AXIAL FLOW MOTOR WITH AN INSULATED ROTOR

A non-conductive segmented cage with retaining ribs and insulating material addresses the structural integrity and eddy current issues in high-torque axial flux motors, enhancing efficiency and performance.

DE102020100528B4Active Publication Date: 2026-06-18GM GLOBAL TECHNOLOGY OPERATIONS LLC
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Patent Information

Application Number
DE102020100528
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2019-05-30
Filing Date
2020-01-13
Publication Date
2026-06-18
Estimated Expiration
2040-01-13

AI Technical Summary

Technical Problem

High-torque axial flux motors face challenges in maintaining structural integrity of the laminated disk while minimizing eddy current losses due to metallic fasteners reacting with magnetic flux, leading to reduced efficiency.

Method used

A non-conductive segmented cage with retaining ribs and a backplate, secured by a snap ring, is used to structurally support the laminated disk, while electrical insulating material is applied between the ribs and notches to reduce eddy currents.

Benefits of technology

The solution enhances structural integrity and reduces eddy current losses, improving the efficiency and performance of high-torque axial flux motors.

✦ Generated by Eureka AI based on patent content.

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Abstract

An axial flux motor (100), comprising: a stator (102); a rotor (104) arranged around an axis of rotation adjacent to the stator (102) and an air gap (106) between them, wherein the rotor (104) comprises: a disk with an inner surface (114) facing the stator (102) and an opposite outer surface (116); a plurality of magnets (122) which are attached in a predetermined arrangement on the inside of the disk; a back plate (138) adjacent to the outer surface (116) of the disk, the back plate (138) comprising a circumferential edge surface (158) defining a plurality of notches (160); and a segmented cage (140) mounted on the inner surface (114), the segmented cage (140) comprising a plurality of retaining ribs (170) designed to hold the magnets (122) in the predetermined arrangement on the inner surface (114) of the disk; wherein the segmented cage (140) interacts with the back plate (138) to structurally support the disk between them, thereby preventing the disk from bending in an axial direction; further comprising a snap ring (142) that fixes the segmented cage (140) to the back plate (138) and presses the back plate (138) onto the outer surface (116) of the disk.
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Citation Information

Patent Citations

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    EP3340436A1

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