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:
Jul. 21, 2009
Filed:
Oct. 29, 2003
Ingolf Groening, Lohr am Main, DE;
Ingolf Groening, Lohr am Main, DE;
Rexroth Indramat GmbH, Lohr am Main, unknown;
Abstract
A rotating A.C. synchronous interior permanent magnet machine with concentrated windings is constructed such that each pole on the secondary-side (rotor) is provided with at least one interior axial slot (), with dimensions h(), h() and d (), with h() being the radial material thickness of the secondary side between the air-gap surface of a slot () and the secondary side air-gap surface, h() being the radial thickness of the secondary side between the inner surface of the secondary side and the inner side surface of the at least one slot and d () being the thickness of the secondary side, whereby the ratio (formula I) lies in the range 0.05-0.35.