Dynamic modeling of a four-phase 8/6 switched reluctance motor using current and torque look-up tables

The paper presents dynamic modeling of a commercially available 1-hp 4-phase 8/6 switched reluctance motor (SRM) using nonlinear 2D look-up tables created from its measured flux linkage and static torque data. A model for each phase consists of a flux linkage estimator, a current look-up table and a torque look-up table. The current look-up table was achieved for 101 data of flux linkage (from 0 to 0.275 Wb·t) by 115 rotor positions (from -30° to 30°). Besides, the torque lookup table was achieved for 14 data of current from (0 to 6.5 A) by 115 rotor positions (from -30° to 30°). The machine model was then tested in Matlab/Simulink environment and also experimentally verified. An asymmetric half-bridge converter, which was driven by DS1102 DSP real-time control environment, applied single-step voltage, single-pulse control voltage and current-regulated PWM voltage to the motor windings. The agreement between simulation and experimental results has confirmed the accuracy of the proposed model.