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:
Oct. 31, 2006
Filed:
Feb. 11, 2003
Martin Eisenhardt, Renningen, DE;
Alexander Seufert, Hammelburg, DE;
Klaus Rechberger, Ludwigsburg, DE;
Martin Eisenhardt, Renningen, DE;
Alexander Seufert, Hammelburg, DE;
Klaus Rechberger, Ludwigsburg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention concerns a method and an apparatus for field-oriented control of a permanent-magnet-excited synchronous machine. Conversion of an ascertained longitudinal voltage component and an ascertained transverse voltage component into triggering pulses for the synchronous machine is accomplished in a low rotation speed range using a pulse-width-modulated inverter, and in a high rotation speed range using a block switching mechanism or a software program functionally corresponding to a block switching mechanism. The invention reduces output oscillations in the upper rotation speed range that occur in known systems as a result of angular inaccuracies with respect to the target voltage zero transition and the voltage zero transition that is actually implemented.