Impact of DC-Link Voltage Ripples on the Machine-Side Performance in NPC H-Bridge Topology

Shen, Jie; Schröder, S.; Gao, Jian; Qu, Bo

doi:10.1109/tia.2016.2543684

Cited by 19 publications

(1 citation statement)

References 14 publications

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“…In fact, there are some reports about solving the imbalance in capacitor voltages of the NPC/H bridge topology. Most use two six-pulse rectifying devices to obtain two independent DC powers to supply each phase, which not only increases the complexity of the topology, but also increases the cost of the system circuit [13,14].…”

Section: Introductionmentioning

confidence: 99%

A Method for the Simultaneous Suppression of DC Capacitor Fluctuations and Common-Mode Voltage in a Five-Level NPC/H Bridge Inverter

Song

et al. 2019

Energies

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To suppress the direct current (DC) capacitor voltage fluctuations and the common-mode voltage (CMV) in a three-phase, five-level, neutral-point-clamped (NPC)/H-bridge inverter, this paper analyzes the influence of all voltage vectors on the neutral point potential of each phase under different pulse mappings in detail with an explanation of the CMV distribution. Then, based on the traditional space vector pulse width modulation (SVPWM) algorithm, a dual-pulse-mapping algorithm is proposed to suppress the DC capacitor fluctuations and the CMV simultaneously. In the algorithm, the reference voltage synthesis selects the voltage vector that has the smallest CMV value as the priority. In addition, the two kinds of pulse mappings that have opposite effects on the neutral point potential are switched to output. At the same time, regulating factors are introduced to adjust the working time of each voltage vector under the two pulse mappings; then, the capacitor voltages can be balanced. Both the simulation and experiment demonstrate the algorithm’s effectiveness.

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Section: Introductionmentioning

confidence: 99%