Torque Characteristics Analysis of a Novel Hybrid Superconducting Magnetic Coupling With Axial-Flux Using a Magnetic Equivalent Circuit Model

Telezing, Boris Joel Kenne; Chen, Yang; Ombolo, Patrick Djomo; Peng, Zhizhuo; Tai, Jiangxi; Zhu, Li

doi:10.1109/access.2022.3149009

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…There are many improved types of devices using the same operating principle, such as those with linear motion [43][44][45], those using electrical excitation [46][47][48][49] and hybrid excitation [50], and high-temperature superconducting materials that make PMs to enhance magnetic fields [51]. On the conductor rotor side, superconducting materials [48,[52][53][54][55], ferromagnetic materials [56,57], and PMs [58][59][60][61][62][63][64][65] on the conductor disk side are used. These structures are out of the scope of this paper.…”

Section: Permanent Magnet Conductormentioning

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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Section: Permanent Magnet Conductormentioning

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 coupling (PMECC) is an energy transfer device without mechanical contact that can achieve speed regulation of the load equipment by adjusting the air gap length [1][2][3][4]. The permanent magnet rotor in PMECC forms an air gap magnetic field that cuts the moving conductor, which generates induced eddy currents.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the segmented torque calculation will produce errors at the boundary of the segmented interval [23]. Yang proposed a magnet-rotating-type axial magnetic coupling, which changes the air gap length by rotating the angle between the permanent magnet and the conductor rotor to adjust the output torque [4,24]. Kong proposed a flux-tunable permanent magnet eddy current coupler with three permanent magnet rings to further reduce axial space.…”

Section: Introductionmentioning

confidence: 99%

Analytical Analysis of a Novel Flux Adjustable Permanent Magnet Eddy Current Coupling with Double-Sided Conductor

Kong

Wang

Ni³

et al. 2023

Actuators

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The permanent magnet eddy current coupling is widely used in fan and pump equipment as an energy-saving speed control device. The traditional coupling speed adjustment method occupies too much axial space, limiting its application in the process of upgrading old equipment. This paper proposes a novel flux adjustable permanent magnet eddy current coupling with a double-sided conductor to reduce the coupling axial distance while increasing the coupling output torque. The relative angle between the permanent magnet rings is controlled to adjust the output torque, and the double-sided conductor structure is used to improve the output torque. The working principle of the proposed design is illustrated. An analytical model for estimating the regulation performance of the proposed structure is proposed, which introduces the regulated reluctance into the equivalent magnetic circuit method. Based on this model, the expressions for magnetic flux density, eddy current density, and output torque are established. Finally, the accuracy of the analytical model was verified by the 3D finite element method, and the parameter sensitivity analysis was performed. The analysis results show that this device can achieve a relatively large range of output torque regulation under the condition of a fixed air gap, and the output torque is greatly improved by adopting a double-sided conductor structure.

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“…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. The authors of [21,22] attempt to simplify the actual 3D geometric model as a 2D model for research, aiming to increase the efficient of the preliminary design.…”

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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Torque Characteristics Analysis of a Novel Hybrid Superconducting Magnetic Coupling With Axial-Flux Using a Magnetic Equivalent Circuit Model

Cited by 6 publications

References 26 publications

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

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

Analytical Analysis of a Novel Flux Adjustable Permanent Magnet Eddy Current Coupling with Double-Sided Conductor

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

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