Patent · US Expired

Three-phase synchronous machine having a permanent magnet rotor with an induction cage

US7564158B2 · kind B2 · utility

18Cited by

6References

14Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Gerhard Huth · Stuttgart, DE
Rolf Vollmer · Gersfeld, DE

Key dates

Filing date	Sep 11, 2003
Grant date	Jul 21, 2009
Priority date	—
Expiry date	Oct 29, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH02K21/46
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The aim of the invention is to achieve a high torque yield in synchronous machines excited by permanent magnets. Said aim is achieved by using subharmonic air gap fields. The rotor comprises an induction cage as well as permanent magnets. The number of winding holes of the stator is greater than q=0.5. The number of poles of the rotor is greater than the base number of poles of the air gap field produced by the windings.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.