Optimal design of tooth and yoke for maximizing motor output power

Optimization of geometry is the one of the most important process in the electrical motor design. Among of the various design parameters tooth and yoke width are the dominate variables that can maximize he back electromotive force (Back-EMF) and on-load torque. In this paper, in order to design the tooth and yoke width effectively, an equivalent magnetic circuit used to calculate the reluctance is proposed. The optimal value of tooth and yoke width for minimizing total reluctance can be obtained by this equivalent magnetic circuit rather than by time-consuming finite element analysis (FEA). The proposed method will be compared with FEM to verify its validity.