Eigenvalue detection method for SRM rotor position estimation

The method of injected high frequency pulse to non-excitation phase is ordinary for Sensorless operation of switched reluctance machine. The advantage of this method is easily, no extra hardware, and the algorithm is simple, However, the reference of the current is required, and no double rhythm operating characteristic. In this paper, the method of eigenvalue detection is proposed, the method is not only the advantage of injected high frequency pulse, but only no reference current and double rhythm operating. The estimation algorithm makes full use of the geometrical characteristic of inductance curves and rotor position, and the basic principle of this method is analyzed, simulations and real-time implementation of the sensorless scheme using Matlab-simulink are carried out based on a 12/8 SRM, the result of which shows the feasibility of the algorithm. Finally, the experimental results show that eigenvalue detection possesses function and high reliability.