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:
Feb. 07, 2006
Filed:
Jul. 20, 2002
Hansjörg Berroth, Villingen-Schwenningen, DE;
Thomas Von Der Heydt, St. Georgen, DE;
Frank Jeske, St. Georgen, DE;
Arnold Kuner, St. Georgen, DE;
Paul Layes, Donaueschingen, DE;
Hans-dieter Schondelmaier, St. Georgen, DE;
Günther Strasser, St. Georgen, DE;
Hansjörg Berroth, Villingen-Schwenningen, DE;
Thomas Von Der Heydt, St. Georgen, DE;
Frank Jeske, St. Georgen, DE;
Arnold Kuner, St. Georgen, DE;
Paul Layes, Donaueschingen, DE;
Hans-Dieter Schondelmaier, St. Georgen, DE;
Günther Strasser, St. Georgen, DE;
ebm-papst St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
A method is disclosed for controlling the commutation in an electronically commutated motor () which comprises a stator having at least one phase (), and a permanent-magnet rotor (), and with which a current limiter () and a controller () for regulating a motor variable are associated. The current limiter () serves to limit the current (I) in the at least one phase () to a setpoint value. The regulation by means of the controller () is accomplished by modifying the distance in time (W) between switching on (t) and switching off (t) of the current (i, i) in the at least one phase. In this method, the setpoint value to which the current limiter limits the current (i, i) in the relevant phase is modifiable. It is modified substantially as a function of a ratio of two times (W/T), namely as a function of the ratio of the distance in time (W) between switching on (t) and switching off (t) of the current (i, i) in the relevant phase () to the time period (T) required by the rotor, at the instantaneous rotation speed, to rotate through a specified rotation angle. A decrease in noise at low rotation speeds is thereby made possible.