Performance Analysis and Optimization of Liquid-Cooled and Flywheel-Type Eddy Current Retarder

Ye, Lezhi; Liu, Yupeng; Li, Desheng

doi:10.1109/tmag.2019.2894771

Cited by 24 publications

(10 citation statements)

References 9 publications

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“…With the optimized brake, a 40% cost reduction could be achieved compared with the reference eddy current brake. The improvement percentage in the optimized design also is in harmony with the recently published papers about the optimization of ECBs [32][33]. Nearly same reduction on the total mass and increase on braking torque are achieved in those studies.…”

Section: A Fea and Comparisonsupporting

confidence: 82%

Cost Minimization of a Permanent Magnet Eddy Current Brake by Multiobjective Particle Swarm Optimization Based on Nonlinear Reluctance Network Modeling

Güleç¹,

Lindh

Aydın

et al. 2021

IEEE Access

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Section: A Fea and Comparisonsupporting

confidence: 82%

Cost Minimization of a Permanent Magnet Eddy Current Brake by Multiobjective Particle Swarm Optimization Based on Nonlinear Reluctance Network Modeling

Güleç¹,

Lindh

Aydın

et al. 2021

IEEE Access

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“…However, due to the heat dissipation of nanofluid, the braking torque is maintained at about 403 N·m. The heat fade ratio of the proposed retarder's braking torque is only 8.2% under high‐power braking condition, which is lower than that of previous liquid‐cooled retarders reported by Ye et al, Jiao et al, Zhang et al, Guo et al, and Wang et al (see References [2–8]).…”

Section: Methodsmentioning

confidence: 61%

“…For example, Jiao et al 4 proposed a liquid‐cooled ECR with a dual salient poles design. It was noticed that the braking torque decreased by 18.7%, 14.3%, and 6.9% in 10 min corresponding to applied coil voltages of 81.5, 41.7, and 30.9 V. Ye et al designed a water‐cooled permanent magnet retarder (PMR) for heavy vehicles in 2011 5 and a liquid‐cooled and flywheel‐type ECR in 2019 3 . It was reported that the braking torque of the water‐cooled PMR was only reduced by 10% and the temperature reached only 160°C in 5 min, while the heat fade ratio of the liquid‐cooled and flywheel‐type ECR braking torque was only 8.6%.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis of a novel retarder by using the nanofluid cooling system: Numerical and experimental approaches

Xu¹,

Chen

Chen³

et al. 2021

Heat Trans

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To solve the problem of braking torque decline or even brake failure of vehicle retarders caused by high temperature due to long‐time or high‐power braking, the nanofluid with high thermal conductivity is introduced into the previously proposed novel retarder. To evaluate the nanofluid cooling capabilities, a model depicting the vertical fluid flow in the retarder is formulated. Adopting similarity transformations and a shooting method coupled with Runge–Kutta iterative technology, the model boundary value problem is tackled numerically. The cooling capabilities of three typical ethylene glycol (EG)‐based nanofluids: Cu–EG, Al2O3–EG, and TiO2–EG are investigated and compared. Finally, an experimental test is carried out to examine the temperature rise and the variation of braking torque for the retarder. It is demonstrated that Al2O3–EG nanofluid has the highest Nusselt number (rate of heat transfer), and more importantly, the braking torque of the proposed retarder decreases by only 8.2% under high‐power braking condition.

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“…The MEC is a simple analytical calculation method [15,16]. In recent years, it has been applied in the design of eddy current couplings [17] and retarders [18,19]. The authors of [20] use an analytical method to calculate the torque characteristics of a novel hybrid superconducting magnetic coupling with axial flux.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor

Guo

Liu³

et al. 2022

Mathematics

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The use of a magnetic adjustable speed drive is a popular choice in industrial settings due to its efficient operation, vibration isolation, low maintenance, and overload protection. Most conventional magnetic adjustable speed drives use various forms of the permanent magnets (PMs). Due to the PMs, this type of machine has continuous free-wheeling losses in the form of hysteresis and induced eddy currents. In recent years, the homopolar-type rotor has been widely used in high-speed machines, superconducting machines, and in the application of flywheel energy storage. This study proposes a new application of the homopolar-type rotor. A novel adjustable speed drive with a homopolar-type rotor (HTR-ASD), which has obvious advantages (no brush, no permanent magnet, and no mechanical flux regulation device), is designed and analyzed in this study. Its speed and torque can be adjusted only by adjusting the excitation current. Firstly, in this study, the structure, operation principles, and flux-modulated mechanism of the HTR-ASD are studied. The homopolar-type rotor has a special three-dimensional magnetic circuit structure with the same pole. The 3D-FEM is usually used to calculate its parameters, which is time consuming. In this study, an analytical method is developed to solve this issue. To analytically calculate the torque characteristics, the air gap magnetic flux density, and the winding inductance parameter, the equivalent circuit and the air gap permeance are researched to simplify the analysis. Then, the key parameters of the HTR-ASD are calculated. Finally, the performance of the HTR-ASD is comparatively studied using the analytical method and finite element method, and a comparison of the results is carried out. The comparison indicates that the analytical method is in good agreement with simulation results, and that it is very helpful for designing homopolar-type rotor machines. According to the analysis, the proposed adjustable speed drive displays a great performance in relation to the operating characteristics of a flexible mechanical speed drive.

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Performance Analysis and Optimization of Liquid-Cooled and Flywheel-Type Eddy Current Retarder

Cited by 24 publications

References 9 publications

Cost Minimization of a Permanent Magnet Eddy Current Brake by Multiobjective Particle Swarm Optimization Based on Nonlinear Reluctance Network Modeling

Cost Minimization of a Permanent Magnet Eddy Current Brake by Multiobjective Particle Swarm Optimization Based on Nonlinear Reluctance Network Modeling

Thermal analysis of a novel retarder by using the nanofluid cooling system: Numerical and experimental approaches

Analysis and Performance Evaluation of a Novel Adjustable Speed Drive with a Homopolar-Type Rotor

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