How to reduce the cogging torque of the integrated propeller motor is an important means to improve its noise performance because cogging torque is one of the key factors causing torque ripple. We proposed a method to reduce the cogging torque by optimizing the size of the Halbach array’s auxiliary pole. First. an analytical model for the airgap magnetic field of Halbach array b... https://www.macorners.shop/product-category/heart-puzzle-necklace-gift-box/