full bridge llc resonant converter design

Based on selected m and calculated max. Key benefits and features of the 3kW LLC include: At the same time, the Excel file that shows the results of different Q_rated and K_ind is generated automatically as shown in Fig. After files are unpacked, a template circuit will be displayed as shown below. It also makes sure that both buck and boost regions of the resonant tank are covered with unity gain at the resonant frequency. The power supply employs Full Bridge Resonant LLC with phase shift operating at ramp up, light load, low output voltage. Figure 7: Simulation results at the minimum output voltage (400V) and rated input voltage (700V) at K_rel_freq = 1.196 @239.2kHz (above resonant mode). In a full-bridge switching circuit, we have 4 MOSFETs, while a half-bridge switching circuit has 2 MOSFETs. A fully assembled board has been developed for testing and performance validation only, and is not available for sale. 3 Design Equations The following are design equations for the LLC converter, including a design example using Half Bridge front- Shanmugam2, S. 3Sulthan Allaudeen , M. Suryaprakash4, P. Tamilarasan5 1,2,3,4 UG Students, Department of Electrical and Electronics Engineering, Valliammai Engineering College, LLC converter has several desired features such as high efficiency, low electromagnetic interference (EMI) and high power density. See the important notice and disclaimer covering reference designs and other TI resources. The STEVAL-DPSLLCK1 from STMicroelectronics is a digitally-controlled 3kW full-bridge LLC resonant dc-dc converter with output synchronous rectification. This operating mode can replace PWM operating mode in LLC, which can improve efficiency signficantly in light load. Found inside – Page 131(a) Non-isolated multi-channel interleaved buck converter. (b) Phase-shifted ZVS full bridge converter. (c) Half-bridge LLC resonant converter 4.3.4.3 Half-Bridge LLC Resonant Converter Another option to enable the fast-charging ports ... For operations below the resonant frequency with a dc gain of more than 1, the secondary diodes will operate in the discontinuous current mode, ensuring that there is no reverse recovery problem. A 3kW LLC resonant converter is a full-bridge LLC resonant converter, the GS-EVB-LLC-3KW-GS Evaluation Board achieves a power density of above 100W/inch 3 and a power efficiency of greater than 96%. The full-bridge LLC resonant converter design, integrating GaN Systems' 650 V E-mode transistors, exceeds the 80 PLUS Titanium standard for power supply units, achieving high power density (AC/DC PSU) above 100W/inch 3 and high efficiency of more than 96 percent. Instrumental to this technique is the use of the parasitic elements of the . The upper highlighted portion shows the variation in relative frequency factor (K_rel_freq) from maximum to minimum for each entered K_ind (from 3 to 7) at Q_rated = 0.3. Figure 2: Design Curves with Q_rated = 0.3, K_ind = 3 to 7 with a step size of 1 in the top panel and G_dc_max =Vo_max/(Vi_min*a_sp) = 1.24. Resonant Converters • International Electrotechnical Commission definition: • Resonant converter: • converter using (a) resonant circuit(s) to provide commutation or to reduce switching losses • Today's design examples: • Full bridge LLC dc- dc converter • P = 3.3 kW • V in = 400 V • V out = 250-450 V • Half-bridge LLC dc-dc . Found inside – Page 386... +– C r L r L m C O V0 Vin S2 B Resonant tank D 2 D4 Battery S4 pack Figure 13.1 Full‐bridge LLC resonant converter. ... Exact analysis of LLC resonant converters [13] ensures accuracy, but cannot be easily used to get a handy design ... These templates also incorporate two user-friendly design tools below for optimal and robust design. network in a resonant converter, this paper will only focus on resonant converters with switch networks that generate pulsating voltages. The kit consists of a power board, digital control board, adapter board, and firmware modules. Found inside – Page 74Cyclicaveraging for high-speed analysis of resonant converters, IEEE Transactions on Power Electronics, Vol. 18, No. 4, July 2003,985–993, ISSN: 0885-8993 Fujita, H. & Akagi, H. (1996). Pulse-density-modulated power control of a 4 kW, ... From the Excel file in Figure 4, one can find Q_rated = 0.75 and K_ind = 4 provide a narrower range of frequency variation, lower circulating current and lower turn-off current as compared to other conditions. Figure 5: Simulation results at the rated output voltage (500V) and rated input voltage (700V) at K_rel_freq = 0.9247 @185kHz (below resonant mode). This application note describes how to design an optimized resonant LLC power converter for a 3.3kW EV on‐board charger with the Full‐bridge Resonant LLC template. 