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:
Sep. 12, 2017
Filed:
Aug. 09, 2012
Yoshinori Yamashita, Chiyoda-ku, JP;
Sho Kato, Chiyoda-ku, JP;
Hisanori Yamasaki, Chiyoda-ku, JP;
Ryo Yokozutsumi, Tokyo, JP;
Yuruki Okada, Chiyoda-ku, JP;
Yoshinori Yamashita, Chiyoda-ku, JP;
Sho Kato, Chiyoda-ku, JP;
Hisanori Yamasaki, Chiyoda-ku, JP;
Ryo Yokozutsumi, Tokyo, JP;
Yuruki Okada, Chiyoda-ku, JP;
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-Ku, Tokyo, JP;
Abstract
A resistance calculation activator determines whether or not an electric car is stopped on the basis of a drive command signal and an external signal, and activates a resistance calculator if a powering command is input as the drive command when it is determined that the electric car is stopped. The activated resistance calculator computes, within a resistance calculation period, a resistance value of an AC motor that produces driving force for the electric car, on the basis of a d-axis voltage command value and a d-axis current value supplied to the AC motor.