High Efficiency VHF Transmitters Based on Polar Modulator and Enhanced PWM Power Converter

2007 ◽  
Author(s):  
A. Alimenti ◽  
A. Gesano ◽  
P. Nocito ◽  
D. Pezzetta
Keyword(s):  
High Efficiency ◽  
Power Converter

Modeling and Design of High Temperature Silicon Carbide DMOSFET Based Medium Power DC-DC Converter

2010 ◽  
Vol 2010 (HITEC) ◽  
pp. 000144-000151
Author(s):  
Siddharth Potbhare ◽  
Akin Akturk ◽  
Neil Goldsman ◽  
James M. McGarrity ◽  
Anant Agarwal
Keyword(s):  
Silicon Carbide ◽  
High Temperature ◽  
High Efficiency ◽  
Schottky Diodes ◽  
Power Converter ◽  
Electronic Systems ◽  
High Temperature Electronics ◽  
New Material ◽  
Silicon Power Devices ◽  
Relationship Of

Silicon Carbide (SiC) is a promising new material for high power high temperature electronics applications. SiC Schottky diodes are already finding wide acceptance in designing high efficiency power electronic systems. We present TCAD and Verilog-A based modeling of SiC DMOSFET, and the design and analysis of a medium power DC-DC converter designed using SiC power DMOSFETs and SiC Schottky diodes. The system is designed as a 300W boost converter with a 12V input and 24V/36V outputs. The SiC power converter is compared to another designed with commercially available Silicon power devices to evaluate power dissipation in the DMOSFETs, transient response of the system and its conversion efficiency. SiC DMOSFETs are characterized at high temperature by developing temperature dependent TCAD and Verilog-A models for the device. Detailed TCAD modeling allows probing inside the device for understanding the physical processes of transport, whereas Verilog-A modeling allows us to define the complex relationship of interface traps and surface physics that is typical to SiC DMOSFETs in a compact analytical format that is suitable for inclusion in commercially available circuit simulators.

scholarly journals High-Efficiency Bi-Directional Single-Phase AC/DC Converter Design and Field Application for LVDC Distribution

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2191 ◽  
Author(s):  
Juyong Kim ◽  
Hongjoo Kim ◽  
Jintae Cho ◽  
Youngpyo Cho
Keyword(s):  
Distribution System ◽  
Single Phase ◽  
High Efficiency ◽  
Low Voltage ◽  
Control Function ◽  
High Reliability ◽  
Power Converter ◽  
Field Application ◽  
Distribution Grid ◽  
Demonstration Site

This paper describes the design and field application of a high-efficiency single-phase AC/DC converter that is suitable for distribution lines. First, an appropriate AC/DC converter was designed in consideration of the environment of the application system. In order to ensure high efficiency and high reliability, we designed an optimum switching element and capacitor suitable for the converter, and the protection element of the AC/DC converter was designed based on these elements. The control function for the power converter suitable for an LVDC distribution system is proposed for highly reliable operation. The AC/DC converter was manufactured based on the design and its performance was verified during application in an actual low-voltage DC (LVDC) distribution grid through tests at the demonstration site. The application to a DC distribution system in an actual grid is very rare and it is expected that it will contribute to the expansion of LVDC distribution.

Research on Switch Linearity Hybrid Power Converter

2013 ◽  
Vol 336-338 ◽  
pp. 1161-1164
Author(s):  
Wen Hua Hu
Keyword(s):  
High Efficiency ◽  
Power Converter ◽  
Experimental Results ◽  
Hybrid Power ◽  
Load Disturbance ◽  
Linear Load ◽  
Non Linear ◽  
Voltage Follower ◽  
Filter Unit ◽  
Non Linear Load

This paper introduced a voltage follower type of supply hybridized by the switch filter unit with the linear unit, analyzed the principle of the composing, the topology of Switch Linearity Hybrid (SLH) power converter. Theory analyses, simulation and experimental results showed that the SLH power converter possess the character of high efficiency, low THD, the capacity suitable to varied kinds of loads (including non-linear load) and resisting load disturbance.