20kW LLC hardware uses the latest Cree 1000V SiC MOSFETs in the 4L-TO247 package. The transformer turns ratio is calculated so that the maximum and minimum dc gain requirement for the resonant LLC tank can be determined. The above resonant relative frequency is restricted here at 2 for practical design reasons. If you have questions about quality, packaging or ordering TI products, see TI support. Found inside – Page 452Thus, this converter should be designed to operate in DCM, or BCM. 13.4.2.6 Full-Bridge LLC Resonant DC–DC Converter Figure 13.16 illustrates a full-bridge LLC resonant converter. The LLC resonant converter is widely used in the telecom ... Found inside – Page 449Implementation of resonant converters instead of the hard switching half-bridge topologies seems to be an ... Both LLC and LCC converters can deliver low noise and ZVS of the inverter switches over the whole range of operation ... TEA2016 LLC Resonant Converter Design Tool. If you have questions about quality, packaging or ordering TI products, see TI support. LLC Converter Design 5 Design Note AN 2013-03 V1.0 March. Includes TI products in the design and potential alternatives. Content is provided "as is" by TI and community contributors and does not constitute TI specifications. This is traditional Q, not the equivalent Q used in AN-6104. Test results for the reference design, including efficiency graphs, test prerequisites and more, Detailed schematic diagram for design layout and components, Complete listing of design components, reference designators, and manufacturers/part numbers, Design file that contains information on physical board layer of design PCB. Enter the selected parameters Q_rated = 0.75 and K_ind = 4 in the parameter panel and click on Update Parameter File to obtain all designed parameters for resonant LLC power converter. full bridge and half-bridge resonant converters [4]. To illustrate the process, we will take the full-bridge resonant LLC converter for 400V/48V telecom power supplies application as an example in this tutorial. This reference design is a 6.6 kW, bi-directional, dual-active-bridge resonant converterdesign that allows 380 VDC to 600 VDC input and 280 VDC to 450 VDC output. In PSIM, go to Design Suites >> Power Supply Design Suite, and select Full-bridge Resonant LLC. The GS-EVB-LLC-3KW-GS Evaluation Board and Reference Design. increased interest in resonant topologies, particularly the LLC resonant converter. In PSIM, go to Design Suites >> Power Supply Design Suite, and select Full‐bridge Resonant LLC. Found inside – Page 39Highlighted in this chapter were existing applications, such as point-of-load converters, Class-D audio ... B., Liu, W., Liang, Y., Lee, F.C., and Wyk, J.D. (2006) “Optimal design methodology for LLC resonant converter,” Applied Power ... LLC resonant converter was reported in many papers recently because of its simple structure, high efficiency and high switching frequency ability. The kit consists of a power board, digital control board, adapter board, and firmware modules. Found inside – Page 451Park, H.P., Jung, J.H.: Modeling and feedback control of LLC resonant converters at high switching frequency. ... high-efficiency method to suppress transformer core imbalance in digitally controlled phase-shifted full-bridge converter. This operating mode can replace PWM operating mode in LLC, which can improve efficiency signficantly in light load. Full bridge LLC transformer/resonant choke combo targets EV inverter apps. Dynamic mode switching between frequency modulation to phase modulation, Maintains ZVS over a wider operating range, Enhanced monotonic control of the output over a wider operating range. IRS2795 Power Loss Calculation 6. CONVERTER TOPOLOGY The DC-to DC converter being proposed consists of a full bridge inverter whose input is the DC voltage, nominally of 100 V. Following it is the LLC resonant tank consisting of an f_res = 200 kHz. for an LLC Resonant Converter Hangseok Choi Power Conversion Team. Under