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. 31, 2015
Filed:
Jan. 25, 2013
Adrian Huwiler, Honau, CH;
Ladislav Kucera, Thalwil, CH;
Daniel Schoop, Zug, CH;
Martin Zurfluh, Altdorf UR, CH;
Adrian Huwiler, Honau, CH;
Ladislav Kucera, Thalwil, CH;
Daniel Schoop, Zug, CH;
Martin Zurfluh, Altdorf UR, CH;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
During displacement of an actuating element to a target position, a brushless direct-current motor is driven by a driving commutation pattern derived from rotor position signals. After the target position is reached the brushless direct-current motor is transferred to a holding mode in which it is driven by a commutation pattern providing a required holding torque. In the holding mode the holding current necessary for providing the required holding torque is minimized by an iterative holding current reduction method to a holding current value guaranteeing the required holding torque.