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:
Aug. 13, 2013
Filed:
Apr. 03, 2009
Benjamin Haas, St. Georgen, DE;
Frank Heller, Königsfeld-Burgberg, DE;
Benjamin Haas, St. Georgen, DE;
Frank Heller, Königsfeld-Burgberg, DE;
EBM-PAPST St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An electronically commutated motor (ECM) has a rotor () and a stator, associated with which is a winding arrangement () to which electrical current (i) is applied to drive the motor (), a computer (), and a PWM generator () associated therewith. The motor () is designed for operation in a parameter range that encompasses at least one variable parameter, e.g. operating voltage or ambient temperature, that can have different values. The computer () is configured to operate by carrying out these steps: After the motor () is switched on and before normal startup begins, during an initial time phase (T), current (i) delivered to the stator winding arrangement () is switched off and on using a pulse duty factor (pwm) derived from said variable parameter, in order to produce startup of the motor (); subsequent to phase (T), when the rotor () is rotating, normal startup is performed.