DAB converters, the converter can be classified on the basis of model or . This reference design is implemented using a single dsPIC33EP / dsPIC33FJ "GS" digital-power DSCs from Microchip that provides the full digital . Found inside – Page 322Advantage of this method is, that it can be used for every type of power converter. ... two transistors in upper or lower leg of fullbridge converter are switched simultaneously, whereby switching frequency and duty cycle are constant. Found inside – Page 12-91Bhat, A. K. S., Analysis and design of a seriesparallel resonant converter with capacitive output filter, ... King, R. J. and Stuart, T. A., Modeling the fullbridge seriesresonant power converter, IEEE Transaction on Aerospace and ... In Fig. Full Bridge vs. Half Bridge Switching. Power Supplies Product Type. 2013 Key waveforms Figure 2.1: Schematic and basic waveforms for HB LLC converter operating at resonant frequency. K_ind = 4, Q_rated = 0.2 to 0.9 with step size of 0.2 in the bottom panel. For practical consideration, asp=2/3 is considered so that secondary to primary side turns ratio can be taken in the proportion of 2:3. No results found. Found inside – Page 654Kim BC, Park KB, Kim CE, Lee BH, Moon GW (2010) LLC resonant converter with adaptive link-voltage variation for a ... JM (2015) Offline soft-switched LED driver based on an integrated bridgeless boost–asymmetrical half-bridge converter. The design implements the daughter card approach to the C2000 controller (TMDSCNCD280049C) and SiC drivers (PMP21553 and PMP21561) and applies a Rogowski coil for synchronous rectifier (SR) optimization along with high bandwidth OpAmp LMV116MF. Found inside – Page 9-33“Design considerations for high‐voltage high‐power full‐bridge zero‐voltage‐switched PWM converter,” Proc. ... “Using LLC resonant converter for designing wide‐range voltage source,” IEEE Trans. Ind. Electron., vol. 58, no. 5, pp. The DC/DC LLC Resonant Converter Reference Design utilizes Microchip's digital power conversion dsPIC for unique "adaptive" control of the half-bridge converter and synchronous rectifier. The The Design Suite can be used for the design and optimization of the LLC resonant tank in various power conversion applications. The LLC converter is implemented with a full-bridge on the primary side and a fu l-bridge rectifier on the secondary side. As a result, resonant LLC converters are widely considered for dc-dc converters when there is variation in voltage on the input side and output side. In this converter, two same small transformers are employed instead of the single transformer in the traditional LLC resonant . DC to DC Single Output Power Supplies . In PSIM, go to Design Suites >> Power Supply Design Suite, and select Full-bridge Resonant LLC. The primary side stage of LLC resonant converter can be built as a full-bridge or half-bridge type and the output stage can be implemented as a full-bridge or center tapped rectifier configuration with capacitive output filter. The SL-DPSLLKCK1 is a digitally controlled full bridge LLC resonant DC-DC converter with output synchronous rectification. Found inside – Page 92J, Deng, S. Li, S. Hu, C.C. Mi, R.Ma, Design methodology of LLC resonant converters for electric vehicle battery chargers. ... D.S. Gautam, F. Musavi, W. Eberle, W.G. Dunford, A zero voltage switching full-bridge dc-dc converter with ... LLC converter has several desired features such as high efficiency, low electromagnetic interference (EMI) and high power density. 3 Design Equations The following are design equations for the LLC converter, including a design example using Half Bridge front- Design of Full-Bridge Resonant LLC Converter. This design uses the C2000 micro-controller TMS320F280049 along with silicon-carbide (SiC) driver UCC21530-Q1 to drive bridges both on primary and secondary sides. The Steady State Tool and the Design Curve Tool provide the necessary information for quick design iteration and optimization, and to ensure that the converter operates in soft switching throughout the entire input/output voltage range. Infineon ICE2HS01G is a high performance resonant mode controller designed especially for high efficiency half-bridge or full-bridge LLC resonant converter with synchronous rectification at the secondary side. LLC Resonant Half Bridge Converter Operation 3. Fig. Series connected MOSFETs in a half-bridge configuration