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. 18, 2004
Filed:
Jan. 23, 2002
Applicant:
Inventor:
Henrik Stiesdal, Brande, DK;
Assignee:
Bonus Energy A/S, Brande, DK;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 9/04 ;
U.S. Cl.
CPC ...
H02P 9/04 ;
Abstract
The invention concerns a method for operating a windmill with variable rpm and a directly network connected primary generator. By this method there disposed a regenerative slip generator between the gear of the windmill and the primary generator, whereby the power coming from the slip may be regenerated to the electric network. The total power output from the windmill is kept constant over a certain range of slip. The invention also concerns the specific design of a windmill with such a slip generator.