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. 31, 2017
Filed:
Nov. 24, 2015
Applicants:
Yingjie Zhang, Iwata, JP;
Junichi Hirata, Iwata, JP;
Inventors:
Yingjie Zhang, Iwata, JP;
Junichi Hirata, Iwata, JP;
Assignee:
NTN CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60L 15/00 (2006.01); B60L 15/20 (2006.01); B60L 3/10 (2006.01); B60L 3/12 (2006.01);
U.S. Cl.
CPC ...
B60L 15/2009 (2013.01); B60L 3/102 (2013.01); B60L 3/106 (2013.01); B60L 3/12 (2013.01); B60L 2220/42 (2013.01); B60L 2220/44 (2013.01); B60L 2240/421 (2013.01); B60L 2240/423 (2013.01); B60L 2260/44 (2013.01); B60L 2270/145 (2013.01); Y02T 10/645 (2013.01); Y02T 10/648 (2013.01); Y02T 10/7275 (2013.01);
Abstract
A slip control device for an electric automobile includes a maximum rotation frequency calculator to calculate a drive wheel maximum rotation frequency Nmax on the basis of a rotation frequency Nof a driven wheel and an ideal slip ratio λmin according to the formula (Nmax−N)/N=λmin. It is determined whether a drive wheel rotation frequency Nexceeds the frequency Nmax. If it is determined that the frequency Nexceeds the frequency Nmax, a torque command value to a motor unit is made to be zero.