Dual mode modulation method for the full‐bridge converter operating in a wide input voltage range

2016 ◽  
Vol 52 (6) ◽  
pp. 470-471
Author(s):  
Lei Zhao ◽  
Haoyu Li ◽  
Shufeng Liu ◽  
Weihe Zeng
Keyword(s):  
Input Voltage ◽  
Modulation Method ◽  
Dual Mode ◽  
Voltage Range

scholarly journals High Frequency Dual Mode Control LLC Resonant Converter with Wide Input Voltage Range

2016 ◽  
Vol 21 (2) ◽  
pp. 102-110
Author(s):  
Hyung-Ik Joo ◽  
Jung-Woo Yang ◽  
Kang-Ta Jo ◽  
Sang-Kyoo Han ◽  
Suk-Chin Sakong
Keyword(s):  
High Frequency ◽  
Input Voltage ◽  
Resonant Converter ◽  
Dual Mode ◽  
Voltage Range ◽  
Mode Control ◽  
Llc Resonant Converter

A Dual Mode 5-Level Inverter with Wide Input Voltage Range

2019 ◽  
Author(s):  
Yam P. Siwakoti ◽  
Teng Long ◽  
Reza Barzegarkhoo ◽  
Frede Blaabjerg
Keyword(s):  
Input Voltage ◽  
Dual Mode ◽  
Voltage Range

Design Technique of High Power Efficiency LLC DC-DC Converters for Photovoltaic Cells

2018 ◽  
Vol 2 (1) ◽  
pp. 30
Author(s):  
Hisatsugu Kato ◽  
Yoichi Ishizuka ◽  
Kohei Ueda ◽  
Shotaro Karasuyama ◽  
Atsushi Ogasahara
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Photovoltaic Cells ◽  
Input Voltage ◽  
Design Technique ◽  
Load Range ◽  
Voltage Range ◽  
Simulation Results ◽  
Secondary Side ◽  
High Power Efficiency

This paper proposes a design technique of high power efficiency LLC DC-DC Converters for Photovoltaic Cells. The secondary side circuit and transformer fabrication of proposed circuit are optimized for overcoming the disadvantage of limited input voltage range and, realizing high power efficiency over a wide load range of LLC DC-DC converters. The optimized technique is described with theoretically and with simulation results. Some experimental results have been obtained with the prototype circuit designed for the 80 - 400 V input voltage range. The maximum power efficiency is 98 %.

scholarly journals Hybrid DC-DC Converter with Low Switching Loss, Low Primary Current and Wide Voltage Operation

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2536
Author(s):  
Bor-Ren Lin ◽  
Yi-Kuan Lin
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Input Voltage ◽  
Resonant Circuit ◽  
Switching Loss ◽  
Voltage Range ◽  
Current Loss ◽  
Zero Voltage Switching ◽  
Energy Applications ◽  
Multi Stage

A full-bridge converter with an additional resonant circuit and variable secondary turns is presented and achieved to have soft-switching operation on active devices, wide voltage input operation and low freewheeling current loss. The resonant tank is linked to the lagging-leg of the full bridge pulse-width modulation converter to realize zero-voltage switching (ZVS) characteristic on the power switches. Therefore, the wide ZVS operation can be accomplished in the presented circuit over the whole input voltage range and output load. To overcome the wide voltage variation on renewable energy applications such as DC wind power and solar power conversion, two winding sets are used on the output-side of the proposed converter to obtain the different voltage gains. Therefore, the wide voltage input from 90 to 450 V (Vin,max = 5Vin,min) is implemented in the presented circuit. To further improve the freewheeling current loss issue in the conventional phase-shift pulse-width modulation converter, an auxiliary DC voltage generated from the resonant circuit is adopted to reduce this freewheeling current loss. Compared to the multi-stage DC converters with wide input voltage range operation, the proposed circuit has a low freewheeling current loss, low switching loss and a simple control algorithm. The studied circuit is tested and the experimental results are demonstrated to testify the performance of the resented circuit.

scholarly journals Extending the Input Voltage Range of Solar PV Inverters with Supercapacitor Energy Circulation

Electronics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 88
Author(s):  
Kosala Gunawardane ◽  
Nalin Bandara ◽  
Kasun Subasinghage ◽  
Nihal Kularatna
Keyword(s):  
Input Voltage ◽  
Limited Attention ◽  
Solar Pv ◽  
Distributed Energy ◽  
Voltage Range ◽  
Grid Systems ◽  
Dc Line ◽  
Technical Specifications ◽  
Input Range ◽  
Frequency Inverter

Cleaner and greener energy sources have proliferated on a worldwide basis, creating distributed energy systems. Given the unreliable nature of the renewable sources such as solar and wind, they are traditionally based on inverters interfaced with legacy AC grid systems. While efficiency, output waveform quality and other technical specifications of inverters keep improving gradually, only limited attention is given to widening the input range of inverters. This paper presents a new supercapacitor assisted (SCA) technique to widen the input range of an inverter without modifying the inverter itself. Developing a prototype version of a 24 V DC input capable supercapacitor-assisted wide input (SCASWI) inverter using a supercapacitor circulation front end and a commercial 12 V DC line frequency inverter is detailed in the article, explaining how the SCASWI inverter technique doubles the input voltage while maintaining the useful characteristics of the commercial inverter. The new technique has the added advantage of DC-UPS capability based on a long-life supercapacitor module.

Dual-mode dendritic devices enhanced neural network based on electrolyte gated transistors

2021 ◽  
Author(s):  
Zhaokun Jing ◽  
Yuchao Yang ◽  
Ru Huang
Keyword(s):  
Neural Network ◽  
Multilayer Perceptron ◽  
Back Propagation ◽  
Input Voltage ◽  
High Signal ◽  
Neuron Models ◽  
Dual Mode ◽  
Dendritic Processing ◽  
The Neural Networks ◽  
Processing Block

Abstract As a fundamental component of biological neurons, dendrites have been proven to have crucial effects in neuronal activities. Single neurons with dendrite structures show high signal processing capability that is analogous to a multilayer perceptron, whereas oversimplified point neuron models are still prevalent in AI algorithms and neuromorphic systems and fundamentally limit their efficiency and functionality of the systems constructed. In this study, we propose a dual-mode dendritic device based on electrolyte gated transistor, which can be operated to generate both supralinear and sublinear current-voltage responses when receiving input voltage pulses. We propose and demonstrate that the dual-mode dendritic devices can be used as a dendritic processing block between weight matrices and output neurons so as to enhance the expression ability of the neural networks. A dual-mode dendrites-enhanced neural network is therefore constructed with only two trainable parameters in the second layer, thus achieving 1000× reduction in the amount of second layer parameter compared to multilayer perceptron. After training by back propagation, the network reaches 90.1% accuracy in MNIST handwritten digits classification, showing advantage of the present dual-mode dendritic devices in building highly efficient neuromorphic computing.

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