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. 15, 2018
Filed:
Feb. 13, 2015
Kabushiki Kaisha Toyota Jidoshokki, Kariya-shi, Aichi, JP;
Kiyoshi Uetsuji, Kariya, JP;
Satoshi Umemura, Kariya, JP;
Yoshihiro Maeda, Kariya, JP;
Makio Oshita, Kariya, JP;
Toshihiro Yamamichi, Kariya, JP;
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, Kariya-shi, Aichi, JP;
Abstract
A sensorless electric motor control device is provided that completes a phase detection of a rotor before an activation signal is received, so as to shorten a time period from when the activation signal is received to when the rotor reaches a target number of rotations. The control device for a sensorless electric motorincludes an inverterthat drives the electric motorand a first processorthat serves as a phase detection unit that causes the inverterto perform a phase detection before the inverterreceives an activation signal that activates the electric motor, wherein the phase detection aligns a magnetic pole of a rotor of the electric motorwith a predetermined position with respect to a stator.