Cogging torque reduction apparatus of DC brushed permanent magnet motor

摘要

The invention of the electric motor drive performance by minimizing the cogging torque (cogging torque) generated during the operation of the motor to provide a permanent magnet motor and employing a motor for which can improve significantly . The present invention to achieve this , a one-piece structure made of a hollow cylindrical shape , in at least two N and S poles in the permanent magnets alternately magnetized ( ) the motor alternately in the circumferential direction , in the axial direction formed using a polygonal surface shape so as to have a magnetic pole boundary edge of the same number as the number of poles of the magnetic pole in which the cross-sectional shape perpendicular magnetization (N -pole , S -pole) , characterized in that the cross-sectional thickness formed in the same manner as a whole . ;