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. 02, 1994
Filed:
Aug. 28, 1992
Bjorn Lind, Billdal, SE;
W. Schlafhorst AG & Co., Monchengladbach, DE;
Abstract
Method and a device in a drive system for a DC-motor including an inverter and a multiple phase synchronous motor with a permanent magnet rotor, and provided with a rotor position detection means in order to generate a rotation dependent logical position signal or signals. An optimization is carried out, which is based on the rotation dependent logical signals (POS1, POS2, POS3) from said rotor position detection means whereby the commutation points each are displaced such, that at said optimization minimum input current is detected to eliminate poor operation caused by unsymmetries in the motor iron or windings as well as unsymmetries of the rotor magnet and thereby optimize motor performance with respect to e.g. efficiency at present velocity and load, maximum acceleration and motor vibrations.