scholarly journals Design of an Isolated Bidirectional Symmetric Resonant Converter

2020 ◽  
Vol 10 (22) ◽  
pp. 8144
Author(s):  
Yih-Her Yan ◽  
Hung-Liang Cheng ◽  
Shun-Yu Chan ◽  
Yu-Da Chen ◽  
Yong-Nong Chang
Keyword(s):  
Conversion Efficiency ◽  
Digital Signal Processor ◽  
Power Conversion ◽  
Digital Signal ◽  
Resonant Converter ◽  
Capacity Design ◽  
Dual Active Bridge ◽  
Reverse Conversion ◽  
Converter Design ◽  
Resonant Mechanism

An isolated type bidirectional resonant converter is presented in this paper. Using a dual active bridge as the main topology and integrating symmetric resonant mechanism, the developed converter features an isolated type bidirectional resonant converter with bidirectional power conversion and electrical isolation capabilities to ensure working security and stability. The application of a symmetric resonant scheme enables the control range of input and output voltages to be widened and achieves soft switching during bidirectional power conversion. A converter design process covering all the bases is exhibited in this work. With the digital signal processor (DSP) TMS320F28335 being employed as the control core, the developed isolated bidirectional resonant converter can effectively handle the power conversion between the simulated 400 V DC grid and the energy storage battery ranging from 280 to 403 V. Based on a 1 kW capacity design, the test data reveal that the forward conversion efficiency from grid to battery can reach 93.25%, and the reverse conversion efficiency from battery to grid is as high as 94.60%.

Design of New Frequency Converter Based on TMS320LF2407A

2012 ◽  
Vol 466-467 ◽  
pp. 809-813
Author(s):  
Zhan Jun Yuan ◽  
Jin Wang
Keyword(s):  
Digital Signal Processor ◽  
Pulse Width Modulation ◽  
Frequency Converter ◽  
Dynamic Performance ◽  
Digital Signal ◽  
Control Precision ◽  
Software And Hardware ◽  
Converter Design ◽  
Utilization Ratio ◽  
High Control

In order to improve voltage utilization ratio and dynamic performance of frequency converter, this paper presents a digital frequency converter design scheme based on digital signal processor TMS320LF2407A and the theory of space vector pulse width modulation (SVPWM) technology, provides its detailed design measures of software and hardware and SVPWM algorithm realization methods. The experimental results prove that this new frequency converter has simple structure, high control precision, higher voltage utilization ratio, better dynamic and static property.

DEVELOPMENT OF SIMPLE FUZZY LOGIC CONTROLLER FOR EXTENDED PERIOD-ZCS/ZVS-QUASI RESONANT CONVERTER: DESIGN, SIMULATION, AND EXPERIMENTATION

2006 ◽  
Vol 15 (05) ◽  
pp. 757-776
Author(s):  
S. ARULSELVI ◽  
UMA GOVINDARAJAN
Keyword(s):  
Fuzzy Logic ◽  
Digital Signal Processor ◽  
Fuzzy Logic Controller ◽  
Computing Time ◽  
Experimental Studies ◽  
Extended Period ◽  
Digital Signal ◽  
Resonant Converter ◽  
Memory Space ◽  
Load Variations

This paper describes the design and implementation of simple fuzzy logic controller (SFLC) for a nonlinear quasi-resonant converter (QRC). It is shown that the two-dimensional rule table of conventional FLCs (CFLCs) used in power converters can be reduced to one-dimensional rule table using SFLC. The proposed SFLC reduces the memory space and computing time of the fuzzy algorithm. The tuning of scaling factors and the generation of fuzzy rules are also easier when compared with CFLC. As a result, realizing SFLC in a Microcontroller or Digital Signal Processor (DSP) is made simple. The proposed controller structure is universal and it can be directly applied to any of the dc–dc converter topologies. In this paper, the application of SFLC is successfully verified for the voltage control of Extended Period (EP)-ZCS/ZVS-QRC through simulation and experimental studies using TMS320F2407A Processor. The ability of SFLC, compared to CFLC, to achieve good transient response for load variations and supply disturbances is demonstrated.

