AXIAL FLOW MACHINE FOR A HIGH-VOLTAGE FAN

The spacer element in axial flux machines stabilizes rotor positioning and reduces axial forces, enhancing efficiency and manufacturing simplicity by compensating for manufacturing tolerances and heat-induced issues.

DE102024120301A1Pending Publication Date: 2026-01-22BORGWARNER INC
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Patent Information

Application Number
DE102024120301
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-07-18
Publication Date
2026-01-22

AI Technical Summary

Technical Problem

High-voltage axial flux machines face issues with rotor bending due to axial magnetic forces, which can lead to contact with stators, especially in small gaps, affecting efficiency and requiring precise manufacturing tolerances.

Method used

Incorporation of a spacer element to adjust and maintain uniform axial gaps between the rotor disk and stators, compensating for manufacturing tolerances and reducing axial forces by balancing them, with options for different positioning configurations.

Benefits of technology

Achieves stable axial centering and reduced axial forces, improving efficiency and simplifying manufacturing by allowing less precise component tolerances, while minimizing heat-induced vibrations and stresses.

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Abstract

The present application relates to an axial flux machine (1) for a high-voltage fan (100). The axial flux machine (1) comprises a housing (10), two stators (20), a rotor assembly (30), and a bearing assembly (40). The rotor assembly (30) comprises a shaft (34) and a rotor disk (32) mounted thereon. The bearing assembly (40) rotatably supports the rotor assembly (30) in the housing (10). The rotor assembly (30) is supported at a first axial side (30a) against an axial bearing surface (12a) of the housing (10) via a fixed bearing (42) of the bearing assembly (40). The axial flux machine further comprises a spacer element (50) designed and arranged between the rotor disk (32) and the axial bearing surface (12a) to establish axial gaps (122a, 122b) between the rotor disk (32) and the stators (20).
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Citation Information

Patent Citations

  • Housing-mounted axial flux motor with adjustment function

    DE102021127749A1

  • Rotor for an axial flux motor

    US20240204597A1