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. 13, 2015
Filed:
Nov. 28, 2011
Detlef Potoradi, Bad Neustand/Saale, DE;
Rolf Vollmer, Gersfeld, DE;
Dirk Van Riesen, Tauberbischofsheim, DE;
Detlef Potoradi, Bad Neustand/Saale, DE;
Rolf Vollmer, Gersfeld, DE;
Dirk Van Riesen, Tauberbischofsheim, DE;
SIEMENS AKTIENGESELLSCHAFT, München, DE;
Abstract
The aim of the invention is to provide an electric motor which has a high torque at low rotation speeds and a high power at high rotation speeds. The invention therefore proposes an electric motor with permanent-magnet excitation having a first active part (), which is fitted with permanent magnets (), and a second active part (), which can be moved in relation to the first active part () by magnetic force of the permanent magnets (). The electric motor also has a heating device () with which the magnetic field of at least one of the permanent magnets () can be weakened by heating the permanent magnets as a function of a speed of the first active part () in relation to the second active part ().