High switching frequency, high efficiency CLL resonant converter with synchronous rectifier

2009 ◽  
Author(s):  
Daocheng Huang ◽  
Dianbo Fu ◽  
F.C. Lee
Keyword(s):  
High Efficiency ◽  
Switching Frequency ◽  
Resonant Converter ◽  
High Switching Frequency ◽  
Synchronous Rectifier

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 Power Factor Corrector Based on Parallel Quasi- Resonant Pulse Converter with Fast Current Loop

2013 ◽  
Vol 3 (1) ◽  
pp. 5-11 ◽  
Author(s):  
Yuriy Denisov ◽  
Serhii Stepenko
Keyword(s):  
Power Factor ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Current Loop ◽  
Switching Frequency ◽  
Zero Current Switching ◽  
High Switching Frequency ◽  
Power Factor Corrector ◽  
Pulse Converter

Abstract The problems, devoted to power quality and particularly power factor correction, are of great importance nowadays. The key requirements, which should be satisfied according to the energy efficiency paradigm, are not limited only by high quality of the output voltage (low total harmonic distortion), but also assume minimal power losses (high efficiency) in the power factor corrector (PFC). It could be satisfied by the use of quasi-resonant pulse converter (QRPC) due to its high efficiency at high switching frequency instead of the classical pulse-width modulated (PWM) boost converter. A dynamic model of QRPC with zero current switching (ZCS) is proposed. This model takes into account the main features of QRPC-ZCS as a link of a PFC closed-loop system (discreteness, sharp changes of parameters over switching period, input voltage impact on the gain). The synthesized model is also valid for conventional parallel pulse converter over an active interval of commutation. The regulator for current loop of PFC was synthesized based on digital filter using proposed model by the criterion of fast acting.

scholarly journals An Extremely High Power Density Asymmetrical Back-to-Back Converter for Aerospace Motor Drive Applications

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1292
Author(s):  
Yifan Zhang ◽  
Chushan Li ◽  
David Xu ◽  
Wuhua Li ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Power Systems ◽  
Power Density ◽  
High Efficiency ◽  
Switching Frequency ◽  
Multilevel Converter ◽  
Voltage Standard ◽  
Voltage Level ◽  
High Switching Frequency ◽  
Higher Power ◽  
Converter Topologies

Higher-voltage-standard and higher-power-rating aerospace power systems are being investigated intensively in the aerospace industry to address challenges in terms of improving emissions, fuel economy, and also cost. Multilevel converter topologies become attractive because of their higher efficiency under high-voltage and high-switching-frequency conditions. In this paper, an asymmetrical-voltage-level back-to-back multilevel converter is proposed, which consists of a five-level (5L) rectifier stage and a three-level (3L) inverter stage. Based on the comparison, such an asymmetrical back-to-back structure can achieve high efficiency and minimize the converter weight on both rectifier and inverter sides. A compact triple-surface-mounted heatsink structure is designed to realize high density and manufacturable thermal management. This topology and structure are evaluated with a full-rating prototype. According to the evaluation, the achieved power density is 2.61 kVA/kg, which is 30% higher than that of traditional solutions. The efficiency at the rated power of the back-to-back system is 95.8%.

scholarly journals Constant-Current, Constant-Voltage Operation of a Dual-Bridge Resonant Converter: Modulation, Design and Experimental Results

2021 ◽  
Vol 11 (24) ◽  
pp. 12143
Author(s):  
Jiaqi Wu ◽  
Xiaodong Li ◽  
Sheng-Zhi Zhou ◽  
Song Hu ◽  
Hao Chen
Keyword(s):  
High Efficiency ◽  
Experimental Tests ◽  
Rechargeable Batteries ◽  
Constant Current ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Constant Voltage ◽  
Switching Loss ◽  
Wide Range ◽  
Modulation Methods

To meet the requirements of charging the mainstream rechargeable batteries, in this work, a dual-bridge resonant converter (DBRC) is operated as a battery charger. Thanks to the features of this topology, the required high efficiency can be achieved with a wide range of battery voltage and current by using different modulation variables. Firstly, a typical charging process including constant-voltage stage and constant-current stage is indicated. Then, two different modulation methods of the DBRC are proposed, both of which can realize constant-voltage charging and constant-current charging. Method I adopts phase-shift modulation with constant switching frequency while Method II adopts varying frequency modulation. Furthermore, as guidance for practical application, the design principles and detailed design procedures of the DBRC are customized for the two modulation methods respectively in order to reduce the switching loss and conduction loss. Consequently, the full soft-switching operation with low rms tank current is achieved under the two modulation methods, which contributes to the high efficiency of the whole charging process. At last extensive simulation and experimental tests on a lab prototype converter are performed, which prove the feasibility and effectiveness of the proposed modulation strategies.

scholarly journals A Si-FET-Based High Switching Frequency Three-Level LLC Resonant Converter

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3082
Author(s):  
Yang ◽  
Han
Keyword(s):  
Optimal Design ◽  
High Performance ◽  
Input Voltage ◽  
Switching Frequency ◽  
Design Consideration ◽  
Resonant Converter ◽  
Switching Losses ◽  
High Switching Frequency ◽  
Llc Resonant Converter ◽  
Resonant Inductor

