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A simplified model predictive current control (MPCC) for four-switch three-phase inverter (FSTPI)-fed permanent magnet synchronous motor (PMSM) considering the periodic fluctuation of the capacitor voltages is proposed. After analysing the inherent features of the FSTPI-fed PMSM system, an offset voltage vector and an ideal reference voltage vector are defined, which allows to deal with the reference...
To compensate the voltage imbalance of the two split dc-link capacitors in a four-switch three-phase inverter fed direct torque control system, a modified space vector modulation (SVM) approach is proposed in this paper. The theory, design, and implementation of the modified SVM based DTC are discussed in detail, a new sector division method based on the real basic voltage vectors is introduced and...
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