Comparison of state-of-the-art high-speed high-power machines: Research study including a design example of a 50000 rpm induction machine

Lahne, Hans-Christian; Gerling, Dieter

doi:10.1109/iecon.2015.7392646

Cited by 13 publications

(2 citation statements)

References 23 publications

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“…High-speed (HS) machines, as compared with conventional machines, provide higher power and torque density with improved overall system efficiency [1]. Due to these advantages, HS machines constitute a superior solution in several application areas, such as such as medical appliances, energy systems, and high-end machining tools [2,3]. In such systems, the direct drive solution permits the elimination of mechanical transmission, thus reducing the drive system weight while increasing its reliability [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…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]. SRMs are considered when cost and robustness are critical [8].…”

Section: Introductionmentioning

confidence: 99%

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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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