CALCULATION OF MAGNETIC LOSSES AND ENERGY EFFICIENCY OF A MAGNETIC GEARBOX WITH A MODULATED MAGNETIC FIELD

• Datum: 2025
• Hauptverfasser: Grebenikov , V., Podoltsev , O., Tazhibaev, А., Arynov , N., Sakhno , O.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Institute of Renewable Energy National Academy of Sciences of Ukraine 2025
• Schlagworte: wind turbine; magnetic gearbox; magnetic losses; computer modeling; energy efficiency map of the gearbox.
• Online Zugang: https://ve.org.ua/index.php/journal/article/view/510
• Назва журналу: Vidnovluvana energetika

In this article, a simplified mathematical model is used to calculate magnetic losses in the ferromagnetic elements of a magnetic gearbox to analyze the distribution in space and time of magnetic induction in its core. This takes into account the peculiarities of using such a magnetic gearbox (multiplier) in a lowpower wind power plant. It is shown that when considering only the first harmonic components in the distribution of the magnetomotive forces of both rotors and the specific magnetic conductivity of the air gap, the magnetic induction in the air gap contains six components that have different pole pitch, move with different angular velocities and in different directions. According to the results of the calculations, it is shown that when the modulator is used as a low-speed shaft connected to a wind turbine, in the steady-state mode, all components of magnetic induction in the moving coordinate system x of the modulator change with the same angular velocity Fe  p  2 = , which depends on the number of pole pairs of the external rotor and the rotation speed of the modulator together with the wind turbine - Fe . Under these conditions, the magnetic losses in the ferromagnetic poles of the modulator are calculated. Based on these data and considering mechanical losses, an energy efficiency map of the magnetic gearbox is constructed, representing its efficiency's dependence on the modulator rotation speed and mechanical torque on its shaft. The constructed efficiency map of the magnetic gearbox is the basis for calculating the efficiency of the entire wind power plant containing such a gearbox. The calculation of the characteristics of the magnetic gear was carried out in the Simcenter Magnet software package. Bibl. 20, Fig. 5.