High Efficiency AC-DC Power Converter using a ModifiedFull-Bridge Circuit

2013 ◽  
Author(s):  
Su-Han Kwon ◽  
◽  
Min-Gi Kim ◽  
Geun-Yong Park ◽  
Doo-Hee Yoo ◽  
...  
Keyword(s):  
High Efficiency ◽  
Bridge Circuit ◽  
Power Converter ◽  
Dc Power

scholarly journals High-efficiency high-current drive power converter IC for wearable medical devices

2015 ◽  
Vol 12 (24) ◽  
pp. 20150953-20150953 ◽  
Author(s):  
Yen-Chia Chu ◽  
Nabi Sertac Artan ◽  
Dariusz Czarkowski ◽  
Le-Ren Chang-Chien ◽  
Jonathan Chao
Keyword(s):  
Medical Devices ◽  
High Efficiency ◽  
Power Converter ◽  
Current Drive ◽  
High Current ◽  
Drive Power ◽  
Wearable Medical

scholarly journals Dual Interleaved LLC Converter for High Power Applications and Wide Load Range

2019 ◽  
Vol 25 (3) ◽  
pp. 4-9
Author(s):  
Michal Frivaldsky ◽  
Jan Morgos ◽  
Andrej Kanovsky
Keyword(s):  
High Power ◽  
High Efficiency ◽  
Negative Impact ◽  
Power Converter ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Load Range ◽  
High Switching Frequency ◽  
Llc Resonant Converter ◽  
Operational Range

Dual interleaved LLC resonant converter with half bridge topology of main circuit characterized by high switching frequency (500 kHz), high power density (60 W/inch3) and high efficiency (above 96 %) over entire operational range (20 %–100 %) is described. Focus was given on the practical design of power converter, which will be able to fulfil requirements on wide load range operation characterized by upcoming normative. Since proposed topology is based on dual interleaved LLC converter, the resonant component´s critical tolerance was also investigated to secure reliable and optimal operational point. Consequently, proposals for elimination of intolerance negative impact are also described. The results of theoretical analysis were verified directly through experimental measurements. Experimental results are finally compared with upcoming industrial standard 80 Plus Titanium.

scholarly journals Efficiency Maximization of Grid-Connected Tidal Stream Turbine System: A Supervisory Energy-Based Speed Control Approach with Processor in the Loop Experiment

2021 ◽  
Vol 13 (18) ◽  
pp. 10216
Author(s):  
Youcef Belkhier ◽  
Nasim Ullah ◽  
Ahmad Aziz Al Alahmadi
Keyword(s):  
Fuzzy Logic ◽  
Closed Loop ◽  
Fuzzy Logic Controller ◽  
High Efficiency ◽  
Reactive Power ◽  
Control Method ◽  
Speed Control ◽  
Power Converter ◽  
Convergence Criterion ◽  
Dc Voltage

Permanent magnet synchronous generator (PMSG) with a back-to-back power converter is one of the commonly used technologies in tidal power generation schemes. However, the nonlinear dynamics and time-varying parameters of this kind of conversion system make the controller computation a challenging task. In the present paper, a novel intelligent control method based on the passivity concept with a simple structure is proposed. This proposed strategy consists of passivity-based speed control (PBSC) combined with a fuzzy logic method to address the robustness problems faced by conventional control techniques such as proportional-integral (PI) control. The proposed method extracts the maximum power from the tidal energy, compensates for the uncertainty in a damped way where the entire dynamics of the PMSG are considered when designing the control law. The fuzzy logic controller is selected, which makes the proposed strategy intelligent to compute the damping gains to make the closed-loop passive and approximate the unstructured dynamics of the PMSG. Thus, the robustness property of the closed-loop system is considerably increased. The regulation of DC voltage and reactive power to their desired values are the principal objectives of the present work. The proposed method is used to control the machine-side converter (MSC), while a conventional PI method is adopted to control the grid-side converter (GSC). Dynamic simulations show that the DC voltage and reactive power errors are extremely reduced with the proposed strategy; ±0.002 for the DC-link voltage and ±0.000015 in the case of the reactive power. Moreover, the lowest steady-state error and better convergence criterion are shown by the proposed control (0.3 × 10−3 s). Generally, the proposed candidate offers high robustness, fast speed convergence, and high efficiency over the other benchmark nonlinear strategies. Moreover, the proposed controller was also validated in a processor in the loop (PIL) experiment using Texas Instruments (TI) Launchpad.

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