Commutator motor;  Powell conjugate direction method;  Internal penalty function method;  Interpolation techniques

The design characteristics of the claw pole type changeless motor are introduced, and the six-phase 30° phase winding is proposed to improve the torque characteristics of the motor. The internal penalty function method of Powell conjugate direction method is selected, and the effective material cost of the motor is used as the objective function to optimize the design of the claw pole without changer. The calculation results show that the effective cost of the motor is reduced by an average of 13.2%.