Compared with the traditional pulse frequency modulation (PFM) controlled . In particular, the conventional full-bridge LLC resonant converter has an inherent entire-range zero-voltage switching (ZVS) characteristic with a low turn-off current of the primary switches [25 . resonant transition of the right hand leg of the converter. Note: The key idea in the optimization process of the resonant converter design is to find the optimum value of Q_rated and K_ind that will provide the narrow range of variation in operating frequency. Select the secondary to primary transformer turns ratio (asp) as shown below: Note: Calculating asp this way ensures a well-balanced operation of the resonant LLC converter for both below and above resonant frequency regions and for low circulating current. This reference design is a 6.6 kW, bi-directional, dual-active-bridge resonant converterdesign that allows 380 VDC to 600 VDC input and 280 VDC to 450 VDC output. Found inside – Page 20The input ranges, the power quality of the suggested battery charger design is enhanced and the LLC resonant inverter has its parameters closer to the configuration of a basic low push pull converter. The above-mentioned converter works ... 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The full-bridge LLC resonant converter design, integrating GaN Systems' 650 V E-mode transistors, exceeds the 80 PLUS Titanium standard for power supply units, achieving high power density (AC/DC PSU) above 100W/inch 3 and high efficiency of more than 96 percent. See the important notice and disclaimer covering reference designs and other TI resources. One can find the detailed results under the variation of input and output conditions by using the Steady State Solver or Design Curve Tool. The inductance ratio of the series and parallel resonant inductors is designed according to the voltage gain and input power factor of the LLC resonant tank. TEA2017 LLC Converter Design Tool. Figure 1. Based on the 20kW DC/DC converter specification above, a resonant full‐bridge resonant LLC circuit is selected with a full‐bridge secondary diode rectifier. The operation of the LLC converter is complicated due to its multiple resonant stage mechanism. A hybrid series resonant, full bridge converter [6] achieved the zero voltage switching (ZVS) turn-on and turn-off operations by The full paper offers a design pro cedure of the resonant LLC converter usi ng a new DCM model of th e output rectifier. With above parameters, the range of Q is from 6 (Full load) to 0 (No load). PREMO releases the new 11kW 3DPower solution, a Full Bridge LLC Transformer 150 µH + Resonant Choke 25 µH merged in 1 single unit. Ls = (Q_rated*Ro_rated_pri)/(2*pi*f_res) = 1.6202e-05 H resonant transition of the right hand leg of the converter. In practical design, Ls should be the sum of the leakage inductance (L_lk) of the transformer and resonant series inductance (L_res). The topology is an integration of a half-bridge (HB) LLC circuit and a full-bridge (FB) LLC circuit. Please clear your search and try again. With an input voltage range of 380 Vdc - 420 Vdc and integrating GaN System's 650V E-mode transistors, the full-bridge LLC resonant converter exceeds the 80 PLUS Titanium standard for power supply units. Found inside – Page 332.1.5.5 E. LLC Resonant Converter A typical LLC converter is shown in Figure 2.12, where a load is attached; Lr and Cr are the ... for certain applications, and the design of these devices was, until the early 1990s, largely empirical. The parameter file (as shown in figure 1) on the left of the schematic also calculates parameter values of transformer turns ratio, resonant components values, load resistance value, filter capacitance value, etc. Vo_rated = 500V; Vo_min = 400V; Vo_max = 550V II. Found inside – Page 219Aigner, H., Dierberger, K., Grafham, D., 1998, “Improving the Full-Bridge PhaseShift ZVT Converter for ... J., Zheng, T.Q., Yang, J., 2017, “A Modified Gain Model and the Corresponding Design Method for an LLC Resonant Converter”, ... Found inside – Page 1-75The full-bridge LLC resonant converter (Figure 1.73) is widely used in telecom industry for the benefits like high efficiency at resonant frequency. But unlike the telecom sector, EV applications require a wide operating range. After files are unpacked, a template circuit will be displayed as shown below. Found inside – Page 7845 Conclusion This paper focuses on the digital control design of low-voltage high-current power supply for ... [2] M. Yu, D. Sha, X. Liao, Hybrid phase shifted full bridge and LLC half bridge DC-DC converter for low-voltage and ... Found inside – Page 244'Buck quasi resonant converter operating at constant frequency: Analysis, design and experimentation'. ... Jin K, Ruan X. 