Sensorless Control of Switched Reluctance Motor in Full Range of Speed Based on DSP

Mechanical position sensors of speed regulation system of traditional switched reluctance motor(SRM) have brought many restrictions to the system,such as increasing complexity of structure,raising cost and decreasing reliability.A novel sensorless control scheme combined with voltage pulses method and improved simplified stator flux linkage method was proposed,which uses the voltage pulses method at standstill and near-zero speed as well as the stator flux linkage method at medium and high speed. The experimental result of 12/8 SRM based on TMS320F2812 DSP verified the validity and feasibility of the scheme,which makes SRM have small torque ripple,large output torque and good dynamic performance.The scheme is suitable for industrial field in full range of speed.