The calculation of radial force wave weakened percentage for doubly salient motor based on improved magnetic field division method

The paper presents an improved magnetic field division method based on parabola arc equation for calculating air gap permeance in doubly salient motor, which could gain more effective and precise result on calculating equivalent magnetic circuit for complex stator or rotor profile. Taking the switched reluctance motor (SRM) with slot on each side of the rotor tooth for example, this paper have calculated the weakened percentage of radial force wave by equivalent magnetic circuit method. And the finite element analysis(FEA) is applied for verification, meanwhile, it is compared the computing results of the air gap permeance by magnetic field division method using parabola and ellipse arc equation respectively, all which could verify the effectiveness and veracity of the method proposed.