Comparison of the Performance of Different Asynchronous Solid-Rotor Constructions in a Megawatt-Range High-Speed Induction Motor

Kurvinen, Emil; Di, Chong; Petrov, Ilya; Jastrzębski, Rafał P.; Kepsu, Daria; Pyrhönen, Juha

doi:10.1109/iemdc.2019.8785288

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…Different induction rotor active part designs were conducted [6]. According to preliminary analysis, machine dimensions were selected so that the rotor surface rated speed is 167 m/s, which locates the machine in the lower end of HS machinery leaving a margin for higher speeds.…”

Section: A Mechanial Design Of the Rotormentioning

confidence: 99%

“…An induction motor can have different topologies based on mechanical structure, having a tradeoff between the ease of manufacturability and efficiency. However, in megawatt range the tradeoff is not very significant [6]. Establishing a systematic design process for a HS induction machine allows accomplishment of more tailored designs and eventually This work is licensed under a Creative Commons Attribution 4.0 License.…”

Section: Introductionmentioning

confidence: 99%

“…This combined with the high operating temperature (up to 200 • C) creates true manufacturing challenges. As reported in [6], there are different options for rotor constructions; a solid steel rotor with complete squirrel cage copper winding, slitted solid rotor with copper end rings, or a slitted steel rotor without any other features. In addition, a modular bearing design structure requires extra rotor length and thus reduces the critical speeds.…”

Section: Introductionmentioning

confidence: 99%

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Design and Manufacturing of a Modular Low-Voltage Multimegawatt High-Speed Solid-Rotor Induction Motor

Kurvinen

Petrov

et al. 2021

IEEE Trans. on Ind. Applicat.

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High-speed solid-rotor induction machines (HSIMs) are popular within high-speed (HS) applications because of their high rotor structural integrity and their fairly well-established manufacturing process guaranteeing high quality series products. Designing a new HS electric machine requires a multidisciplinary team to accomplish the machine performance desired. In case of a HS machine design, the components and applied materials often reach their physical limits at the rated operating condition. Therefore, the design process is highly iterative and, thus, a systematic approach has a high potential to reduce the time of the design phase significantly. In this article, a systematic design process is proposed for a modular, multimegawatt (MMW) HSIM with three radial active magnetic bearings. The process includes a traditional multidisciplinary design flow with extra critical aspects of MMW HS machines: manufacturability, bearing system, housing, and operating unit. In addition, the manufactured machine is reported. The proposed systematic design process is described, including several multidisciplinary critical design aspects of HS machinery.

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Section: A Mechanial Design Of the Rotormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and Manufacturing of a Modular Low-Voltage Multimegawatt High-Speed Solid-Rotor Induction Motor

Kurvinen

Petrov

et al. 2021

IEEE Trans. on Ind. Applicat.

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“…Unlike PMSM rotors, the ALA-SynRM rotor does not require rare earth permanent magnets. Moreover, there is no need for the complicated squirrel-cage structure found in IM rotors, which can limit the maximum rotational speed of the rotor by decreasing the rigidity of the rotor [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Steel and Ni-Based Superalloy Joints for Rotors of High-Speed Electric Motors

et al. 2022

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High-speed electric motors, e.g., axially laminated anisotropic synchronous reluctance motors (ALA-SynRM), use a solid rotor manufactured by joining alternating layers of magnetic and non-magnetic metallic sheets. The strength of the dissimilar metallic joints is critical for the rotor’s ability to withstand the operating conditions of the high-speed electrical machine. In this work, various dissimilar metallic joint configurations that can be used in high-speed ALA-SynRM rotors are studied by analyzing the shear strength, microstructure, hardness, and composition of the joints. Metallic joints of structural steels and Inconel® alloys fabricated by vacuum brazing and hot isostatic pressing (HIP) are studied. Finite element analysis (FEA) was performed to calculate the maximum shear stress of the joints that were subjected to various high speed operating conditions. The shear strength of the test specimens was measured and compared with FEA results. The microstructure and chemical composition of the joints were studied by using optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) on SEM. The results show that the hot isostatic pressed S1100MC-IN718 joint achieved the highest ultimate shear strength (233.3 MPa) followed by vacuum brazed S355MC-IN600 joint (230.1 MPa) and HIP S355-IN718 (203.5 MPa), thereby showing that vacuum brazing and HIP can be viable manufacturing methods to fabricate a high-speed ALA-SynRM rotor.

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Electric/Hybrid-Electric Aircraft Propulsion Systems

et al. 2021

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Comparison of the Performance of Different Asynchronous Solid-Rotor Constructions in a Megawatt-Range High-Speed Induction Motor

Cited by 4 publications

References 10 publications

Design and Manufacturing of a Modular Low-Voltage Multimegawatt High-Speed Solid-Rotor Induction Motor

Design and Manufacturing of a Modular Low-Voltage Multimegawatt High-Speed Solid-Rotor Induction Motor

Microstructure and Mechanical Properties of Steel and Ni-Based Superalloy Joints for Rotors of High-Speed Electric Motors

Electric/Hybrid-Electric Aircraft Propulsion Systems

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