Comparison of Eddy Current Coupling Topologies for High Efficiency Mechanical Power Transmission

Al-Shammari, Saud J.; Lazari, Panagiotis; Atallah, K.

doi:10.1109/tec.2022.3217347

Cited by 3 publications

(4 citation statements)

References 20 publications

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“…The translation of a large and high-speed rotors has higher requirements for a complicated mechanical design of MOD. The MOD will occupy more axial space, and reduce the reliability of the devices [67]. Therefore, the application of hybrid excitation and mechanical flux adjustment methods in the field of traditional speed regulation technology for energy conservation based on PMASD will generate great academic research and industrial application value.…”

Section: New Speed Regulating Scheme For Pmasdsmentioning

confidence: 99%

Review and Recent Developments of Speed Regulation Technology for Energy Conservation Based on Permanent Magnet Adjustable Speed Drive

Li,

Wang,

Jiang

et al. 2024

IEEE Access

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The speed regulation technology for energy conservation of pump and fan systems occupies an important position in industrial field. The paper focuses on the rapid development and research significance of speed regulation technology for energy conservation based on different permanent magnet adjustable speed drives (PMASDs). The development history and speed regulation scheme for energy conservation are introduced step by step. The features of theoretical model based on magnetic vector potential and equivalent magnetic circuit methods are presented and studied in the paper, which is benefit to select a suitable method for a specific drive. Several optimization methods of design parameters of PMASDs are given in the paper. The structure and operating principle of some new speed regulation scheme are described, and their advantages, disadvantages and feasibility of engineering application are analyzed. Finally, the proposed speed regulation technologies for energy conservation are summarized and classified from the aspects of magnetic circuit structure, permanent magnet rotor structure, conductor rotor structure, and the slip power conversion scheme. In a conclusion, the power-fed PMASD will be the future of energy conservation technology for the high-efficiency and low-cost large pump and fan systems.INDEX TERMS Adjustable speed drive, energy conservation, equivalent magnetic circuit, magnetic vector potential, mechanical flux adjustment, optimization method, permanent magnet, power-fed.

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Section: New Speed Regulating Scheme For Pmasdsmentioning

confidence: 99%

Review and Recent Developments of Speed Regulation Technology for Energy Conservation Based on Permanent Magnet Adjustable Speed Drive

Li,

Wang,

Jiang

et al. 2024

IEEE Access

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“…According to the mounting method of PMs, there are also surface-mounted and surface-inset types. Reference [1] conducted a comparative study on PMECCs with different topological structures. On the basis of these basic structures, some new and improved structures have been developed by optimizing the design of the conductor disk for slotting or grooving, PM shape, or magnetization direction, as described below.…”

Section: Working Principle Structure and Classification Of Pmeccsmentioning

confidence: 99%

“…Because the temperature will change the permeability µ and resistance R of the material of the PMECCs, the permeability at different temperatures is shown in Figure 19. The letters from A to F indicate the moving trace of PM working points when the Nd-Fe-B 50M is working at exceeding t w = 100 • C. When the temperature is higher, the demagnetization of permanent magnets will also occur; therefore, the equation for the change in resistance with temperature can be expressed by Equation (1).…”

Section: Multi-field Coupling Analysismentioning

confidence: 99%

“…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%

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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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3D electromagnetic analytical model for radial-flux eddy-current couplers

Messadi,

Hadjout,

Takorabet

2024

COMPEL

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Purpose This paper aims to develop a new 3D analytical model in cylindrical coordinates to study radial flux eddy current couplers (RFECC) while considering the magnetic edge and 3D curvature effects, and the field reaction due to the induced currents. Design/methodology/approach The analytical model is developed by combining two formulations. A magnetic scalar potential formulation in the air and the magnets regions and a current density formulation in the conductive region. The magnetic field and eddy currents expressions are obtained by solving the 3D Maxwell equations in 3D cylindrical coordinates with the variable separation method. The torque expression is derived from the field solution using the Maxwell stress tensor. In addition to 3D magnetic edge effects, the proposed model takes into account the reaction field effect due to the induced currents in the conducting part. To show the accuracy of the developed 3D analytical model, its results are compared to those from the 3D finite element simulation. Findings The obtained results prove the accuracy of the new developed 3D analytical model. The comparison of the 3D analytical model with the 2D simulation proves the strong magnetic edge effects impact (in the axial direction) in these devices which must be considered in the modelling. The new analytical model allows the magnetic edge effects consideration without any correction factor and also presents a good compromise between precision and computation time. Practical implications The proposed 3D analytical model presents a considerably reduced computation time compared to 3D finite element simulation which makes it efficient as an accurate design and optimization tool for radial flux eddy current devices. Originality/value A new analytical model in 3D cylindrical coordinates has been developed to find the electromagnetic torque in radial flux eddy current couplers. This model considers the magnetic edge effects, the 3D curvature effects and the field reaction (without correction factors) while improving the computation time.

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Comparison of Eddy Current Coupling Topologies for High Efficiency Mechanical Power Transmission

Cited by 3 publications

References 20 publications

Review and Recent Developments of Speed Regulation Technology for Energy Conservation Based on Permanent Magnet Adjustable Speed Drive

Review and Recent Developments of Speed Regulation Technology for Energy Conservation Based on Permanent Magnet Adjustable Speed Drive

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

3D electromagnetic analytical model for radial-flux eddy-current couplers

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