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:
Mar. 18, 2003
Filed:
Sep. 28, 2000
Applicant:
Inventor:
Rainer Fey, Schweinfurt, DE;
Assignee:
SRAM Deutschland GmbH, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K 6/04 ; B60K 4/102 ;
U.S. Cl.
CPC ...
B60K 6/04 ; B60K 4/102 ;
Abstract
A drive unit for electrically-operated vehicles. Two electromotors which can be electrically switched in series or in parallel, optionally, are used in the drive unit in order to obtain a high degree of efficiency and a high degree of overload protection for the batteries. The motors can also be controlled with pulse width modulation by means of an electronic control unit, which enables the current load of the batteries to be kept within stipulated limits. Other advantages of the invention lie in the better use that is made of the construction space, the lower production costs and the use of economical construction materials.