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This paper proposes a variable sampling frequency model predictive control (VSF-MPC) to achieve fixed-switching frequency operation for a neutral-point clamped (NPC) inverter. The proposed control technique simultaneously considers load current control, balancing of DC-link capacitor voltages, mitigation of common-mode voltage, and elimination of even-order and inter-harmonics in the load current...
While the known modulation and control techniques for single-phase matrix converters are based on pulse width modulation or space vector modulation, this paper presents a finite control set model predictive control strategy with a prediction horizon of one sampling time to control the singlephase matrix converter. The presented converter is meant to be used in cascaded configurations for high power...
Unbalanced DC currents in parallel current source inverters cause unequal power division in the inverters, higher harmonic content at the AC load side and generally, system performance decline. In this paper, a novel Space Vector Modulation is introduced for a 5-level parallel current source inverter with DC current balance control. The method is working by synthesizing the rotating current reference...
Current source converters are the state of art in high power applications featuring several advantages such the simplicity in the topology, the regeneration capability and the capacity to produce sinusoidal input currents. This converter features a very weak damped LC filter in the input, whose resonance frequency can be excited by the control and harmonics of the mains. In this work a new predictive...
A 5-level current source inverter (CSI) is proposed in this paper for high-power applications. The converter topology consists of two full-bridge current source inverters whose outputs are connected in parallel for a large induction motor. The two inverters are fed by two isolation transformers to the elimination of possible circulating currents. A space vector modulation scheme is developed for the...
A power circuit topology suitable for large medium voltage AC drive applications is presented. The line side harmonics requirements are met by using an 18 pulse phase-controlled rectifier. The output horsepower of the drive is increased by connecting two inverters in parallel. The low switching frequency used in the inverters makes this approach especially attractive in very high power applications...
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