The power supply employs full bridge resonant llc with phase shift operating at ramp up. Simple high efficiency full bridge dcdc converter using a series resonant capacitor 710 j electr eng technol. Stevaldpsllck1 3 kw full bridge llc resonant digital power. The switching topology used for the full bridge converter is the bipolar voltage switching, where. The performance advantages of an llc resonant converter make this design approach an excellent choice for increased energy efficiency in medium to highpower telecom applications. An1477, digital compensator design for llc resonant converter. Seriesparallel resonant converter operating in discontinuous. The model simulation of resonant converter is carried out and implemented by utilizing the matlabsimulink software using the factors enlisted in table 1. This configuration is referred to as an lcl resonance full bridge converter. Tamilarasan5 1,2,3,4 ug students, department of electrical and electronics engineering, valliammai engineering college. Zvs auxiliary circuit for a 10 kw unregulated llc fullbridge. Currentfed resonant fullbridge boost dcacdc converter. The converter consists of a full bridge mosfet bridge, a resonant tank represented by the lr inductor and cr capacitor block, a full bridge rectifier and an output filter co. Ananlysis and design of llc resonant converterananlysis and.
The commonly used dcdc converter in the power supply unit psu for data centers and telecom applications are full bridge phaseshift converters since they meet the demands of high power and ef. The topologies commonly used in the highvoltage end of the llc resonant converter are the half bridge and full bridge, whereas those used in the lowvoltage end are the full bridge or center tap. Get to know the llc resonant converter with sync rectifier. A series resonant full bridge converter src modified by adding an inductor in parallel with the transformer primary is presented. Use fundamental approximation and ac simulation in any simulation software like pspice, icap4 etc r ac is the parameter. The converter uses a nonlinear saturating inductor and a 3 pole, 2 zero compensator with all compensator values calculated in the f11 window. A simple design and simulation of full bridge llc resonant. Operation and design 4 application note an 201209 v1. The switching losses in the converters can be reduced by the following methods. Denget al design methodology of llc resonant converters for ev battery chargers 1583 fig. Llc resonant converter the square waveform generated by the input full bridge is applied to the resonant tank formed by l m, c r, l r. Wolfspeed sic 20 kw llc reference design crd20dd09p2. Modeling and simulation of fullbridge series resonant.
Their selection will impact these converter characteristics. The full bridge resonant converter voltage had been regulated through the phase shift control. Tida00381 360w phase shift full bridge resonant llc with high. Design considerations for a half bridge llc resonant converter. When the relay switch, sw r was changed from opened to closed, the secondaryside of the proposed converter was changed from a full bridge rectifier to a full bridge voltage doubler rectifier. The converter differs from the series resonant converter because it is the tank capacitor voltage, rather than the tank inductor current, which is rectified and filtered to produce the dc load voltage. The llc converter is implemented with a full bridge on the primary side and a full bridge rectifier on the secondary side. The converter consists of a switching bridge halfbridge mosfet, an llc resonant circuit, a fullbridge rectifier and an output filter co. Resonant llc half bridge dc dc converter software design. The converter consists of a switching bridge half bridge mosfet, an llc resonant circuit, a full bridge rectifier and an output filter co. Optimal design of digital control system for llc resonant. Here then, a design procedure is proposed that assunmes the converter is operated about a specified resonant frequency for a given load and gain. The resonant tank gain can be derived by analyzing the equivalent resonant. Simulation of the llc resonant converter is performed in matlab.
The stevaldpsllck1 is a digitally controlled 3 kw full bridge llc resonant dcdc converter with output synchronous rectification. The aim is to provide a converter design to reduce tank. Tida00381 360w phase shift full bridge resonant llc with. What are the challenges in full bridge llc resonant converter. When designing a halfbridge llc, the resonant capacitor can be split between the. A costeffective design and analysis of full bridge llc. This paper introduces a design of a dc to dc converter for hybrid energy storage system that consists of battery and supercapacitor. Softswitching characteristics were achieved by using full bridge llc resonant which reduced the component losses and allowed the power switches to. Llc resonant converter design using mc56f82748, design reference manual, rev. Design of llc resonant dcdc converter in closed loop configuration with pulse analog control schemes. The llc converter is a resonant inverter with 3 reactive elements where dc input voltage is turned into a. Duerbaum friedrichalexanderuniversitat erlangennuremberg cauerstra. This reference design demonstrates the implementation of a llc resonant converter using mc56f83783 or mc56f82748 digital signal controllers dsc.
The half bridge converter used here to stepup the input. Classically, fully resonant converters have had a nominal disadvantage in conduction losses compared with. Jumpstart your design with proven hardware and software solutions. Llc resonant full bridge converter with 1200 v40 a igbts, and its efficiency comparison. Section 2 presents the important operating modes of the converter, design criteria for llc resonant converter are described in section 3 and section 4 presents simulation results. The fullbridge converter using mosfet switches s 1 s 4 drives the input port of the resonant network with highfrequency. Dec 03, 2018 zvs zero voltage switching to reduce switching loss, improve efficiency, reduction in heating loss, resonant tank, download psim software. The circuit diagram of fullbridge lclt rc is shown in fig. Hello, supposing that one has a wide output voltage range, then is it better to use a full bridge llc converter than a half bridge llc converter.
