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:
Nov. 08, 2011
Filed:
Jun. 15, 2009
Arno Karwath, Deisslingen, DE;
Elvis Nocita, Schramberg, DE;
Arno Karwath, Deisslingen, DE;
Elvis Nocita, Schramberg, DE;
EBM-Papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An electric motor has a DC link circuit (), a permanent-magnet rotor (), and a control circuit having a full bridge (). A program-controlled calculation arrangement () is configured to supply the semiconductor switches of a first bridge half with a PWM signal (') and to supply the semiconductor switches () of the second bridge half with a commutation signal (O, O′). An energy storage device () is provided which, during normal operation of the motor (), is chargeable from the DC link circuit () and serves, upon cessation of the signals from the calculation arrangement (), to make the semiconductor switches () of the other bridge half conductive, and thereby to short-circuit the stator winding arrangement () through those semiconductor switches () in order to decelerate the permanent-magnet rotor () and to thereby minimize risk of human injury.