Finite element analysis and structure optimization of the multipole axial flux reluctance resolver

According to relatively large measurement error of one pair pole axial-flux resistance resolver, a multipole axial-flux reluctance resolver is put forward, which could solve the problem of the high-order harmonic interference and the influence of stator eccentricity and rotor eccentricity on precision. By using calculus method, the mathematics model of this new reluctance resolver is calculated. The validity and feasibility of design proposal are tested by finite element analysis. The analysis results show that the high order harmonic of output voltage makes voltage waveform distortion and causes errors, in which the third harmonic ratio accounts for a large proportion of total harmonic distortion rate. By optimizing the rotor structure, the third harmonic of output voltage is weakended so that the measurement error of the multipole axial-flux reluctance resolver is effectively reduced.