This paper highlights the proposed silicon field-effect transistor (Si-FET)-based high switching frequency three-level (TL) LLC resonant converter. It provides a detailed operational analysis of the converter; the multilevel (ML) organization of cells; voltage-balancing principles; current-balancing principles; loss comparison between Si-FETs and gallium-nitride (GaN)-FETs; and an optimal design consideration based on loss analysis. This analysis reveals that the switching losses of all power switches can be considerably reduced as the voltage across each switch can be set to half of the input voltage without an additional circuit or control strategy. Moreover, the current of each resonant inductor is automatically balanced by a proposed integrated magnetic (IM)-coupled inductor. Therefore, the operating frequency can be easily increased to near 1 MHz without applying high-performance switches. In addition, the resonant tanks of the converter can be a group of cells for multilevel operation, which indicates that the voltage across each switch is further reduced as more cells are added. Based on the results of the analysis, an optimal design consideration according to the resonant tank and switching frequency is discussed. The proposed converter was validated via a prototype converter with an input of 390 V, an output of 19.5 V/18 A, and a frequency of 1 MHz.

scholarly journals MODELING AND SIMULATION OF LOW VOLTAGE POWER SUPPLY FOR ACTIVE PHASED ARRAY RADAR

2013 ◽  
pp. 198-203
Author(s):  
C.S VIDYALAKSHMI ◽  
CHANNABASAPPA BALIGAR
Keyword(s):  
Modeling And Simulation ◽  
Power Supply ◽  
Phased Array ◽  
High Efficiency ◽  
Low Voltage ◽  
Switching Frequency ◽  
Loop Control ◽  
Mode Control ◽  
Phased Array Radar ◽  
High Switching Frequency

This paper deals with the modeling and simulation of low voltage power supply (LVPS) unit to the ACTIVE PHASED ARRAY RADAR, which is used for sensing different targets at a time. This RADAR system contains flat bank of small identical antennas and huge number of transmitting and receiving modules for electronic scanning. This radar antenna requires power in different levels for various electronic devices. The proposed design of LV power supply will have the ability to manage temperature variations with high efficiency under different loading condition. The closed loop control such as voltage mode control and current mode control are used to regulate the output voltage with high switching frequency of 400khz has been designed. Simulations are performed using MATLAB / SIMULINK software.

scholarly journals Soft Switching of Three-Phase AC to DC CIHRC with Wireless Power Transfer (WPT) Function

2018 ◽  
Vol 9 (3) ◽  
pp. 965
Author(s):  
Rahimi Baharom
Keyword(s):  
Wireless Power Transfer ◽  
Current Injection ◽  
Soft Switching ◽  
Injection Technique ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Power Transfer ◽  
Wireless Power ◽  
High Switching Frequency ◽  
Three Phase

<span lang="EN-US">This paper presents the verification of soft switching condition for three-phase AC to DC current injection hybrid resonant converter (CIHRC) with wireless power transfer (WPT) function. Details on the operation of current injection technique with the lossless zero voltage switching (ZVS) condition on shaping the high power factor of supply current waveforms are presented. With a suitable high switching frequency operation, the proposed resonant converter is capable to operate with ZVS conditions, thus, allowing reduction in the size of inductive and magnetic components. Selected results are also presented to verify the lossless ZVS condition for three-phase AC-DC CIHRC with WPT function.</span>

scholarly journals A Phase-Shift-Modulated LLC-Resonant Micro-Inverter Based on Fixed Frequency Predictive-MPPT

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1460
Author(s):  
Omar Abdel-Rahim ◽  
Nehmedo Alamir ◽  
Mohamed Abdelrahem ◽  
Mohamed Orabi ◽  
Ralph Kennel ◽  
...  
Keyword(s):  
High Efficiency ◽  
Harmonic Distortion ◽  
Maximum Power ◽  
Switching Frequency ◽  
Resonant Converter ◽  
Fixed Frequency ◽  
Pv System ◽  
Partial Shading ◽  
Llc Resonant Converter ◽  
Micro Inverter

Maximum Power Point Tracking (MPPT) control is an essential part of every photovoltaic (PV) system, in order to overcome any change in ambient environmental conditions and ensure operation at maximum power.. Recently, micro-inverters have gained a lot of attention due to their ability to track the true MPP for each individual PV module, which is considered a powerful solution to overcome the partial shading and power mismatch problems which exist in series-connected panels. Although the LLC resonant converter has high efficiency and high boosting ability, traditional MPPT techniques based on Pulse Width Modulation (PWM) do not work well with it. In this paper, a fixed frequency predictive MPPT technique is presented for the LLC resonant converter to be used as the first-stage in a PV micro-inverter. Using predictive control enhances the tracking efficiency and reduces the steady state oscillation. Operation with fixed switching frequency for the LLC resonant converter improves the total harmonic distortion profile of the system and ease the selection of circuit magnetic component. To demonstrate the effectiveness of the proposed MPPT technique, the system is simulated using MATLAB/Simulink platform. Furthermore, a 150 W hardware prototype is developed and tested. Both simulation and experimental results are consistent and validate the proper operation of the developed system.

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