Direct Torque Control of Switched Reluctance Motor Based on Optimization of Switch Table

In order to solve the problem of large torque ripple and low efficiency in the application of traditional direct torque control (DTC) in switched reluctance motors (SRM), an improved DTC based on rotor position reorganization and switching table optimization is proposed. Use the rotor position to re-divide the electrical space sectors, so that the new sector division can more accurately reflect the working state of the SRM, weaken the traditional DTC on the flux hysteresis constraint, and optimize the selection of the voltage vector according to the positive and negative torque characteristics of each phase, To minimize the generation of negative torque, and improve the torque/ampere ratio of the motor while achieving the torque ripple suppression function. Taking the three-phase 6/4-pole SRM as the controlled object, the traditional DTC and the improved DTC were simulated and compared. The results show that the new method has a significant effect on improving torque ripple suppression and improving motor efficiency.