full bridge llc resonant converter design

Figure 7 shows the simulated results at the minimum output voltage (300V) and rated input voltage (400V) at K_rel_freq = 1.196 (239.2kHz) (above resonant mode). The topology is of a full bridge LLC resonant converter with synchronous rectification. Found inside – Page 403B. Sasic, M. Zivanov, L. Nagy, M. Lazic, “Power Regulator Design for Fuel CellApplications”, Electronics Journal, Vol. ... K. Jin, X. Ruan, “ Hybrid Full Bridge Three-Level LLC Resonant Converter – A Novel DC-DC Converter Suitable for ... LLC resonant full-bridge converter. Key benefits and features of the 3kW LLC include: High density: up to 146W/inch 3 (including air-forced cooling) The power supply employs Full Bridge Resonant LLC with phase shift operating at ramp up, light load, low output voltage. The proposed topology uses a high-frequency transformer to optimize the size and weight of the converter. Power Supplies Product Type. 2. Design considerations of the power MOSFET in the primary side LLC resonant converter are relatively simple compared to a phase-shifted full-bridge converter, as it is not affected by leading or Found inside – Page 18IEEE Trans Power Electron 28(2):985–994 Jin K, Ruan X (2006) Hybrid full-bridge three-level LLC resonant converter—a novel DC–DC converter suitable for fuel-cell power system. IEEE Trans Ind Electron 53(5):1492–1503 Liang Z, Guo R, ... LLC Resonant Half Bridge Converter Operation 3. Proactively assess worst and corner case stress and thermal of devices. This paper provides a detailed practical design aspect of full bridge LLC resonant converter. Inductor Inductor Capacitor(LLC) resonant converter has gained attention of researchers and engineers these days because of its advantages such as low switching losses due to ZVS turn on, possibility of high frequency operation, high power density over other existing resonant converters. TIDM-02002 Bidirectional CLLLC resonant dual active bridge (DAB) reference design for HEV/EV onboard charger simplified schematic (click on schematic to enlarge) A full-bridge LLC converter, as shown in Figure 5, falls under the broad category of DAB converters. After files are unpacked, a template circuit will be displayed as shown below. 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 . The waveforms are identical, validating the Steady State Tool. Full Bridge vs. Half Bridge Switching. Found inside – Page 290Rathore K, Prasanna UR (2013) Analysis, design, and experimental results of novel snubberless bidirectional ... Haga H, Kurokawa F (2017) Modulation method of a full-bridge three-level LLC resonant converter for battery charger of ... 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 ... This applies the full input voltage across the primary and results in power transfer to the load. Cs = 1/(2*pi*f_res*Q_rated*Ro_rated_pri) = 3.9085e-08 F In order to have high efficiency within wide input voltage range, high power factor for the LLC resonant tank should be ensured. See terms of use. 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. The calculation of Ls, Cs, and Lm depends on the Q_rated, K_ind, and f_res. Found inside – Page 174Figure5.16a shows the full bridge inverter voltage, vin. ... It is evident that LLC tank is operating at switching frequency lower than the series resonant frequency. ... 5.15 and justifies the choice of LLmr = 0.07 in the design. 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. Figure 1. 2013 Key waveforms Figure 2.1: Schematic and basic waveforms for HB LLC converter operating at resonant frequency. Figure 1. 3 Design Equations The following are design equations for the LLC converter, including a design example using Half Bridge front- Design considerations of the power MOSFET in the primary side LLC resonant converter are relatively simple compared to a phase-shifted full-bridge converter, as it is not affected by leading or Po_rated = 20kW The primary half bridge and the output rectification are the other two stages to be defined. The main focus of the design tool is to address common issues proactively, such as corner case stress of devices, device tolerance effect to performance, and. Includes TI products in the design and potential alternatives. This operating mode can replace PWM operating mode in LLC, which can improve efficiency signficantly in light load. 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, Detailed overview of design layout for component placement, Files used for 3D models or 2D drawings of IC components, Design file that contains information on physical board layer of design PCB, PCB layer plot file used for generating PCB design layout. General LLC resonant converter topology. The kit consists of a power board, digital control board, adapter board, and firmware modules. In PSIM, go to Design Suites >> Power Supply Design Suite, and select Full-bridge Resonant LLC. But on the other hand, by increasing the value of Q_rated, a lower switching frequency will be required to obtain the minimum dc gain. A narrow range of the frequency is important for magnetics design, controller selection, and component sizing. Includes TI products in the design and potential alternatives. 