Patent · US Expired

Synchronous turbine type electric motor

US4338537A · kind A · utility

2Cited by

8References

2Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Joachim Eckert · Bad Harzburg, DE
Franz Spirk · Berlin, DE

Key dates

Filing date	Aug 28, 1978
Grant date	Jul 6, 1982
Priority date	—
Expiry date	Aug 28, 1998

Classification

Technology area (CPC H)Electricity
CPC primaryH02K17/20
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A turbine type synchronous motor capable of starting directly and asynchronously when coupled to a work-performing machine is constructed with a drum rotor of high mass, made of solid magnetic material containing iron, and having no damper winding. The field windings, short-circuited or closed through a resistance during starting, are radially disposed in insulated slots which are closed by insulated wedges wherein the insulation is of highly temperature resistant material.

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