Transistors t 1 and t 4 are considered as one switch pair and transistors t 2 and t 3 are considered as the other switch. Where the switching bridge gain is 1 for a fullbridge and 0. Learn more about simulation of fullbridge llc resonant converter. A phase shiftedzero voltage switching pszvs full bridge dcdc converter fbdcc over a wide load variation is proposed. Design and experimental evaluation of a singlestage acdc. In order to design a suitable digital compensator, the large signal and small signal models of the llc resonant converter are derived using the edf technique. Llc resonant converter half bridge circuit diagram. An oscillator is builtin allowing designers to set the suitable operation frequency range with a resistor. The fully digital design of llc resonant converter based on hvpllc. Jun 27, 2019 a synchronous rectifier is implemented over the traditional full wave rectifier for improved efficiency. Stevaldpsllck1 3 kw full bridge llc resonant digital. I want to simulate the full bridge llc resonant circuit. Ananlysis and design of llc resonant converterananlysis.
The resonant tank gain can be derived by analyzing the equivalent resonant circuit. Designing an llc resonant halfbridge power converter article. The llc converter is a resonant inverter with 3 reactive elements where dc input voltage is turned into a square wave by a switch network arranged as either a half or full bridge. Llc resonant converters increase efficiency in dctodc. High power conversion efficiency and low switching losses are the essential need for dcdc converters used in power industries nayak and reddy, 2011. If in the typical converter design the output diode is short circuited, the load on the switch is reduced to the leakage inductance, which is typically 30. The dspic33f gs family series of digital signal controllers dscs was introduced by microchip technology inc.
Sic mosfets in a 4lto247 package in a full bridge resonant llc circuit. Fullbridge quarter brick dcdc converter reference design. Tsinghua university, 2007 a dissertation submitted in partial fulfillment of the requirements for the degree of doctor of philosophy in the department of electrical engineering and computer science in the college of engineering and computer science. What a quasiresonant converter does for you ee times. In combination with hvpkv46f150 controller card, it provides a readymade software development platform for 250 watt power supply with input voltage 390 v dc and 12 v21 a output. The full range of protection features have been kept. The kit consists of a power board, digital control board, adapter board, and firmware modules. Design and implementation of pszvs full bridge converter. This fixed frequency synchronous buck converter is taken from the simplis tutorial. This paper provides a detailed practical design aspect of full bridge llc resonant converter. Order samples, get tools and find more information on the ti products in this reference design. Design curves for the converter gain and other component stresses are presented in normalized form. System overview the block diagram of the proposed current fed resonant full bridge boost dcacdc converter is shown.
This reference design is implemented using a single dspic33ep dspic33fj gs digitalpower dscs from microchip that provides the full digital. Abstract a fullbridge llc resonant converter with seriesparallel connected transformers for an onboard. Analysis and design optimization of resonant dcdc converters. To avoid a transformer, these demands result in the design of a third order resonant circuit with switchable passive devices. Phaseshifted full bridge dcdc power converter design guide abstract the phase shifted full bridge psfb converter is used for dcdc conversion in various applications, for example in telecom systems to convert a high voltage bus to an intermediate distribution voltage, typically closer to 48v.
The hvpllc development board is an integral part of nxp highvoltage platform. The control system design of resonant converters is different from the conventional fixed frequency pulsewidth modulation pwm converters. In addition, to enhance the outcome of a control system, several improved techniques through adaptive controls had been reported 25, which include the passivitybased. The proposed converter is designed for high efficiency, small size and low switching stress also for no load to wide load variations. A simple design and simulation of full bridge llc resonant dc. Rapiddesign lcc currentoutput resonantconverters with. This llc converter converts a 380v dc input to a 24v output at 120w. Basically, full bridge inverter brings can operate well with higher input current as. Design methodology of llc resonant converters for electric. A software program is written and is fed to the pic controller pic16f72 for the implementation. It includes explanation of llc resonant converter operation principle, designing the transformer and resonant network, and selecting the components. The various graphswaveforms are analyzed and studied on digital storage oscilloscope. What is the best software for simulation of power electronic projects.
Design of a 600 w hb llc converter using 600 v coolmos. An intuitive approach to the design of the power elements of a resonant llc converter. It feeds the resonant llc tank that filters out harmonics providing a sinusoidal like voltage and current waveform. The llc converter is implemented with a full bridge on the primary side and a fu l bridge rectifier on the secondary side. Ac analysis of resonant converters using pspice a quicker. Embedded control of lcl resonant converter analysis. Halfbridge llc resonant converter design using fsfrseries fairchild. The power supply employs full bridge resonant llc with phase shift operating at ramp up, light load, low output voltage. This paper deals with the design and simulation of full bridge llc resonant converter suitable for photovoltaic applications. Jan 17, 2017 simulation of full bridge llc resonant converter. Simulink and the practical prototype setup is analyzed in proteus software. Llc resonant mode controller infineon technologies. Analysis and design optimization of resonant dcdc converters by xiang fang b.
