Novel Analytical Calculation Method for the Non-Linear ψ-i-Characteristic of Switched-Reluctance-Machines in the Aligned Rotor Position

Knowing the non-linear ψ-i-characteristic is crucial for the design of switched reluctance machines, especially for the aligned position. So far, analytical calculations are based on complex models of the magnetic circuit or on functions needing a fitting procedure (using measured or FEM-calculated data). In this paper, a method is presented that requires only very few input data. In addition, these input data can be deduced easily from the geometry of the machine. Comparisons with measured data show quite a good correlation, qualifying this method to be used in the design procedure of new switched reluctance machines.