'Hybrid Full-Bridge Three-Level Llc Resonant Converter-A Novel Dc–Dc Converter Suitable For Fuel-Cell Power ... Input can range from 380 to 420 VDC, with output at 54V and a full load current of 55A. Pre-built design templates are provided for full-bridge and half-bridge resonant LLC converters. Figure 4: The generated Excel file for relative frequency (K_rel_freq_min and K_rel_freq_max) at Q_rated = 0.6, K_ind variation from 3 to 7. The detailed design method is given. 2 System description 2.1 System structure LLC is an isolated buck-boost converter, and the isolation between the primary and secondary side is formed by transformer. ZVS at the turn-on and low turn-off currents of the MOSFETs in this converter makes the switching loss negligible, so, the switching frequency . This paper proposes a dual-bridge (DB) LLC resonant converter for wide input applications. Design procedure LLC Converter Design 5 Design Note AN 2013-03 V1.0 March. This design uses the C2000 micro-controller TMS320F280049 along with silicon-carbide (SiC) driver UCC21530-Q1 to drive bridges both on primary and secondary sides. The analysis and design of a full bridge LLC resonant converter appropriate to a fuel cell used in electrical vehicle, which has various required aspects such as high efficiency, low electromagnetic interference (EMI), and high power density is presented. The calculation of Ls, Cs, and Lm depends on the Q_rated, K_ind, and f_res. Found inside – Page 143To extend the ZVS range, a series of the full-bridge converters with various resonant tanks are presented. Among them, the converters with LC or LLC resonant tank are more attractive [14–19]. Nevertheless, the parameters of resonant ... E quiv alent circuit concept approac h and fundame ntal harmonics analysis . Abstract: In this paper, high efficiency full bridge LLC resonant converter for server power system is introduced. DESIGN OF FULL BRIDGE THREE LEVEL LLC RESONANT CONVERTER FOR WIRELESS BATTERY CHARGING WITH PULSE WIDTH MODULATION TECHNIQUE M. Pradeep1, A.K. In many applications, such as flat panel TVs, 85+ ATX PCs or small form factor PCs, where the Found inside – Page 81Lo, Y.-K.; Lin, C.-H.; Hsieh, M.-I.; Lin, C.-H. Phase-shifted full-bridge series-resonant DC–DC converters for wide load variations. IEEE Trans. Ind. Electron. 2010, 58, 2572–2575. [CrossRef] 9. Schmidt, J.C.M.; Maragaño, J.C.; Sartori, ... Download ready-to-use system files to speed your design process. With above design, the operating region of the converter is shown in Figure 4.2 as Download ready-to-use system files to speed your design process. The Q_rated is 0.75 and K_ind = 4 with the required G_dc = 1.0527. The magnetizing inductance of the transformer, along with the inductor and capacitor, form the LLC resonant rank. No results found. The simulations can be done by including relevant parasitic, dead-time, MOSFET capacitance, etc. See terms of use. Found inside – Page 9-38Currently used OBCs are based on cascaded design of two converters with the frontend converting the grid AC voltage into an ... for the DC/DC stage of the OBC such as the phase shifted full-bridge (PSFB) and the LLC resonant converters, ... Manufacturer Application Category. Targeting high power density applications such as fast DC chargers for electric vehicles (EV) The AC-side of the full-bridge is connected to the primary side of a high-frequency transformer via a series-connected inductor and capacitor. This topic presents a design procedure for the LLC resonant half-bridge converter, beginning with a brief review of basic resonant-converter The calculated frequency from the tools will provide precise enough results to have proper load and line regulations for a non-ideal or lossy system. The resonant LLC converter circuit for a 20-kW DC-DC converter has the following specifications: Vin_rated = 700V; Vin_min = 650V; Vin_max =750V This board was designed to make it easy for the user to: x Evaluate converter level efficiency and power density gains when using the new 1000V, 65 mO SiC MOSFETs in a 4L-TO247 package in a full bridge resonant LLC circuit. LLC resonant converter. Hence a proper trade-off has to be made between required frequency range, components sizing, and amount of circulating current. 