Mini review on the design of axial type eddy current braking technology

Waloyo, Hery Tri; Ubaidillah, Ubaidillah; Tjahjana, Dominicus Danardono Dwi Prija; Nizam, Muhammad; Koga, Tomohiro

doi:10.11591/ijpeds.v10.i4.pp2198-2205

Cited by 15 publications

(6 citation statements)

References 34 publications

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“…The magnitude of the eddy currents is influenced by the presence of magnetic fields and electric fields [25][26][27][28][29][30][31][32][33][34][35]:…”

Section: Governing Equationsmentioning

confidence: 99%

Application of Multiple Unipolar Axial Eddy Current Brakes for Lightweight Electric Vehicle Braking

et al. 2020

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The braking system in a vehicle has the main role of slowing down the speed or stopping the moving vehicle. Compared to mechanical braking, which utilizes friction, non-contact braking has several advantages, including longer lifetime and less maintenance. One form of non-contact braking systems is the eddy current brake (ECB), an electric braking system that employs eddy currents to operate. This research focuses on the impact of magnetic field sources used in the ECB. In addition, the number of magnetic field sources is also observed. In order to achieve an ECB design that can be easily applied in any types of vehicles, including motorcycles and compact cars, a compact ECB design with an excellent braking torque is required. In this study, a compact design of the ECB is obtained by distributing the required braking torque from the disc brake into multiple electromagnets. Finite element method-based modeling has been performed to study ECB parameters, including the number of coil winding, the number of electromagnets, and the electric current. The results of this study show that the developed compact ECB could produce 93.66% of the torque required for braking.

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“…The magnitude of the eddy currents is influenced by the presence of magnetic fields and electric fields [25][26][27][28][29][30][31][32][33][34][35]:…”

Section: Governing Equationsmentioning

confidence: 99%

Application of Multiple Unipolar Axial Eddy Current Brakes for Lightweight Electric Vehicle Braking

et al. 2020

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“…The type of ECB discussed in this paper is an axial type with a single magnetic field source, namely, an unipolar axial type of ECB [15,29]. The unipolar axial type of ECB consist of conductor disks and magnetic field sources, with designs and components illustrated in Figure 1.…”

Section: Working Principlementioning

confidence: 99%

A Novel Approach on the Unipolar Axial Type Eddy Current Brake Model Considering the Skin Effect

et al. 2020

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The braking torque mathematical modelling in electromagnetic eddy current brake (ECB) often ignores the skin effect that occurrs during operation. However this phenomenon can not be simply neglected. Therefore, this paper presents a mathematical model of braking torque for a unipolar axial type of ECB system with a non-magnetic disk, which considers the skin effects. The use of mathematical models that consider the existence of skin effects is significant in approaching the braking torque according to the actual condition. The utilization of generic calculations to the model of the ECB braking torque leads to invalid results. Hence, in this paper, the correction factor was added to improve the braking torque calculation as a comparator to the proposed equation. However, the modification and addition of the correction factor were only valid to estimate the low-speed regimes of torque, but very distant for the high-speed condition. From the comparison of calculated values using analytical and 3D modelling, the amount of braking torque at a low speed was found to have an average error for the equation using a correction factor of 1.78 Nm, while after repairing, a value of 1.16 Nm was obtained. For the overall speed, an average error of 14.63 Nm was achieved, while the proposed equation had a small difference of 1.79 Nm. The torque difference from the calculation results of the proposed model with the measurement value in the experiment was 4.9%. Therefore, it can be concluded that the proposed equation provided a better braking torque value approach for both low and high speeds.

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“…PMECCs use an electromagnetic field as the medium of power transmission, and have the characteristics of contactless torque transmission, removal of torque ripple, smooth dynamic process, and adjustable speed, and can be used as couplings, dampers, brakes, and speed governors. Over the past few decades, both academia and industry have witnessed the rapid development of PMECCs, which have been widely used for high-efficiency, adjustable, speed power transmission [1], non-contact braking [2][3][4], vibration absorption and damping [5][6][7][8][9], the removal of cogging torque and torque ripple in wind turbines [10][11][12][13][14][15], automotive variable flow water pumps [16], the torque-speed characteristic measurement of electric motors or vehicles [17,18], and even in vehicles as a mechanical differential [19].…”

Section: Introductionmentioning

confidence: 99%

A Review of Recent Developments in Permanent Magnet Eddy Current Couplers Technology

Wang

et al. 2023

Actuators

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Permanent magnet eddy current couplers (PMECCs) have the characteristics of contactless torque transmission, removal of torque ripple, smooth dynamic process, and adjustable speed, and can be used as couplings, dampers, brakes, and speed governors. Their applications in industry, vehicles, and energy fields are gradually expanding. At the same time, the requirements for the torque density and dynamic performance of PMECCs are increasing. Therefore, a large amount of research work has focused on the fast and accurate modeling, design, and optimization of PMECCs. This paper provides a survey on the development of PMECCs technology. The main topics include the structure and classification of PMECCs, modeling methods, loss and heat transfer analysis modeling, and optimization design. In addition, this paper shows the future trends of PMECCs research. All the highlighted insights and suggestions of this review will hopefully lead to increasing efforts toward the model’s construction and the optimal design of PMECCs for future applications.

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Mini review on the design of axial type eddy current braking technology

Cited by 15 publications

References 34 publications

Application of Multiple Unipolar Axial Eddy Current Brakes for Lightweight Electric Vehicle Braking

Application of Multiple Unipolar Axial Eddy Current Brakes for Lightweight Electric Vehicle Braking

A Novel Approach on the Unipolar Axial Type Eddy Current Brake Model Considering the Skin Effect

A Review of Recent Developments in Permanent Magnet Eddy Current Couplers Technology

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