Journal ArticleDOI
A Medium-Voltage Motor Drive With a Modular Multilevel PWM Inverter
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TLDR
In this article, the authors describe the control and operating performance of a modular multilevel PWM inverter for a transformerless medium-voltage motor drive, where the inverter is prominent in the modular arm structure consisting of a cascaded stack of multiple bidirectional choppercells.Abstract:
This paper describes the control and operating performance of a modular multilevel PWM inverter for a transformerless medium-voltage motor drive. The inverter is prominent in the modular arm structure consisting of a cascaded stack of multiple bidirectional chopper-cells. The dominant ac-voltage fluctuation with the same frequency as the motor (inverter) frequency occurs across the dc capacitor of each chopper-cell. The magnitude of the voltage fluctuation is inversely proportional to the motor frequency. This paper achieves theoretical analysis on the voltage fluctuation, leading to system design. A downscaled model rated at 400 V and 15 kW is designed and built up to confirm the validity and effectiveness of the nine-level (17-level in line-to-line) PWM inverter for a medium-voltage motor drive.read more
Citations
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Journal ArticleDOI
Medium-Voltage Drives: Challenges and existing technology
TL;DR: An overview of state-of-art solutions, advances, and design and research trends in medium-voltage (MV) drive technologies is presented in this article, where the authors discuss the challenges and requirements associated with the use of such drives.
Journal ArticleDOI
A Submodule Implementation for Parallel Connection of Capacitors in Modular Multilevel Converters
Kalle Ilves,Franz Taffner,Staffan Norrga,Antonios Antonopoulos,Lennart Harnefors,Hans-Peter Nee +5 more
TL;DR: In modular multilevel converters there is a trade-off between the switching frequency and the voltage ripple in the submodule capacitors as mentioned in this paper, and the reason for this is that it becomes increasingly difficu...
Journal ArticleDOI
Low-Frequency Ripple Suppression for Medium-Voltage Drives Using Modular Multilevel Converter With Full-Bridge Submodules
TL;DR: In this article, the authors proposed a new solution to address the problem of low-frequency voltage fluctuation in medium-voltage (MV) motor drives by using full-bridge submodules (SMs) in the place of half-bridge SMs.
Journal ArticleDOI
Closed-Loop Precharge Control of Modular Multilevel Converters During Start-Up Processes
TL;DR: In this paper, two closed-loop precharge control methods are proposed to charge the submodule capacitors of the modular multilevel converter (MMC) during dc-side and ac-side start-up processes.
Proceedings ArticleDOI
Control of the modular multilevel cascade converter based on triple-star bridge-cells (MMCC-TSBC) for motor drives
Wataru Kawamura,Hirofumi Akagi +1 more
TL;DR: The triple-star bridge-cells (TSBC) as discussed by the authors is a new family member of the modular multilevel cascade converter (MMCC) with the given name, Triple Star Bridge-cells, which is suitable for a medium-voltage motor drive requiring regenerative braking.
References
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Journal ArticleDOI
Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components
TL;DR: In this paper, a new instantaneous reactive power compensator comprising switching devices is proposed, which requires practically no energy storage components, and is based on the instantaneous value concept for arbitrary voltage and current waveforms.
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Instantaneous power theory and applications to power conditioning
TL;DR: The p-q theory in three-phase, four-wire Shunt Active Filters as discussed by the authors has been applied to power flow control in power electronics equipment and has been shown to be useful in many applications.
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High-Power Converters and AC Drives
TL;DR: In this article, the authors present a model for high-power switchings with SCR rectifiers and demonstrate how to use SCR Rectifiers to control high power switchings.
Journal ArticleDOI
Control and Experiment of Pulsewidth-Modulated Modular Multilevel Converters
Makoto Hagiwara,Hirofumi Akagi +1 more
TL;DR: In this article, two types of pulsewidth-modulated modular multilevel converters (PWM-MMCs) with focus on their circuit configurations and voltage balancing control are investigated.
Journal ArticleDOI
Active Harmonic Filters
TL;DR: This paper deals with general pure active filters for power conditioning, and specific hybridactive filters for harmonic filtering of three-phase diode rectifiers.
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