Modeling nonlinear characteristics of dual stator variable reluctance motors via teeth layer permeability method

Dual stator variable reluctance motors (VRM) are electrically commutated AC machines and can be used as direct drive actuators, but inherent nonlinearity of VRM results in difficulties, when smooth, quiet operation is required. Analyzing the nonlinearity characteristics of VRM via the teeth layer specific permeability method is given in the paper. The way to establish the nonlinear equivalent magnetic circuit and nonlinear equation are present. Solving the nonlinear equation using the Newton method is introduced. Some results of analyzing nonlinear characteristics of a VRM are given at the end of the paper