux-weakening-control region. The motor control deviceincludes: a first rotor position determining unitthat determines a rotor position of the synchronous motorbased on a current electrical angle, and a first current phase obtained from a current peak value and a difference between an induced voltage electrical angle and a current electrical angle; a second rotor position determining unitthat determines the rotor position of the synchronous motorbased on the current electrical angle, and a second current phase obtained from a flux linkage and the current peak value; and a selecting unitthat selects the first rotor position determining unitor the second rotor position determining unit, based on the current peak value, and the first current phase or the second current phase.