hypertension

torque

squamous cell

pmsm

magnet synchronous

dynamics simulations

torque ripple

reduction co

neurodegenerative_108147

switched reluctance

porphyria

torque_99783

torque control

electroless plating

IEEE Transactions on Industrial Electronics

The direct torque control (DTC) method was introduced into the switched reluctance motor to reduce its inherent output torque ripple. However, the conventional DTC method produces negative torque more or less, which reduces the torque-ampere ratio of motors. This paper proposes a new DTC method by three improvements. First, the hysteresis-loop control of flux is removed. New selection rule of voltage vectors is established to reduce the torque ripple. Second, the sectors divided in electrical space are reorganized by their actual positions according to the inductance profile. The boundaries between certain sectors are calculated and updated according to real-time working conditions. Finally, the alternative voltage vectors for increasing or decreasing torque are distinguished by whether any phase is excited. Therefore, the output torque tracks the reference accurately, which reduces the torque ripple. Moreover, the negative torque is avoided by the real-time regulation of the turn-off angle, and the torque-ampere ratio is increased accordingly. Simulation and experimental results verify the demonstrated performance of the proposed DTC method.

Direct Torque Control for Switched Reluctance Motor to Obtain High Torque–Ampere Ratio