Asymptotic Time Domain Evaluation of a Single-Phase Cascade H - Bridge PWM Inverter Current Quality for Non-Equal DC Sources

2018 ◽  
Author(s):  
Nurzhan Zhuldassov ◽  
Alex Ruderman
Keyword(s):  
Time Domain ◽  
Single Phase ◽  
Pwm Inverter ◽  
Asymptotic Time

Asymptotic time domain evaluation of a single-phase multilevel PWM inverter current quality

2015 ◽  
Author(s):  
Boris Reznikov ◽  
Milan Srndovic ◽  
Gabriele Grandi ◽  
Bexultan Rakhim ◽  
Yakov L. Familiant ◽  
...  
Keyword(s):  
Time Domain ◽  
Single Phase ◽  
Pwm Inverter ◽  
Asymptotic Time

High-Carrier-Frequency Iron-Loss Characteristics Excited by GaN FET Single-Phase PWM Inverter

2016 ◽  
Vol 136 (2) ◽  
pp. 110-117 ◽  
Author(s):  
Takahiro Tanaka ◽  
Shoko Koga ◽  
Ryosuke Kogi ◽  
Shunya Odawara ◽  
Keisuke Fujisaki
Keyword(s):  
Carrier Frequency ◽  
Single Phase ◽  
Iron Loss ◽  
Pwm Inverter ◽  
High Carrier ◽  
Gan Fet

Measurements of single-phase and two-phase flows in a vertical pipe using ultrasonic pulse Doppler method and ultrasonic time-domain cross-correlation method

2013 ◽  
Vol 35 (3) ◽  
Author(s):  
Tat Thang Nguyen ◽  
Hiroshige Kikura ◽  
Ngoc Hai Duong ◽  
Hideki Murakawa ◽  
Nobuyoshi Tsuzuki
Keyword(s):  
Time Domain ◽  
Cross Correlation ◽  
Single Phase ◽  
Ultrasonic Pulse ◽  
Phase Flow ◽  
Beam Diameter ◽  
Vertical Pipe ◽  
Two Phase ◽  
Ultrasonic Time ◽  
Pulse Doppler

Ultrasonic Velocity Profile (UVP) method for measurement of single-phase and two-phase flow in a vertical pipe has recently been developed in the Laboratory for industrial and Environmental Fluid Dynamics, Institute of Mechanics, VAST. The signal processings of the UVP method include the ultrasonic pulse Doppler method (UDM)and the ultrasonic time-domain cross-correlation (UTDC) method. For two-phase flow, simultaneous measurements of both liquid and gas are enabled by using a multi-wave ultrasonic transducer (multi-wave TDX). The multi-wave TDX is able to emit and receive ultrasound of two different center frequencies of 2 MHz and 8 MHz at the same time and position. 2 MHz frequency with beam diameter 10 mm is exploited for measurement of gas. 8 MHz one with beam diameter 3 mm is used for liquid. Measurements have been carried out for laminar and turbulent single-phase flows and bubbly counter-current two-phase flows in two flow loops using two vertical pipes of 26 mm inner diameter (I.D.) and 50 mm I.D. respectively. Based on the measured results, assessment of each method is clarified. Applicability of each method for different conditions of pipe flow has been tested. Suggestions for application of the two methods have been recommended.

scholarly journals Feasibility of Black-Box Time Domain Modeling of Single-Phase Photovoltaic Inverters Using Artificial Neural Networks

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2118
Author(s):  
Elias Kaufhold ◽  
Simon Grandl ◽  
Jan Meyer ◽  
Peter Schegner
Keyword(s):  
Time Domain ◽  
Single Phase ◽  
Low Voltage ◽  
Black Box ◽  
Steady States ◽  
Domain Modeling ◽  
Dynamic Simulations ◽  
Time Domain Modeling ◽  
Artificial Neural ◽  
Grid Side

This paper introduces a new black-box approach for time domain modeling of commercially available single-phase photovoltaic (PV) inverters in low voltage networks. An artificial neural network is used as a nonlinear autoregressive exogenous model to represent the steady state behavior as well as dynamic changes of the PV inverter in the frequency range up to 2 kHz. The data for the training and the validation are generated by laboratory measurements of a commercially available inverter for low power applications, i.e., 4.6 kW. The state of the art modeling approaches are explained and the constraints are addressed. The appropriate set of data for training is proposed and the results show the suitability of the trained network as a black-box model in time domain. Such models are required, i.e., for dynamic simulations since they are able to represent the transition between two steady states, which is not possible with classical frequency-domain models (i.e., Norton models). The demonstrated results show that the trained model is able to represent the transition between two steady states and furthermore reflect the frequency coupling characteristic of the grid-side current.

scholarly journals Single-Phase Multilevel PWM Inverter Based on H-bridge and its Harmonics Analysis

2015 ◽  
Vol 15 (5) ◽  
pp. 1227-1234 ◽  
Author(s):  
Woo-Seok Choi ◽  
Hae-Kon Nam ◽  
Sung-Jun Park
Keyword(s):  
Single Phase ◽  
Pwm Inverter
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