The full bridge dcdc converter with the llc resonant network has been tested under hard. This design uses the c2000 microcontroller tms320f280049 along with siliconcarbide sic driver ucc21530q1 to drive bridges both on primary and secondary sides. The dcdc llc resonant converter reference design utilizes microchips digital power conversion dspic for unique adaptive control of the half bridge converter and synchronous rectifier. Microchips 200w dcdc llc resonant converter reference design. Resonant llc halfbridge dcdc converter software design guide. Llc resonant half bridge converter employing fsfrseries fps.
Pdf design and analysis of a full bridge llc dcdc converter for. Design and analysis of a full bridge llc dcdc converter for. The small signal modeling technique based on the generalized state space averaging method is applied to single phase full bridge resonant dcdc converter. Phaseshifted full bridge dcdc power converter design guide. The dc characteristics of llc resonant converter is shown in the figure. This example circuit uses scripting to determine the minimum magnetics ratio of magnetizing resonant, ln lmlr, to provide the desired gain and output power of an llc resonant converter. Resonant lcc converter for lowprofile applications a. Ac equivalent circuit of the llc resonant converter. That is why softswitched topologies offer a good tradeoff between efficiency and volume, such as with llc converters, which are widely used in. The dcdc llc resonant converter reference design utilizes microchips digital power conversion dspic for unique adaptive control of the halfbridge converter and synchronous rectifier. Connecting snubbers, resonant converters and soft switching converters redl et al. Analysis and design of resonant dcdc converters for. In an llc resonant converter, all semiconductor switches are softswitching, or zerovoltage switching. With the designed values of llc resonant dcdc converter, the closed loop configuration with pulse analog control schemes like ppm and pwm are designed and presented with psim 6.
The equations are solved using the promatlab software. A full bridge isolated version of the parallel resonant converter is given in fig. A full bridge highfrequency link series parallel resonant converter sprc operating in discontinuous current mode is analyzed using the statespace approach. Schematic and basic waveforms for hb llc converter operating at resonant frequency. The step by step design procedure explained with a design example helps design the llc resonant converter. The purpose of this project is to design an isolated dcdc converter for hev application, a. According to the simulation, the frequency characteristic curve is obtained from matlab, this paper analyzes the influence of the duty ratio, input voltage to frequency characteristics, then builds a closed loop simulation circuit with psim. Learn more about simulation of full bridge llc resonant converter.
This is why we offer the ebook compilations in this website. Ice1hs01g1 resonant mode converter, housed in a dso8 package, is an easyto design component to realise a llc hb resonant application. Simple high efficiency fullbridge dcdc converter using a. Fullbridge llc resonant converter u10 6 k10 3 n10 9 p10 12 ctrical specifications. Consider, for example, the need for the overcurrent shutdown latch. A conventional zvs full bridge dcdc converter exploits. I say this because the q is lower for a given load when a full bridge llc is used. Application note an1160 design of resonant half bridge converter using irs27951,2 control ic by helen ding table of contents 1. This example shows the operation of a resonant llc converter. Additionally, selecting an appropriate llc resonant converter architecture can further optimize the e ciency and reduce component stress 911.
Sic mosfets in a 4lto247 package evaluate converter level efficiency and power density gains when using the new v, 65 m. Design of an igbtbased lclresonant inverter for high. A seriesparallel resonant converter for electrochemical wastewater treatment kathryn m. Figure 1 shows the two feasible solutions for the inverter and the resonant circuit. Unlike the slr converter, the llc converter can keep the output voltage regulated even under light load condition. Optimal design of digital control system for llc resonant converter.
In addition, ice1hs01g1 offers a programmed softstart function to limit both the inrush current and the overshoot in output voltage. Simulation of fullbridge llc resonant converter matlab. A three element lcl resonance full bridge converter. This operating mode can replace pwm operating mode in llc, which can improve efficiency signficantly in light load. Download ebook resonant llc half bridge dc dc converter software design guide resonant llc half bridge dc dc converter software design guide when somebody should go to the ebook stores, search launch by shop, shelf by shelf, it is in point of fact problematic.
Javascript must be enabled to view full functionality of our site. Highfrequency llc resonant converter with gan devices. Design considerations for a half bridge llc resonant. This topology combines the advantages of pulsewidth modulation pwm control and resonant conversion. The llc resonant circuit reduces switching loss through zerovoltage switching zvs. And that surely means that the full bridge llc can manage a wider output voltage range. Llc converter has several desired features such as high efficiency, low electromagnetic interference emi and high power density.
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