Analytical Method for Optimal Control of Switched Reluctance Generator

This paper presents an analytical method to optimally calculate the turn-on angles for the switched reluctance generator (SRG) interfaced with a bidirectional DC-DC converter (BDDC). The proposed analytical method considers the nonlinear inductance profile of the SRG drive and the back electromotive force (BEMF) developed, which are usually neglected with the classical analytical methods. The proposed method automatically adjusts the excitation parameters concerning the operating speed. Thus, the proposed method calculates the excitation angle, which mainly depends upon prime mover speed, dc-link voltage, reference current and the slope of the non-linear inductance profile of SRG. So when the speed increases, the optimal turn-on excitation angle is online, varying with speed to ensure the proper initial excitation of SRG. The prototype 4-phase SRG is designed in ANSYS/Maxwell, and the SRG model obtained is then developed in MATLAB/Simulink environment. The claims of the proposed analytical method are verified via simulation and experimental validation.