Patent · US Expired

Electric machine with a damping device

US7078842B2 · kind B2 · utility

4Cited by

10References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Thomas Hoppe · Lemgo, DE
Dietmar Stoiber · Grünwald, DE

Key dates

Filing date	Sep 17, 2004
Grant date	Jul 18, 2006
Priority date	—
Expiry date	Sep 17, 2024

Classification

Technology area (CPC H)Electricity
CPC primaryH02K3/20
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric AC machine with a primary section and a secondary section is disclosed. The primary section has a region facing the secondary section and a region facing away from the secondary section. The region facing the secondary section has windings adapted to receive an AC current. The winding of the primary section has at least one phase conductor which at least partially extends in or on the region of the primary section facing away from the secondary section, thereby producing a magnetic field that extends outside the secondary section. This arrangement can reduce overvoltages and eliminate voltage breakdowns at the star point of winding strands of a synchronous motor.

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