Abstract |
Based on Schwarz-Christoffel mapping and Maxwell stress tensor, new analytical formulas to calculate the torque of the SRM and DSPMM are derived. Through the new expression, it is easy to understand the relationship between the torque and the design parameters of the machine. Additionally, the force distribution on the rotor tooth contour is presented. By using the torque formulas, the torque densities of the two machines are compared. Finally, the analytical formulas are verified by FEA method. |