Comparison of High-Speed Electrical Motors for a Turbo Circulator Application

Uzhegov, Nikita; Bárta, Jan; Kurfürst, Jiří; Ondrůšek, Čestmír; Pyrhönen, Juha

doi:10.1109/tia.2017.2700793

Cited by 29 publications

(9 citation statements)

References 19 publications

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“…However, when operated at high speeds, some characteristic issues need to be considered in the design of HSPMGs, including electromagnetic field distribution, power loss, thermal distribution, rotor stress and rotor dynamics [9][10][11]. Electromagnetic characteristics should be designed first, such as the induction voltage, load current, power loss and efficiency etc., which are the premise of the analysis of mechanical and temperature characteristics [12,13]. Nevertheless, some structural parameters have a great influence on the electromagnetic performances, such as the rotor diameter, the PM thickness and the number of conductors per slot [14,15].…”

Section: Introductionmentioning

confidence: 99%

Multiphysics analysis of high‐speed permanent magnet generators for waste heat application

Huang

2020

IET Electric Power Applications

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In the direct drive waste heat power system, the turbine is directly connected to high-speed permanent magnet generators (HSPMGs), and the transmission efficiency, service life and system volume can be obviously improved by removing the gearbox and screw rod. However, in the design of high-speed electrical machines, a comprehensive multiphysics analysis must be conducted in order to meet various requirements of electromagnetic, mechanical and thermal specifications simultaneously. The design of one HSPMG by the multiphysics approach for the electromagnetic and loss characteristics, rotor stress, rotor dynamics and fluid-thermal parameters, which satisfies all specified multiphysics constraints, is presented. The theoretical results are confirmed by the experimental results on a prototype in terms of electromagnetic, mechanical and thermal characteristics, such as induced voltage, load current, rotor continuous operation and temperature distribution.

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Section: Introductionmentioning

confidence: 99%

Multiphysics analysis of high‐speed permanent magnet generators for waste heat application

Huang

2020

IET Electric Power Applications

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“…The available literature shows a tendency to the use of permanent-magnet (PM) synchronous machines, solid rotor induction machines (IMs), and switched reluctance machines (SRMs). The PM synchronous machines have superior electromagnetic performance, with higher power density and efficiency [4,6]. Compared with PM synchronous machines, solid rotor IMs, with a robust rotor structure, have lower maintenance requirements and field weakening capabilities at lower costs [3,7].…”

Section: Introductionmentioning

confidence: 99%

“…Numerical methods, e.g., finite-element methods (FEM), are a consolidated technique, widely used for its capability of modeling complex structures and non-ideal materials properties [12][13][14]. In design stages of HS electrical machines, FEM can provide precise results in a multiphysics simulation environment, where the electromagnetic, mechanical and thermal constraints are evaluated [6]. Nonetheless, these are time-consuming and require large storage memory [15,16].…”

Section: Introductionmentioning

confidence: 99%

Improved Semi-Analytical Magnetic Field Solution for High-Speed Permanent-Magnet Machines With Permeable Retaining Sleeve Including Diffusion Effect

Mendonça¹,

Maia²,

Filho³

2020

PIER B

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This work presents a novel semi-analytical model for magnetic field calculation in a highspeed surface-mounted permanent-magnet machine with conducting and permeable retaining sleeve. The retaining sleeve with conducting material and non-homogeneous permeability affects the machine electromagnetic performance by altering main flux inductance and developed torque profile. This performance deviation can be attributed to eddy-current reaction field and saturation, the latter occurring due to pole-to-pole leakage flux. Saturation is modeled with a space-varying relative permeability, expressed as a Fourier series. Eddy-currents are evaluated with an auxiliary winding, defined as a surface current density in the conducting region. The proposed method is based on well-established Maxwell-Fourier method. This permits other analysis, such as slotting effect through subdomain technique. The assumptions considered for the developed semi-analytical solution in two-dimensional problem are presented in depth and confronted with finite-element method results, confirming validity of proposed methodology.

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“…(high-strength VCoFe laminations) are 367 m/s, 294 m/s, and 210 m/s, respectively. The solid steel rotor is more robust than other types of rotor structures, and thus, a high power density and torque density can be easily achieved, which makes the solid rotor IMs popular and widely used in many industrial applications, such as air compressors, submersible pumps, and turbos, as reported in [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Rotor Eddy-Current Harmonic Losses in High-Speed Solid-Rotor Induction Machines by an Improved Virtual Permanent Magnet Harmonic Machine Model

Petrov

Pyrhönen

2019

IEEE Access

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High-speed induction machines equipped with a solid steel rotor are capable of achieving a high-rotating speed than other types of machines, because of their simpler and more robust rotor structure. At the same time, however, the eddy-current losses in the solid rotor may be critical, because of the high conductivity of the rotor material, which makes it easy for axial eddy currents to travel in the solid rotor. To efficiently mitigate the rotor eddy-current losses, it is important to accurately determine the rotor eddycurrent losses induced by a particular harmonic in advance. In this paper, an improved virtual permanent magnet harmonic machine (VPMHM) model equipped with a sinusoidally magnetized virtual magnet based on the finite element method (FEM) is proposed for determination of the rotor eddy-current harmonic losses. The 2-D fast Fourier transform was used to accurately analyze the time-spatial air-gap flux density harmonics. The VPMHM model was enhanced to ensure that it was able to exactly produce the required flux density harmonics in the air gap. Two algorithms for the improved VPMHM models with different hybrid excitations were proposed to determine the harmonic losses together with the other important harmonic behavior. The model was further investigated to separate the electromagnetic transients from different harmonics. Finally, the simulation time for the harmonic losses required by the enhanced VPMHM model was significantly reduced by separating the harmonic transients. All the results and conclusions presented in this paper are based on the FEM analysis. INDEX TERMS Solid-rotor high-speed induction machine (IM), finite element method (FEM), 2-D fast Fourier transform, eddy-current losses, improved virtual permanent magnet harmonic machine (VPMHM).

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Comparison of High-Speed Electrical Motors for a Turbo Circulator Application

Cited by 29 publications

References 19 publications

Multiphysics analysis of high‐speed permanent magnet generators for waste heat application

Multiphysics analysis of high‐speed permanent magnet generators for waste heat application

Improved Semi-Analytical Magnetic Field Solution for High-Speed Permanent-Magnet Machines With Permeable Retaining Sleeve Including Diffusion Effect

Extraction of Rotor Eddy-Current Harmonic Losses in High-Speed Solid-Rotor Induction Machines by an Improved Virtual Permanent Magnet Harmonic Machine Model

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