2. AN INTRODUCTION TO THE LLC RESONANT CONVERTER 2.1 LLC Resonant Converter Introduction Conventional PWM converters regulate the output voltage by adjusting the switching-cycle pulse width. The maximum duty cycle and main component parameter designed for must bethe minimum input
In this paper, a coupled-inductor interleaved LLC resonant converter (CI-ILLC) was proposed, which can achieve extensive operation range applications by multiplexing inductors and switches. In this proposed CI-ILLC, …
LLC-SRC designs apply a powder-iron-based core to the resonant inductor as a trade-off between winding loss and core loss. Nevertheless, high ΔB generates considerable losses on the resonant inductor – either a high winding loss or a high core loss. SSZTCW1 – FEBRUARY 2024 Submit Document Feedback
LLC resonant inductor core/ Material RM8 / 3C90 material . Wire size/ Number of turns 60 strands of 0.1 mm / 20 turns . B. Modelling of LLC resona nt converter .
The LLC resonant converter is one of the most popular isolated DC/DC converters and has been widely adopted in many industrial applications due to its soft-switching capability. Therefore, it is of great importance to …
LLC Resonant Converter 94 Chapter 4 LLC Resonant Converter 4.1 Introduction In previous chapters, the trends and technical challenges for front end DC/DC converter were discussed. High power density, high efficiency and high power are ... resonant inductor Lr and resonant capacitor Cr are in series. They form a series .
Resonant LLC Converter: Operation and Design 4 Application Note AN 2012-09 V1.0 September 2012 1 Introduction While a resonant LLC converter has several desired features such as high efficiency, low EMI and high power density, the design of a resonant converter is an involved task, and requires more effort for optimization compared to PWM ...
A design methodology for the LLC resonant converter controlled with a VI (Variable Inductor) in order to control the charging process of the battery charger. Based on the respective merits of the LLC resonant converter and the VI (Variable Inductor), a new battery charger topology is proposed. This paper presents a design methodology for the LLC resonant …
For a LLC resonant converter, the magnetic components need to be designed are shown in Figure 5.1. There are three magnetic components: Lr, Lm and ... build one resonant inductor and one transformer with magnetizing inductance. Figure 5.1 …
A half-bridge LLC resonant converter is designed and implemented with an input voltage of 380 V, an output voltage of 12 V, and a rated output current of 50 A. Experimental results demonstrate …
In this paper, a hybrid control method with adaptive phase-shifting modulation (PSM) and pulse-frequency modulation (PFM) is proposed to optimize the steady-state performance of an LLC resonant converter in wide voltage-gain range application. For the primary-side switches under the hybrid control method, zero-voltage switching (ZVS) …
2. Analysis of Resonant Tank Current . Figure 1 is an LLC resonant half-bridge converter circuit. • S 1 and S 2 are primary MOSFETs. • C S1 and C S2 are parasitic capacitors between drain and sourceof MOSFET. • D s1 and D s2 are body diodes of MOSFET. • L r and C r are resonant inductor and resonant capacitor. • L m is the magnetic ...
This paper presents a comprehensive analysis of a novel control approach to improve the efficiency of parallel LLC resonant inverters using a combination of a current controlled variable inductor (VI) and phase shift (PS).
The LLC Converter The LLC Transformer The benefits of the LLC topology for multi-KW On Board Charger (OBC) applications are well understood with the resonant inductor facilitating zero volt switching operation. The LLC transformer leakage inductance can replace a discrete resonant inductor if the value can be correctly sized and
A conventional pulse frequency modulation (PFM) controlled LLC resonant converter requires a wide switching frequency operating range to regulate the output voltage.
I have an LLC I am getting up and running. Input is 390V, output is 230V. When the part starts switching, it does drive the gates properly and power is transferred across the transformer. But in doing so the resonant inductor starts burning 100W and obviously heats up. Due to component shortages in my stock I do not have a well matched circuit.
LLC Resonant Converter: Analysis and Design Lokesha M H, Dr S G Srivani PG student, Associate professor, Dept. of EEE, RVCE Bangalore Abstract- Inductor Inductor Capacitor (LLC) resonant converter has gained attention of researchers and engineers these days High efficiency, power density and Reliability. LLC resonant converter is most suitable
In this paper, a four-phase integrated magnetic structure for LLC resonant converter is introduced, which integrates transformers and resonant inductors in a single core reducing the volume of …
Step 1: Measure the resonant inductor Lr voltage v Lr of the LLC resonant converter and the system output voltage V out in real time. Step 2: Judge the working stage of the LLC converter according to
resonant inductor is automatically adjusted, optimising the converter operation by matching the new resonant frequency with switching frequency. Unlike conventional LLC converter which can only be optimised at one specific input voltage level. In addition, more energy is stored and transferred to the load
3. HALF-BRIDGE LLC RESONANT INVERTER 3.1 Circuit description The circuit consist five parts; the switching bridge (inverter) [18, 19], the resonant tank, a high frequency transformer, a rectifier and a load (coil+workpiece) The half bridge LLC tank consists of two resonant inductors, a series inductor (L r) and a magnetizing inductor (L m), a
This letter proposes a modified LLC resonant converter, which can achieve automatic current sharing of secondary windings by distributing the resonant inductor to each secondary winding. Theoretical analysis indicates that the current balance of each paralleled secondary winding only depends on the inductance of distributed resonant inductors ...
This section offers an overview of the LLC converter operation and waveforms in the different modes. Figure 2.1 shows a Full-Bridge LLC converter with Full-Bridge rectifier. In a simplistic …
The value of the resonant inductor Lr is realized by the transformer leakage inductance, which is embodied in that there is an inductance ratio between the resonant inductor Lr and the excitation inductor Lm, set to λ, where the value is 10. The value of Cr is determined by Lr and the resonant frequency fr, and the resonant frequency is 650 kHz.
The LLC series resonant converter with a LLT (Inductor-Inductor-Transformer) transformer design process and experimentation results for PDP TV power supply is presented.
Since the resonant capacitor and the magnetizing inductor in the LLC resonant converter are relatively large, the [t 1 -t 2 ] period is relatively short, so it can be considered that the resonant ...
The operation of an LLC resonant converter may be characterized by the relationship of the switching frequency, denoted as fsw, to the series resonant frequency (f0). Fig. 4 illustrates the typical waveforms of an LLC resonant converter with the switching frequency at, below, or above the series resonant frequency. The graphs show,
LLC resonant converter, where Lm is the magnetizing inductance that acts as a shunt inductor, L r is the series resonant inductor, and C r is the resonant capacitor.
the voltage across the inductor of the resonant circuit (inductor sensing method). For both methods, a calculation strategy, simula-tion results and experimental data are presented. 2 Description of the methods The schematic of the full-bridge LLC resonant converter is illu-strated in Fig. 1. To effectively protect it from the short circuit on
