Patent · US Active

Primary part and linear electrical machine with force ripple compensation

US7893569B2 · kind B2 · utility

7Cited by

2References

17Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Zeljko Jajtic · Birkenfeld, DE
Gerhard Matscheko · Starnberg, DE
Christian Volmert · Munich, DE

Key dates

Filing date	Feb 18, 2009
Grant date	Feb 22, 2011
Priority date	—
Expiry date	Feb 18, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH02K2213/03
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A linear electric motor including a primary part having a flux guiding element on the end faces of the primary part, a three-phase winding on the primary part that produces a first magnetic field and a permanent magnet on each end face that produces a second magnetic field that is superimposed on the first field to reduce force ripple is disclosed. The primary part has tooth modules and also end-tooth modules. The end-tooth modules have no winding, are located on the end face, and are smaller in volume than and shaped differently from the tooth modules. The primary part is separated from a secondary part by an air gap, and the end-tooth modules are separated from the secondary part by an additional air gap.

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