| Abstract |
Harmonic-afflicted effects of permanent magnet synchronous machines with high power density arehardly faced by traditional current PI controllers, due to limited controller bandwidth. As a consequence,currents and lastly torque ripples appear. In this paper, a new deadbeat current controller architecturehas been presented, which is capable to encounter the effects of these harmonics. This new controlalgorithm, here named 'Hybrid-Deadbeat-Controller', combines the stability and the low steady-stateerrors offered by common PI regulators with the high dynamic offered by the deadbeat control.Therefore, a novel control algorithm is proposed, capable of either compensating the current harmonicsin order to get smoother currents or to control a varying reference value to achieve a smoother torque.The information needed to calculate the optimal reference currents is based on an online parameterestimation feeding an optimization algorithm to achieve an optimal torque output and will beinvestigated in future research. In order to ensure the stability of the controller over the whole area ofoperation even under the influence of effects changing the system's parameter, this work as wellfocusses on the robustness of the 'hybrid' dead beat controller. |
