Articles you may be interested inTorque analysis and measurements of a permanent magnet type Eddy current brake with a Halbach magnet array based on analytical magnetic field calculations Analysis and comparison of two two-dimensional Halbach permanent magnet arrays for magnetically levitated planar motor

In this paper, the rotor losses in the high-speed permanent magnet (PM) synchronous motor are discussed. In particular, the influence of different load conditions is highlighted in developed PM synchronous motor. On the basis of analytical field analysis, two-dimensional fast Fourier transformation, and the Poynting theorem, the flux harmonics and rotor losses are predicted and validated by finite element method. Moreover, the difference of rotor losses between the motor with rated- and overload conditions is made quantitatively clear in this work.

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When a strong on-board magnet is moved relative to a conducting sheet, a circulating eddy current will be induced in the conductor. The eddy current in turn produces a magnetic field, which by Lorentz force law, produces repulsive forces between the two magnetic fields. An experimental study on the electrodynamic suspension system was carried with a 1.5 m diameter rotary type test wheel. Two types of on board magnets are tested. One is a HTSC magnet and the other one is a Halbach-arrayed permanent magnet. The Lorentz forces of the two EDS systems are measured and compared with theoretical and numerical calculations.Index Terms-Electrodynamic suspension systems, Halbach arrayed permanent magnets, HTSC magnets.

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