Patent · US Active

Method of making a squirrel cage rotor having reduced radius to accommodate permanent magnets

US9685845B2 · kind B2 · utility

0Cited by

5References

6Claims

0Family size

Assignee

KSB Aktiengesellschaft · DE

Inventors

Gerhard Huth · Stuttgart, DE
Sven Urschel · Eisenberg, DE
Ralf Fischer · Bad Salzdetfurth, DE

Key dates

Filing date	Mar 14, 2014
Grant date	Jun 20, 2017
Priority date	—
Expiry date	Nov 30, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49012
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A rotor (11) with a squirrel cage and permanent magnets (19) mounted on and distributed around the circumference of the rotor, including a core stack extending over the entire rotor region with longitudinally continuous rotor slots extending over the length of the core stack. The squirrel cage is constructed with cage bars disposed, and preferably cast, in the rotor slots; short circuit rings connect the cage bars at both end faces of the core; and the radius of the rotor region is reduced by at least the radial thickness of the magnets. The radius of rotor (11) is reduced over the entire length between short circuit rings (17) such that the radial height of cage bars (15, 29) or cage webs (27) connected thereto is reduced. Also an electric motor or a radial pump having such a rotor, and methods of producing or operating such devices.

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