scholarly journals A digital signal processor based capacitor inductor inductor resonant converter for stand alone wind energy system using AC analysis

2021 ◽  
Vol 12 (4) ◽  
pp. 54-62
Author(s):  
C. Nagarajan ◽  
R. Prakash
Keyword(s):  
Wind Energy ◽  
Digital Signal Processor ◽  
Fuzzy Controller ◽  
Supply Voltage ◽  
Experimental Studies ◽  
Digital Signal ◽  
Energy System ◽  
Resonant Converter ◽  
Wind Energy System ◽  
Signal Processor

In this paper the CLL (capacitor inductor inductor) resonant converter (RC) with digital signal processor (DSP) based fuzzy controller for stand alone wind energy system has been estimated and the performance of the converter is analysed. The proposed converter has been analyses with the closed loop condition. The fuzzy controller regulates the output voltage with change of supply voltage and load disturbance are carried out. The controller performance of CLL RC is compared through simulation and experimental studies using TMS320F2407 processor. Keywords: Power electronics, DC-DC power converters, fuzzy control, wind energy system

scholarly journals A Comprehensive Overview in Control Algorithms for High Switching-Frequency LLC Resonant Converter

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4455
Author(s):  
Hwa-Pyeong Park ◽  
Mina Kim ◽  
Jee-Hoon Jung
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Power ◽  
Power Conversion ◽  
Voltage Regulation ◽  
Control Algorithms ◽  
Switching Frequency ◽  
Resonant Converter ◽  
High Switching Frequency ◽  
Llc Resonant Converter

An LLC resonant converter has been widely used in various industrial applications because of its high cost-effectiveness, high power conversion efficiency, simple design methodology, and simple control algorithms using a pulse frequency modulation (PFM). In addition, the soft switching capability of the LLC resonant converter is good to obtain high switching frequency operations, which can get the high-power density of the power converter. Over the past years, several studies have been conducted to improve the performance of a high switching frequency LLC resonant converter with resonant tank design, optimal power stage design, and enhanced control algorithms. This paper is the review paper in terms of the control algorithms for the LLC resonant converter. It focuses on the overview of the high switching-frequency LLC resonant converter in terms of the control algorithms. The advanced control algorithm can improve power conversion efficiency, dynamic performance, tight output voltage regulation, and small electro-magnetic interference. The operational principles of the control algorithms are briefly explained to show their own characteristics and advantages. Thereafter, the research issues for the future works will be discussed in the conclusion.

scholarly journals An Adaptive Synchronous Rectification Driving Strategy for Bidirectional Full-Bridge LLC Resonant Converter

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2298
Author(s):  
Chun-Yu Liu ◽  
Yi-Hua Liu ◽  
Shun-Chung Wang ◽  
Zong-Zhen Yang ◽  
Song-Pei Ye
Keyword(s):  
Digital Signal Processor ◽  
Low Cost ◽  
Digital Signal ◽  
The Body ◽  
Resonant Converters ◽  
Resonant Converter ◽  
Synchronous Rectification ◽  
Llc Resonant Converter ◽  
Source Voltage ◽  
Driving Signal

In this study, an adaptive driving method for synchronous rectification in bidirectional full-bridge LLC resonant converters used in railway applications is proposed. The drain to source voltage of the synchronous rectifier is utilized to detect the conduction of the body diode, and a suitable driving signal for synchronous rectification is generated accordingly. The proposed driving scheme is simple and can be realized using a low-cost digital signal processor (DSP). According to the experimental results, which averaged 0.4625% and 1.097%, improvement can be observed under charging and discharging mode, respectively.

A thiourea additive-based quadruple cation lead halide perovskite with an ultra-large grain size for efficient perovskite solar cells

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21824-21833 ◽  
Author(s):  
Jyoti V. Patil ◽  
Sawanta S. Mali ◽  
Chang Kook Hong
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Inorganic Perovskite ◽  
Halide Perovskite ◽  
Lead Halide

Controlling the grain size of the organic–inorganic perovskite thin films using thiourea additives now crossing 2 μm size with >20% power conversion efficiency.

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