Analysis of Eddy Current and Loss of a Novel Canned Switched Reluctance Machine

Yu, Qiang; Wang, Xuesong; Cheng, Yuhu; Tian, Lisi

doi:10.1109/tie.2018.2793262

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…It can be observed that iron loss of proposed I motor increases more rapidly versus speed compared with the conventional and proposed II motors. In addition, the PM eddy current losses of the three motors exhibit similar variation trend, which results from the identical slot‐pole combination, winding layout and motor volume [17–20]. Therefore, the efficiency of the conventional motor is inferior to that of the proposed FM and PSFM motors as shown in Fig.…”

Section: Performance Analysismentioning

confidence: 99%

Design and analysis of a new partitioned stator flux‐modulation motor for direct drive applications

Zhu

Zhao

et al. 2019

IET Electric Power Applications

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In this study, in order to improve the torque density of the conventional permanent magnet (PM) motor, a flux‐modulation (FM) motor employing the magnetic gear effect is proposed. However, the FM motor has space conflict in the finite stator area, which limits the further improvement of torque density. Therefore, a new partitioned stator flux‐modulation (PSFM) motor with separated PM excitation and armature windings is artfully proposed. The main design parameters influence on the average electromagnetic torque in the proposed PSFM motor is investigated, together with the proposed FM motor. Furthermore, based on the optimal designs for the highest average electromagnetic torque in this study, the electromagnetic performances of the three motors, including back‐electromotive force performances, torque characteristics and several other performances with respect to speed are analysed by finite‐element method. Additionally in the PSFM motor, torque generation mechanism and the reduction method of torque ripple are theoretically analysed. Results show that the proposed PSFM motor exhibits 29.1% higher torque density than the FM motor and 87.6% higher than the conventional PM motor with reduced torque ripple and superior loss performance. Finally, the proposed PSFM motor is prototyped for verification.

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Section: Performance Analysismentioning

confidence: 99%

Design and analysis of a new partitioned stator flux‐modulation motor for direct drive applications

Zhu

Zhao

et al. 2019

IET Electric Power Applications

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“…Although such pumps have clear advantages in hazardous applications, they face the challenge of finding a suitable non-magnetic material for the sleeves. Since electrically non-conductive materials such as carbon graphite may not be suitable in certain applications, materials with a low electrical conductivity such as titanium, silicone steel, SUS304, SUS316L, Inconel 718, Hastelloy C, or stainless steel 1.4571 might be used [2][3][4]. Regardless of the type of the machine, the time-varying magnetic flux density in the air gap leads to substantial eddy current losses in electrically conductive sleeves.…”

Section: Introductionmentioning

confidence: 99%

“…These losses can significantly outweigh the copper and iron losses, thereby reducing the efficiency of the machine. Thus, minimizing the eddy current loss in each such sleeve should be the main focus of the design and optimization of every sealless pump [4,5].…”

Section: Introductionmentioning

confidence: 99%

An Alternative Method for Calculating the Eddy Current Loss in the Sleeve of a Sealless Pump

et al. 2021

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A sealless pump, also known as a wet rotor pump or a canned pump, requires a stationary sleeve in the air gap to protect the stator from a medium that flows around the rotor and the pump impeller. Since the sleeve is typically made from a non-magnetic electrically conductive material, the time-varying magnetic flux density in the air gap creates an eddy current loss in the sleeve. Precise assessment of this loss is crucial for the design of the pump. This paper presents a method for calculating the eddy current loss in such sleeves by using only a two-dimensional (2D) finite element method (FEM) solver. The basic idea is to use the similar structure of Ampère’s circuital law and Faraday’s law of induction to solve eddy current problems with a magnetostatic solver. The theoretical background behind the proposed method is explained and applied to the sleeve of a sealless pump. Finally, the results obtained by a 2D FEM approach are verified by three-dimensional FEM transient simulations.

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Control method analysis with high performance and stability for permanent magnet motor based on canned structure

Huang

Jiang

et al. 2022

International Journal of Electrical Power & Energy Systems

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Analysis of Eddy Current and Loss of a Novel Canned Switched Reluctance Machine

Cited by 8 publications

References 20 publications

Design and analysis of a new partitioned stator flux‐modulation motor for direct drive applications

Design and analysis of a new partitioned stator flux‐modulation motor for direct drive applications

An Alternative Method for Calculating the Eddy Current Loss in the Sleeve of a Sealless Pump

Control method analysis with high performance and stability for permanent magnet motor based on canned structure

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