Patent · US Expired

Air-cooled rotor for electric motor

US4800315A · kind A · utility

31Cited by

5References

10Claims

0Family size

Assignee

Metabowerke GmbH · DE

Inventors

Manfred Schulz · Jeffery Road, DE
Alfred Wagemann · Jeffery Road, DE
Gerhard Waldner · Hirschhorn, DE

Key dates

Filing date	Sep 17, 1987
Grant date	Jan 24, 1989
Priority date	—
Expiry date	Sep 17, 2007

Classification

Technology area (CPC H)Electricity
CPC primaryH02K9/06
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric motor has a ferrous core extending along, rotatable about, and centered on an axis. This core is formed with axial slots and has opposite end edges centered on the axis. A winding extends along the slots of the core and has opposite axial ends extending axially beyond the core. A fan on the core circulates air axially over the core and winding. Respective deflector cages on the winding ends each include an inner ring, an outer ring fitted over the respective end edge of the core, and a plurality of ribs extending axially and radially between the rings and projecting generally axially from the respective winding end. The ribs are spaced apart on the respective winding end such that the winding end is exposed between the ribs. Thus on rotation of the rotor, particles blown by the fan are deflected by the ribs before they engage the winding ends.

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