Air-Gap Flux Density Waveform Characteristics of Halbach Array Rotating Machines

Based on the six poles slotless Halbach array machine model,the number of magnetic steels per pole under the optimum air-gap flux density waveform is known by analyzing the change of the waves with different numbers of each pole magnetic steels.Besides,with the number of magnet steels per pole increasing,the degree of sinusoid of air gap flux density waveform and the variation laws of air gap flux density harmonic and amplitude are also studied.The number of magnet steels per pole is respectively known under the maximum flux density amplitude and comprehensive consideration with the degree of sinusoid of air gap flux density waveform and amplitude magnitude.