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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Proceedings ArticleDOI
Analysis of thermal cycling stress on semiconductor devices of the Modular Multilevel Converter for drive applications
TL;DR: In this article, the impacts of various control strategies on thermal cycling stress of the semiconductor devices of the Modular Multilevel Converter (MMC) for drive applications are investigated.
Proceedings ArticleDOI
Analysis and mitigation of reflected wave voltages and currents in WBG devices based motor drives
TL;DR: In this paper, the effect of inductive source impedance and RC terminal network on the reflected wave phenomenon and the switching loss of the device was investigated in 2-L converters.
Proceedings ArticleDOI
A Modular Multi-level Converter (M2LC) based on Inductive Power Transfer (IPT) technology
Baljit Riar,Udaya K. Madawala +1 more
TL;DR: In this paper, the authors proposed a new Modular Multi-Level Converter (M2LC) topology, which is based on an Inductive Power Transfer (IPT) technology.
Journal ArticleDOI
Predictive Nearest-Level Control Algorithm for Modular Multilevel Converters With Reduced Harmonic Distortion
Minh Nguyen,Sangshin Kwak +1 more
TL;DR: In this article, an improved predictive NLC (I-PNLC) method combining NLC and model predictive control (MPC) is proposed, where the output and circulating currents are regulated with the corresponding predicted references, and the output voltage is controlled by the added voltage correction.
Patent
Apparatus and method for controlling medium voltage inverter
TL;DR: In this paper, an apparatus and method for controlling medium voltage inverter, whereby a frequency outputted by the inverter is fixed, in a case an instantaneous power interrupt occurs while the medium-voltage inverter drives a motor, is reduced and outputted in response to a predetermined deceleration slope.
References
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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.
Book
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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