Analysis of the Thermal Limits of Conventional Eddy Current Brakes based on a Thermal 1d-Model

Holtmann, Christoph and Möckel, Andreas and Rinderknecht, Frank (2022) Analysis of the Thermal Limits of Conventional Eddy Current Brakes based on a Thermal 1d-Model. In: 2nd International Conference on Sustainable Mobility Applications, Renewables and Technology, SMART 2022. IEEE. 2022 Second International Conference on Sustainable Mobility Applications, Renewables and Technology (SMART), 2022-11-23 - 2022-11-25, Online. doi: 10.1109/SMART55236.2022.9990281. ISBN 978-166547146-6.

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Abstract

This article describes the thermal limits of conventional eddy current brakes with an eddy current element with homogeneous material density. Eddy current brakes are wear-free, but have a low power density compared to friction brakes. Most conventional eddy current brakes on the market or in other publications run at a speed of less than 3000 rpm. The objective of this work is to evaluate the maximum speed and theoretical power density of eddy current brakes of the references shown in this work. The maximum speed is limited by the maximum allowable temperature and the maximum allowable load on the rotor due to centrifugal forces. Therefore, the maximum speed and maximum power density are approximated with a transient thermal model after evaluating the maximum speed at 20 degrees Celsius for different applications. Prior to this, the geometry data of the eddy current brakes are evaluated and the torque-speed curves are fitted using a model-based approach to approximate the torque at higher speeds. The highest power density electrically excited eddy current brake studied in this work would have a maximum power density of 4kW/kg and the permanent magnet excited eddy current brake of about 15 kW/kg.

Item URL in elib:

https://elib.dlr.de/192040/

Document Type:

Conference or Workshop Item (Speech)

Title:

Analysis of the Thermal Limits of Conventional Eddy Current Brakes based on a Thermal 1d-Model

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Holtmann, Christoph	UNSPECIFIED	https://orcid.org/0000-0002-1703-7964	140227310
Möckel, Andreas	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Rinderknecht, Frank	UNSPECIFIED	https://orcid.org/0009-0009-9452-1715	UNSPECIFIED

Date:

23 December 2022

Journal or Publication Title:

2nd International Conference on Sustainable Mobility Applications, Renewables and Technology, SMART 2022

Refereed publication:

Yes

Open Access:

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

DOI:

10.1109/SMART55236.2022.9990281

Publisher:

IEEE

ISBN:

978-166547146-6

Status:

Published

Keywords:

Eddy Current Brakes; Power Density; Thermal Model; Benchmark Study

Event Title:

2022 Second International Conference on Sustainable Mobility Applications, Renewables and Technology (SMART)

Event Location:

Online

Event Type:

international Conference

Event Start Date:

23 November 2022

Event End Date:

25 November 2022

Organizer:

Alumni Association of University of Cassino Southern Lazio (ALACLAM – Italy)

HGF - Research field:

Aeronautics, Space and Transport

HGF - Program:

Transport

HGF - Program Themes:

Road Transport

DLR - Research area:

Transport

DLR - Program:

V ST Straßenverkehr

DLR - Research theme (Project):

V - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement

Location:

Stuttgart

Institutes and Institutions:

Institute of Vehicle Concepts

Deposited By:

Holtmann, Christoph

Deposited On:

11 Jan 2023 13:52

Last Modified:

10 Feb 2025 15:19

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Analysis of the Thermal Limits of Conventional Eddy Current Brakes based on a Thermal 1d-Model. (deposited 11 Jan 2023 13:52) [Currently Displayed]

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