Patent · US Active

Electric motor having improved cooling

US12191751B2 · kind B2 · utility

0Cited by

0References

7Claims

0Family size

Assignee

ebm-papst Mulfingen GmbH & Co. KG · DE

Inventors

Jochen Häfner · Blaufelden, DE
Werner Muller · East Greenwich, US
Stephan Nadig · Zweiflingen, DE
Erich Pollok · Rehhof, DE
Gerhard Sturm · Mulfingen, DE
Martin Baun · Mulfingen, DE

Key dates

Filing date	Aug 4, 2022
Grant date	Jan 7, 2025
Priority date	—
Expiry date	Mar 31, 2043

Classification

Technology area (CPC H)Electricity
CPC primaryH02K9/227
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electric motor (1), in particular, an external rotor motor, has a stator (10) with a stator core (11), a non-rotatably attached shaft (20), that extends in the axial direction (A) of the motor, and a rotor bell (30), rotatably arranged relative to the non-rotatable shaft (20). The rotor bell (30) has cooling ribs in an open, spoke-like design rotatably mounted on the shaft (20) by at least one first stator-side bearing shield (31). A cooling device (40) is arranged between and connects the shaft (20) and the stator core (11). The cooling device (40) has a plurality of axial flow openings (41) arranged in the circumferential direction that causes cooling when the motor rotates during operation.

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