Abstract
This paper presents a switch-mode rectifier (SMR) fed synchronous reluctance motor (SynRM) drive. Good driving performance over wide operating range is achieved via: (i) boosted and well-regulated DC-link voltage established by the SMR; (ii) real-time commutation angle tuning by the adaptive commutation scheme (ACS) using on-line fitted motor key parameters, and equivalently by the model-free intuitive commutation tuning (ICT) scheme; (iii) robust current control considering slotting harmonic effects; and (iv) quantitative and robust speed controls. First, the SynRM drive with fixed DC-link voltage is established. The real-time commutation tuning scheme with motor total loss minimization is proposed. Then the dynamic current and speed control schemes are designed. The feedback controllers are augmented with simple robust control schemes to have satisfactory responses. Under well-regulated DC-link voltage, good line drawn power quality is obtained simultaneously. Moreover, the regenerative braking power can be recovered back to the utility grid. Finally, the whole SMR-fed SynRM drive is evaluated. The motor driving characteristics under higher speeds and heavier loads are enhanced.
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