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Thermal analysis of a pm sm using fea and lumped parameter modeling

100%
Mynarek P., Kowol M.
Czasopismo Techniczne
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PL
Permanent magnet synchronous motors are often used in hybrid electric vehicles due to the high power density. Overheating in a PMSM motor can cause negative effects on the work of permanent magnets and a significant shortening of the life of the machine due to the phenomenon of the thermal ageing of insulation. Therefore, it is extremely important to know the exact temperature distribution in different parts of the electrical machine under various operating conditions. This paper presents a lumped parameter thermal model and FE model of a permanent magnet synchronous motor. A method for the homogenization of a stator winding is also described. In order to validate the accuracy of the calculation results, measurements on the physical model of the machine were carried out.
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An analysis of the influence of selected design and material parameters on high-speed eddy-current brake performance

81%
Kołodziej J., Kowol M., Garbiec T.
Czasopismo Techniczne
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PL
This paper presents an analysis of the influence of utilizing rotor materials of different magnetization and conductivity on steady-state torque-speed characteristics for a high-speed eddy-current brake. The analysis involves rotors of different active lengths, with or without axial slits and a copper layer on the surface. The calculations were carried out using two and three-dimensional numerical models, partially verified on the laboratory test-stand.
3
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An analysis of magnetic gear performance

81%
Kowol M., Kołodziej J., Łukaniszyn M.
Czasopismo Techniczne
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PL
Continuous development of technology determines the search for new solutions in the field of electric machine design with improved electromechanical properties. In recent years, there has been an increased interest in passive and active magnetic gears. This paper presents the design, operation and performance analysis of the modified magnetic gear. The new prototype magnetic gear allows obtaining a ratio of 4:1 or 5:1. For the analyzed construction, two and three-dimensional numerical models are developed for which the series of the magnetic field calculations are carried out . The characteristics of the magnetic torque vs. angle position of the inner rotor with respect to the intermediate ring (modulation ring) and the outer rotor are determined and compared. The examples of flux density distributions for the analyzed converter construction are presented. The calculation results are verified with measurements on the prototype.
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