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. 10, 2002
Filed:
Jun. 08, 2001
Stefan Lukenich, Volkertshausen, DE;
Fritz Schmider, Hornberg, DE;
Papst-Motoren GmbH & Co. KG, St. Georgen, DE;
Abstract
An electronically commutated motor has a rotor and a stator interacting with one another. A semiconductor control member controls a motor current supplied to the stator. An arrangement is provided that detects values of the motor current which surpass a preset threshold value and generates a first signal upon surpassing the threshold value. An arrangement is provided that determines rotational speed values of the motor, which surpass a preset rotational speed, and generates a second signal upon surpassing the preset rotational speed. An arrangement is provided that combines the first and second signals for generating a combined signal, wherein the combined signal acts substantially without temporal delay on the semiconductor control member and reduces the motor current to a value which is greater than zero.