Direct torque control of switched reluctance motors using four level convertor

• Published in: 2011 19th Iranian Conference on Electrical Engineering pp. 1 - 6
• Main Authors: Bosra, M. M., Saniei, M., Kianinezhad, R.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-05-2011
• Subjects: Demagnetization; direct torque control; four level converter; Hysteresis motors; Mathematical model; Reluctance motors; Stators; switched reluctance motor; Switches; Torque
• ISBN: 1457707306; 9781457707308
• ISSN: 2164-7054

Switched reluctance motors (SRM) have several features, including an intrinsic simplicity, low cost, low inertia and high starting torque. However, it suffers large torque ripple and acoustical noise especially in high speed region. In high speed region, the SRM phase excitation time is very short compared to the low speed region. In this region, the excitation current cannot be built-up sufficiently. Also, the demagnetization current can be easily extended to the negative torque region. This may create high ripple in the output torque. To obtain a fast current and suitable demagnetization current, a four level converter and DTC with new switching algorithm is used. The proposed switching algorithm is demonstrated through the computer simulation in MATLAB/Simulink. Then, the obtained results are verified by comparison with the corresponding results of DTC with conventional asymmetric converter.