Patent · US Expired

Permanent magnet excited rotor for a permanent magnet excited electric drive, particularly for AC main drives

US6664690B2 · kind B2 · utility

2Cited by

16References

15Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventor

Gerhard Huth · Stuttgart, DE

Key dates

Filing date	Aug 23, 2001
Grant date	Dec 16, 2003
Priority date	—
Expiry date	Aug 23, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH02K1/278
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

For achieving a constant capacity range by way of field weakening of a permanent magnet excited drive the magnetic transverse resistance (Rm) of the rotor plate pack is increased by pole gaps (P1, P2), which are produced by milling into the upper surface (O) of the rotor plate section (L), or are punched into the rotor plate section (L), whereby a covering of the poles of Tp in the range of from 70% to 80% has been shown to be particularly advantageous.

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