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In this paper, harmonic analysis and comparison of permanent magnet vernier (PMV) and magnetic-geared (MGd) machines are presented. The key is to analytically solve the governing Laplacian/quasi-Poissonian field equations in the air-gap regions. By using the time-stepping finite-element method, the analytical method is verified. Hence, the performances of the PMV machine are quantitatively compared with that of the MGd machine. The results show that the PMV machine can offer higher no-load EMF and higher torque-handling capability than its counterpart. Finally, the experimental result is given to further verify the validity of the analysis.
Date of Publication: Oct. 2011