Rotor Design for High-Speed High-Power Permanent-Magnet Synchronous Machines

Fang, Haiyang; Qu, Ronghai; Li, Jian; Zheng, Pei; Fan, Xinggang

doi:10.1109/tia.2017.2684090

Cited by 84 publications

(41 citation statements)

References 18 publications

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“…The PMs are glued to the rotor shaft and retained by a sleeve made of nonmagnetic material against the centrifugal forces [14]. The selected material for the rotor sleeve is Titanium Ti6A14V designed with a thickness of 0.4 mm, to reduce the moment of inertia and increase the airgap width.…”

Section: Machine Design and Considerationsmentioning

confidence: 99%

Design and Losses Analysis of a High Power Density Machine for Flooded Pump Applications

Al-Timimy

Giangrande

Degano

et al. 2018

IEEE Trans. on Ind. Applicat.

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Abstract-This paper describes the design process of a 10 kW 19000 rpm high power density surface mounted permanent magnet synchronous machine for a directly coupled pump application. In order to meet the required specifications, a compact machine, with cooling channels inside the slots and flooded airgap, has been designed through finite element optimization. For high power density, high speed machines, an accurate evaluation of the power losses and the electromechanical performance is always extremely challenging. In this case, the completely flooded application adds to the general complexity. Therefore this paper deals with a detailed losses analysis (copper, core, eddy current and mechanical losses) considering several operating conditions. The experimental measurements of AC copper losses as well as the material properties (BH curve and specific core losses), including the manufacturing process effect on the stator core, are presented. Accurate 3D finite element models and computational fluid dynamics analysis have been used to determine the eddy current losses in the rotor and windage losses respectively. Based on these detailed analysis, the no load and full load performance are evaluated. The experimental results, on the manufactured prototype, are finally presented to validate the machine design.Index Terms-High power density, high speed, losses calculation, performance analysis, permanent magnet motors.

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Section: Machine Design and Considerationsmentioning

confidence: 99%

Design and Losses Analysis of a High Power Density Machine for Flooded Pump Applications

Al-Timimy

Giangrande

Degano

et al. 2018

IEEE Trans. on Ind. Applicat.

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“…Thus, specific design considerations are required, such as electromagnetic performance, rotor structure strength, and temperature constraints. The literature presents integrated design methods for high‐speed machines considering the electromagnetic, mechanical, and thermal issues . However, because of the hightemperature, the position sensor cannot work normally for high‐speed machines.…”

Section: Introductionmentioning

confidence: 99%

Integrated design of high‐speed permanent‐magnet machines considering sensorless operation

Wang

Zhang

2018

IEEJ Transactions Elec Engng

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Sensorless operation can significantly improve the reliability of the high-speed permanent-magnet (HSPM) machines. Thus, from the point of view of the whole system, it is necessary to consider sensorless control at the design stage for the HSPM brushless DC machines. In this paper, an integrated design is presented for sensorless control using the third-harmonic back-Electromagnetive force (EMF). Finite element (FE) method is used to integrally design the machine considering electromagnetism, temperature, and rotor structure strength, and the optimum rotor and stator structures are determined to obtain sufficient third-harmonic back-EMF for sensorless control. Simultaneously, the temperature distribution and rotor structure strength are predicted by the FE method. Finally, a prototype is fabricated and the experimental system is built to verify the machine structure, design method, and sensorless control strategy.The machine structure is shown in Fig. 1. The design of HSPM machines involves continuous iterations of electromagnetic properties, temperature, and rotor structure strength. Meanwhile, the sensorless control using third-harmonic back-EMF is considered during the integrated design process. The flowchart of integrated design for HSPM machines is shown in Fig. 2. The aim of integrated design is to gain balance of all properties of HSPM machines. Machine Topologies Considering Third-Harmonic for Sensorless OperationThe amplitude of the third-harmonic back-EMF is important to realize sensorless control of a high-speed machine, and the amplitude of fundamental back-EMF should meet the requirement of the designed machine. The fundamental equations related to back-EMF are developed in this section.

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“…For this purpose, a more detailed technique to estimate iron losses taking into account the effects of harmonics and rotational magnetic flux is proposed. Also, [10] proposes an integrated mechanical-EM design procedure for high-speed SPM synchronous machines in order to get the sleeve thickness, the PM thickness, the shaft diameter, and the interference fit between the PMs and the sleeve. In particular, three high-strength materials for the sleeve are considered and their performances are compared.…”

Section: Introductionmentioning

confidence: 99%

Design Procedure for High-Speed PM Motors Aided by Optimization Algorithms

et al. 2018

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This paper considers the electromagnetic and structural co-design of superficial permanent magnet synchronous machines for high-speed applications, with the aid of a Pareto optimization procedure. The aim of this work is to present a design procedure for the afore-mentioned machines that relies on the combined used of optimization algorithms and finite element analysis. The proposed approach allows easy analysis of the results and a lowering of the computational burden. The proposed design method is presented through a practical example starting from the specifications of an aeronautical actuator. The design procedure is based on static finite element simulations for electromagnetic analysis and on analytical formulas for structural design. The final results are validated through detailed transient finite element analysis to verify both electromagnetic and structural performance. The step-by-step presentation of the proposed design methodology allows the reader to easily adapt it to different specifications. Finally, a comparison between a distributed-winding (24 slots) and a concentrated-winding (6 slots) machine is presented demonstrating the advantages of the former winding arrangement for high-speed applications.

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Rotor Design for High-Speed High-Power Permanent-Magnet Synchronous Machines

Cited by 84 publications

References 18 publications

Design and Losses Analysis of a High Power Density Machine for Flooded Pump Applications

Design and Losses Analysis of a High Power Density Machine for Flooded Pump Applications

Integrated design of high‐speed permanent‐magnet machines considering sensorless operation

Design Procedure for High-Speed PM Motors Aided by Optimization Algorithms

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