Abstract
In finite control set model predictive control (FCS-MPC) strategy only one basic voltage vector is to be selected in per periodic time, which causes big current ripple as well as the torque ripple of permanent magnet synchronous motor (PMSM). To solve this problem, an improved model predictive control method, named modulated model predictive control (M2PC) is proposed. The proposed control strategy can produce a modulated waveform, which can reduce torque ripple and improve power quality. Simulation results verify that the proposed current controller has a better control performance than the classical FCS-MPC strategy.
Highlights
Multi-level converters are widely used in higher voltage range than conventional two-level converter [1]
The neutral-point-clamped (NPC) converter is often known as the three-level diode clamped converter which can improve total harmonic distortion and has bigger bandwidth than conventional twolevel converter[2]
The main drawback is that only one basic vector can be selected per periodic time, which causes big current ripple as well as the torque ripple of permanent magnet synchronous motor (PMSM)
Summary
Multi-level converters are widely used in higher voltage range than conventional two-level converter [1]. The main drawback is that only one basic vector can be selected per periodic time, which causes big current ripple as well as the torque ripple of permanent magnet synchronous motor (PMSM) Another MPC control strategy named deadbeat current predictive control having a fixed switching frequency[13]–[17]. This control strategy only predictive the reference voltage in static coordinate and use the conventional space vector pulse width modulation (SVPWM) algorithm to generate the firing pulses. It is very complex in the calculation of switching time[4].
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