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. 21, 2006
Filed:
Jan. 28, 2003
Hansjörg Berroth, Vs-Obereschach, DE;
Hansjörg Berroth, Vs-Obereschach, DE;
EBM-PAPST St. Georgen GmbH & Co. KG, St. Georgen, DE;
Abstract
An improved method of commutating an electronically commutated motor () is disclosed. The motor has a positive () and a negative connecting lead (), a stator having at least one winding phase (), a permanent-magnet rotor (), a rotor-position sensor () for producing a rotor position signal (u, u), and a full bridge circuit (), comprising a pair of Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) coupled to each end of each winding phase (). In order to prevent current shoot-through and prolong the service life of the MOSFETs, without employing a microprocessor, a respective-comparator (') is coupled to the gate of each MOSFET, in order to assure that the MOSFET is switched ON and OFF at an optimum time.