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:
Aug. 06, 2002
Filed:
Mar. 30, 2000
Applicant:
Inventors:
Tsuneo J. Kume, Waukegan, IL (US);
Mahesh M. Swamy, Waukegan, IL (US);
Assignee:
Yaskawa Electric America, Inc., Waukegan, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
H02P 5/00 ;
U.S. Cl.
CPC ...
H02P 5/00 ;
Abstract
A control for an induction motor operated by a variable frequency drive (VFD) includes a control unit adapted to control the VFD in a normal mode or a stopping mode. The normal mode comprises controlling the VFD at a select commanded operating frequency to control speed of the induction motor. The stopping mode comprises controlling the VFD at a substantially lower commanded operating frequency to operate the induction motor at a high negative slip condition to rapidly stop rotation of the induction motor.