Geometry optimization of solid rotor eddy current brake by using sensitivity analysis and 3D finite elements

Tatis, Konstantinos; Kladas, Antonios G.; Tegopoulos, J.A.

doi:10.1016/j.jmatprotec.2004.07.052

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…Professor Feng Yaojing of Hunan University proposed an oil cooling system, combined with the method of fluid simulation to analyze the rotor temperature distribution of the high-power eddy current retarder [9]. Tais et al proposed an optimization method combining finite element and sensitivity analysis to optimize the rotor structure [10]. Liu Yupeng et al proposed a flywheel eddy current retarder with water cooling method, which used computational fluid dynamics method to analyze the hydrothermal coupling field [11].…”

Section: Introductionmentioning

confidence: 99%

Research on Temperature and Braking Performance of Water-Cooled Eddy Current Retarder

et al. 2021

IEEE Access

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Trucks have the problems of frequent braking and long-term braking during long-slope transportation. As the temperature of the traditional eddy current retarder is as high as 500 °C during braking, the braking torque of the retarder is seriously degraded. According to the principle of eddy current braking and current thermal effect, this paper proposes an eddy current retarder in which both the stator and the excitation coil are water-cooled. The multi-field coupling and bidirectional data transmission model of stator temperature field, coil temperature field and transient electromagnetic field are established. The relationship between the braking torque and the working time is analyzed under continuous braking conditions, considering the stator temperature and the temperature of the excitation coil. It provides theoretical support for the optimal design of the retarder. A test prototype of a water-cooled eddy current retarder was manufactured, and a bench drag test was carried out. The calculation results show that the numerical simulation method of coupling between the stator temperature field, the coil temperature field and the transient electromagnetic field is adopted, and the simulation values of the braking torque is in good agreement with the experimental values.INDEX TERMS Braking torque, excitation coil, eddy current retarder, multi-field coupling, water cooling.

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Section: Introductionmentioning

confidence: 99%

Research on Temperature and Braking Performance of Water-Cooled Eddy Current Retarder

et al. 2021

IEEE Access

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“…Permanent magnet eddy current brakes are widely used in a variety of applications thanks to their simple structure, ability to operate with no need for an external electrical supply, and no need for maintenance because of their contactless structure [1]. Eddy current brakes are commonly used as retarders in automotive applications.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective design optimization of a permanent magnet axial flux eddy current brake

Tarvirdilu-Asl¹,

Yüksel²,

Keysan³

2019

Turk J Elec Eng & Comp Sci

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The main aim of this study is to optimize an axial flux eddy current damper to be used in a specific aviation application. Eddy current dampers are more advantageous compared to conventional mechanical dampers as they are maintenance-free due to contactless structure and have higher reliability, which is very desirable in aerospace applications. An initial eddy current brake prototype is manufactured and the test results are used to verify the 3-D finite element simulations. The effect of temperature on the brake performance is investigated. Finally, a multiobjective genetic algorithm optimization is applied to find the optimum pole number and geometric dimensions of the eddy current brake in order to achieve the desired torque-speed characteristic while the total weight of the brake is minimized. It is found that the mass and volume of the initial prototype can be halved by implementing this optimization algorithm.

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“…However, Simeu's model can only express how ECB retards the rotator in low-speed region, but it cannot fully describe the ECB's property in highspeed region for it ignored the eddy current demagnetization. Recently, with the development of computational science, many have tried to model ECB with FEM [10][11][12], although the FEA results could be a reference for engineering design, it is still reasonable to develop current ECB's theoretical model for detecting the influences on ECB's braking torque stability [6][7][8]. Hence, this paper presents a modelling method based on magnetic circle theory, which is easy to find the relations of the internal parameters to the braking torque stabilization.…”

Section: Introductionmentioning

confidence: 99%

Parameter Analysis on Torque Stabilization for the Eddy Current Brake: A Developed Model, Simulation, and Sensitive Analysis

Zhou

Guo

Tan

et al. 2015

Mathematical Problems in Engineering

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Eddy current brake (ECB) is an attractive contactless brake whereas it suffers from braking torque attenuation when the rotating speed increases. To stabilize the ECB's torque generation property, this paper introduces the concept of anti-magneto-motive force to develop the ECB model on the fundamental of magnetic circles. In the developed model, the eddy current demagnetization and the influence of temperature which make the braking torque attenuation are clearly presented. Using the developed model of ECB, the external and internal characteristics of the ECB are simulated through programming by MATLAB. To find the sensibility of the influences on ECB's torque generation stability, the stability indexes are defined and followed by a sensibility analysis on the internal parameters of an ECB. Finally, this paper indicates that (i) the stability of ECB's torque generating property could be enhanced by obtaining the optimal combination of "demagnetization speed point and the nominal maximum braking torque. " (ii) The most remarkable influencing factor on the shifting the demagnetization speed point of ECB was the thickness of the air-gap. (iii) The radius of pole shoe's cross section area and the distance from the pole shoe center to the rotation center are both the most significant influences on the nominal maximum braking torque.

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Geometry optimization of solid rotor eddy current brake by using sensitivity analysis and 3D finite elements

Cited by 10 publications

References 11 publications

Research on Temperature and Braking Performance of Water-Cooled Eddy Current Retarder

Research on Temperature and Braking Performance of Water-Cooled Eddy Current Retarder

Multi-objective design optimization of a permanent magnet axial flux eddy current brake

Parameter Analysis on Torque Stabilization for the Eddy Current Brake: A Developed Model, Simulation, and Sensitive Analysis

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