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:
Sep. 30, 2003
Filed:
Jul. 17, 2002
Applicant:
Inventors:
Henrik Stendahl, Seattle, WA (US);
Göran Göransson, Kävlinge, SE;
Johan Bengtsson, Göteborg, SE;
Assignee:
Emotron AB, Helsingborg, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 7/05 ;
U.S. Cl.
CPC ...
H02P 7/05 ;
Abstract
A control circuit for a reluctance machine having two mutually movable parts and at least one inductive phase winding adapted for a certain maximum drive current value. The method includes detecting when a phase winding is in a non-drive mode; causing a test current, having a second maximum value lower than said certain maximum value, to flow through the phase winding and through a current sensor when the winding is in the non-drive mode; and establishing a mutual position in dependence of the output of said current sensor.