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. 08, 2011
Filed:
Mar. 26, 2007
Arno Karwath, Deisslingen, DE;
Arno Karwath, Deisslingen, DE;
EBM-PAPST St. Beorgen GmbH and Co. KG, St. Beorgen, DE;
Abstract
An improved electric motor has a rotor (), a stator () having at least one phase winding strand (), an output stage () for influencing the current flow in said phase winding strand, a DC link circuit () for supplying the output stage () with current, including a link circuit capacitor (), and a control unit () having an arrangement () for sensing a value characterizing the current recharge into the link circuit capacitor (), which control unit () is configured to specify commutation instants as a function of the sensed value, and to perform commutation operations in the power stage () at the commutation instants thus specified. Avoiding a need for prolonged 'currentless intervals' permits achieving higher efficiency and power output, particularly in a motor having less than three winding phases.