Sliding Mode Predictive Control of Induction Motor Fed by Five-Leg AC–DC–AC Converter with DC-Link Voltages Offset Compensation

[摘要] This paper presents experimental performance improvement of induction motor fed by five-leg AC–DC–AC converter with DC-link voltages offset compensation. In order to control the rectifier, a sliding mode control approach is proposed to track the DC-link voltage. The grid-side converter control is performed via a predictive power control, which minimizes the instantaneous input reactive power present in the system and compensates the undesirable harmonic contents of the grid current, under a unity power factor. In motor side, the inverter control is performed via a predictive torque control to achieve an accurate torque and flux references tracking with ripples reduction. The implementation of the proposed control architecture is achieved via a dSPACE 1104 card. The experimental results show that the proposed control strategy develops a faster active power response leading to low DC-link voltage variation, while the grid current is nearly sinusoidal with low total harmonic distortion. Experimental results reveal also that the drive system, associated with PTC technique, can effectively reduce flux and torque ripples with better dynamic and steady-state performance. Further, the proposed approaches minimize the average switching frequency.

[学科分类] 自动化工程

[关键词] AC–DC–AC power converter ;Induction motor ;Sliding mode control ;Predictive torque control ;Total harmonic distortion ;dSPACE 1104