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:
Apr. 15, 2014
Filed:
Jul. 25, 2008
Applicants:
Jan Caroe Aarestrup, Bjerringbro, DK;
Jens Engen Soerensen, Rancho Palos Verdes, CA (US);
Klaus Sloth Jensen, Mariager, DK;
Inventors:
Jan Caroe Aarestrup, Bjerringbro, DK;
Jens Engen Soerensen, Rancho Palos Verdes, CA (US);
Klaus Sloth Jensen, Mariager, DK;
Assignee:
Grundfos Management a/s, Bjerringbro, DK;
Primary Examiner:
Int. Cl.
CPC ...
H02P 27/02 (2006.01); H02P 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The method for activating an asynchronous motor comprising at least two windings is provided, in order, for the purpose of a change in the rotational speed, to connect a first winding and at least one second winding by way of at least two electronic switches. On switching, both switches are opened for one or more time intervals in order to avoid current peaks.