Direct instantaneous torque and force control: A novel control approach for switched reluctance machines

Abstract

Switched-reluctance technology is appealing to the automotive industry due to its cost efficiency. Conventional research focuses on the two main issues torque ripple and acoustic noise. However, control schemes usually only address one of these two issues at a time. This paper unifies the approaches of direct instantaneous torque control and direct instantaneous force control to simultaneously tackle the two central drawbacks of the switched reluctance machine.A searching algorithm was used to determine appropriate reference values for each phase to keep torque and overall radial force smooth at any time. Simulation and measurement results confirmed that the control objectives were met so that the torque ripple was reduced and the acoustic behavior of the investigated automotive traction drive was improved. The new control approach thus provides future engineers with a powerful tool for adapting the switched reluctance machine to the requirements of the automotive sector.

Advanced Control of Switched Reluctance Motors (SRMs): A Review on Current Regulation, Torque Control and Vibration Suppression

“…Although the mode-0 noise is indeed reduced with the above methods, the torque ripple is inevitably introduced since the radial force and torque characteristics differ a lot. To mitigate the radial force and torque ripple simultaneously, [195], [196] rearranged the radial force reference for the two conducting phases during the commutation period to reduce the torque ripple, at the cost of increased RMS current value when compared to the conventional method. Alternatively, [197]- [199] slightly modified the torque ripple minimization reference current by coordinating with the direct force controller, so the vibration is significantly reduced and the toque ripple is kept almost the same when compared with the results of torque ripple minimization controller.…”

A Review of Torque Ripple Minimization Techniques in Switched Reluctance Machine

“…The implementation of this switching strategy plays an important role in minimizing the torque ripple. In [10,16], the torque pulsations which contributes to torque ripple was largely reduced using DITC. Simulation results showed that torque ripple was reduced to approximately 38% of the machine average torque of 40Nm.…”

Estudo comparativo de técnicas de minimização de ondulações de torque de motores de relutância variável trifásicos para aplicações em veículos elétricos

“…Na literatura são encontrados diferentes algoritmos usados com o CDTI [24,109,111,115]. Em [115] foi implementado um controle direto de torque e força instantâneos, no qual tanto o torque quanto a força radial são controlados com o perfilamento do fluxo magnético concatenado.…”

“…Na literatura são encontrados diferentes algoritmos usados com o CDTI [24,109,111,115]. Em [115] foi implementado um controle direto de torque e força instantâneos, no qual tanto o torque quanto a força radial são controlados com o perfilamento do fluxo magnético concatenado. Em [111] um controlador PI é adicionado ao sistema de controle para minimizar as ondulações de torque, entretanto esta abordagem torna a resposta do sistema mais lenta.…”