Brake device

The braking device with radial magnetic flux and integrated friction mechanism addresses power density and manufacturing issues in eddy current brakes, enabling efficient stopping and improved thermal management.

DE102023130683B4Active Publication Date: 2026-07-02DEUTSCHES ZENTRUM FÜR LUFT UND RAUMFAHRT E V
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
DEUTSCHES ZENTRUM FÜR LUFT UND RAUMFAHRT E V
Filing Date
2023-11-06
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing eddy current brakes face limitations such as reduced power density at high speeds, complex manufacturing, and the need for additional mechanisms to bring the vehicle to a complete stop, due to axial flux designs and material constraints.

Method used

The proposed braking device incorporates a stator and rotor arrangement with radial magnetic flux guidance and an integrated friction brake, utilizing a spring preload and friction elements to generate additional torque, allowing the system to come to a standstill, and features a porous conductive structure for improved heat management and manufacturing efficiency.

Benefits of technology

The solution enhances power density, simplifies manufacturing, and ensures the braking device can effectively bring a vehicle to a complete stop, while reducing thermal stress and assembly complexity.

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Abstract

Braking device (100), in particular eddy current braking device, comprising at least a stator part (10), a rotor part (50) rotatably arranged relative to the stator part (10) about an axis of rotation (12), with a shaft (52) arranged in the axis of rotation (12), wherein the rotor part (50) and the stator part (10) are arranged concentrically to each other with an air gap (14) between them, wherein the stator part (10) comprises an induction device (20) configured for inducing eddy currents by a magnetic field, wherein the rotor part (50) comprises an excitation device (60) configured for generating a primary magnetic field (54) directed in the radial direction (16), wherein the induction device (20) is configured to generate a primary magnetic field (54) directed in the radial direction (16) at least partially opposite to the primary magnetic field (54) as a result of a rotation of the rotor part (50) about the axis of rotation (12). directed secondary magnetic field (56) is formed,wherein the rotor part (50) is axially displaceable on the shaft (52) against a spring preload, wherein the induction device (20) and the excitation device (60) have at least partially, in particular conical, inclined regions (88, 90) in the area of ​​the air gap (14), wherein at least one friction element (78, 82) is arranged between the rotor part (50) and the stator part (10), which is in operative contact with the rotor part (50) and / or the stator part (10) when the rotor part (50) is axially displaced against the spring preload, wherein the induction device (20) comprises a substantially annular base body (22) with a plurality of pole elements (24) directed radially to the rotor part (50) and an electrically conductive element (30) which at least partially encloses the pole elements (24).
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