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 ... DESIGN OF FULL BRIDGE THREE LEVEL LLC RESONANT CONVERTER FOR WIRELESS BATTERY CHARGING WITH PULSE WIDTH MODULATION TECHNIQUE M. Pradeep1, A.K. It also makes sure that both buck and boost regions of the resonant tank are covered with unity gain at the resonant frequency. System Specifications The resonant LLC converter for a 3.3‐kW on‐board charger has the following specifications: Found inside – Page 654By including additional inductor and capacitor than LLC type resonant converter upgrades it with many more positive characteristics. The design fabricated in article [56] is an enhanced full-bridge three-level converter. Please clear your search and try again. 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. This type of converter includes a half bridge topology and is only designed for unidirectional power transfer. Design of Resonant Half-Bridge converter using IRS2795(1,2) Control IC By Helen Ding Table of Contents 1. 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. After comparing the calculated output values in the Excel file, select the final design values so that the overall design is well balanced to have the best trade-offs for efficiency, power density, cost, and voltage regulation. Found inside – Page 42The Full Bridge LLC Resonant Converter (Figure 50) 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. Although a much higher value of Q_rated beyond 1 can be considered for its narrower range variation in frequency especially at light load, the rated quality factor directly affects the size of magnetics and capacitance. the full bridge are shown in Figure 4. 500 kHz resonant frequency, 300 kHz to 700 kHz operational frequency, High frequency, high voltage active synchronous rectifier control with Rogowski coil. Full bridge LLC transformer/resonant choke combo targets EV inverter apps. Figure 1 shows a full-bridge LLC resonant converter modeled in PLECS. 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. Simulate the resonant LLC power circuit with the selected values of Ls, Cs, Lm, Q_rated, and K_ind. 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. Switches within the Phase Shifted full bridge converter will be utilized differently than those of its non-resonant counterpart. for an LLC Resonant Converter Hangseok Choi Power Conversion Team. CRD-20DD09P-2, 20kW Full Bridge Resonant LLC Converter Board Enabling Smaller, Cooler and Lower Cost off-board EV Chargers Reference Design using part NCP1395 by WOLFSPEED, INC Enlarge. Compared with the traditional pulse frequency modulation (PFM) controlled . Transient Simulation Circuit of LLC Resonant Half Bridge Converter Lr =29 uH Cr =22 nF Load Resonant Tank * * * Cout =220 uF Vin =400 V Q1 Q2 D1 D2 T1 Lm =411 uH 16 :1 Node : Vin Node . K_ind = 4, Q_rated = 0.2 to 0.9 with step size of 0.2 in the bottom panel. Two sets of design curves and an Excel file with output parameters will be generated automatically using the tool. The full paper offers a design pro cedure of the resonant LLC converter usi ng a new DCM model of th e output rectifier. Series connected MOSFETs in a half-bridge configuration This topic presents a design procedure for the LLC resonant half-bridge converter, beginning with a brief review of basic resonant-converter The final design is easily validated in time-domain simulation in PSIM. Figure 6: Waveforms from the Steady State Tool at the rated output voltage (500V) and rated input voltage (700V) at K_rel_freq = 0.9247 @185kHz (below resonant mode). Transformer and Resonant Circuit Design 4. One has the option to modify input specifications with the range of Q_rated and K_ind in the left interface of the tool. 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. IRS2795 Passive Components Design 5. Usually a LLC resonant converter is used in applications with high input voltage (300-400 V) and low output voltage (48-60 V). This operating mode can replace PWM operating mode in LLC, which can improve efficiency signficantly in light load. ×. If you have questions about quality, packaging or ordering TI products, see TI support. II. Pre-built design templates are provided for full-bridge and half-bridge resonant LLC converters. The Design Suite can be used for the design and optimization of the LLC resonant tank in various power conversion applications. Ls = (Q_rated*Ro_rated_pri)/(2*pi*f_res) = 1.6202e-05 H The STEVAL-DPSLLCK1 is a digitally controlled 3 kW full bridge LLC resonant DC-DC converter with output synchronous rectification. With above parameters, the range of Q is from 6 (Full load) to 0 (No load). Found inside – Page 571Infineon Technologies North America (INFA) Corporation, January 2013. http://www.mouser.com/pdfdocs/2-9.pdf Fairchild Application Note AN4151 (2014) Half bridge LLC resonant converter design using FSFR-series fairchild power switch ... No results found. Click on Calculate G_dc to display the dc gain curves (as shown in Figure 2) with respect to the relative frequency factor (K_rel_freq) to find the range of relative frequency for the required dc gain. Abstract—The focus of this study is on the design of a full- bridge unidirectional resonant LLC Solid State Transformer. 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]. The GS-EVB-LLC-3KW-GS Evaluation Board and Reference Design. hardware design and control loop design is described in LLC Resonant Converter Design Using MC56F82748 (document DRM172). 5. The operating Q is 0.75 and K_ind = 4 with the required G_dc = 0.842. 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 the selected Q_rated and K_ind, the optimum values of Ls, Cs, and Lm can be obtained as below.

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