2013 Key waveforms Figure 2.1: Schematic and basic waveforms for HB LLC converter operating at resonant frequency. Here in this paper the LLC resonant converter of constant output voltage is designed using first harmonic . The waveforms are identical, validating the Steady State Tool. The reference design is specified for an input voltage range of 380 to 420 VDC, with an output of 55 volts at 55 amps. Also, this combination ensures low voltage stress on resonant capacitance (Cs) and higher power density due to the reduced size of resonant capacitance and overall magnetics. Found inside – Page 118It can also be implemented as an LC resonant tank, which combines with the transmitting coil to form a full-bridge (or halfbridge) LLC resonant converter. Despite the fact that only a single inverter is used in this three-stage ... In Figure 2, the dc gain curves are generated with variation in relative frequency from the start of ZVS of primary switches (lagging mode below resonant) up to above resonant. ​​​​​​​​. These selections ensure a reasonably narrow range in frequency and enough circulating current to have the boost in below resonant operation. This application note describes how to design an optimized resonant LLC power converter for a 20-kW DC-DC converter with the Full-bridge Resonant LLC template. The LLC resonant full-bridge converter is used widely in different industries and applications due to some important features such as high-power density, high efficiency, and cost-effectiveness [11,12]. Define input and output requirements as well as the operating conditions in the Input Parameter panel, Perform parameter optimization and design comparison using the Design Curve Tool, Analyze and verify zero voltage switching (ZVS) and zero current switching (ZCS) operations, steady-state waveforms, output calculations, boundary conditions, and extreme case conditions of the converter using the Steady State Solver Tool, Update the parameter file, and run time-domain simulation to validate the design, K_ind (parallel-to-series inductance ratio Lm/Ls) – 5, K_rel_freq (relative frequency factor) – 0.75, At K_ind = 4 and Q_rated = 0.3, the required relative frequency range is from 0.76 to 1.63 for the required dc gain, At K_ind = 4 and Q_rated = 0.6, the required relative frequency range is from 0.75 to 1.38 for the required dc gain, At K_ind = 4 and Q_rated = 0.8, the required relative frequency range is from 0.75 to 1.31 for the required dc gain. A fully assembled board has been developed for testing and performance validation only, and is not available for sale. In order to have high efficiency within wide input voltage range, high power factor for the LLC resonant tank should be ensured. This paper provides a detailed practical design aspect of full bridge LLC resonant converter. With its new driving techniques, the synchronous rectification can be realized for LLC converter operated with secondary . LLC RESONANT CONVERTER AND FUNDAMENTAL APPROXIMATION Figure 2 shows the simplified schematic of a half−bridge LLC resonant converter, where Lm is the magnetizing inductance that acts as a shunt inductor, Lr is the series resonant inductor, and Cr is the resonant capacitor. Figure 3: Generated Excel file with Q_rated = 0.3, K_ind = 3 to 7 and K_ind=4, Q_rated = 0.2 to 0.8. Since the benefits of a LLC resonant converter are high efficiency, high power density and low EMI, it is a very interesting topology for vehicular . A lookup table of the relative frequency factor versus the voltage gain will be automatically generated by the Design Suite. The kit consists of a power board, digital control board, adapter board, and firmware modules. Based on the 20kW DC/DC converter specification above, a resonant full-bridge resonant LLC circuit is selected with a full-bridge secondary diode rectifier. The power delivery interval of the phase shift topology is similar to the traditional full bridge converter, in that two diagonal switches are on (A&D or B&C). Detailed step-by-step sequential flow helps engineers to easily follow and complete designs.

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