Deep-Investigated Analytical Modeling of a Surface Permanent Magnet Vernier Motor

Permanent magnet Vernier motors (PMVMs) possess the advantage of high torque density for high-performance applications. However, low power factor challenge makes it unacceptable direct-drive A lack accurate modeling method based on motor sizing law, i.e., air-gap flux density, linear current and geometry parameters, raises difficulties machine designers to further conduct research performance metrics. This article presents a deep investigation into analytical technique surface PMVMs (SPMVMs). It can identify an approach obtain metrics, including electromagnetic factor. The is developed conformal mapping method. By using this, both radial tangential permeability functions be calculated magnetic loading accurately, considering leakage flux. slotting effect armature-winding function analyzed achieve precise formula computations. new applied integral-slot SPMVMs with different slot/pole combinations, gear ratios, slot openings, thickness evaluate impacts parameters high-power-factor high-torque-density designs. Finally, SPMVM characteristics fabricated verify model at rating 0.8 kW speed 500 r/min. experimental results show that prototype exhibits 0.9 22.5 Nm/L.