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2018
This chapter studies the LLC resonant converter operation in different modes. First harmonic approximation (FHA) is used to obtain the main converter characteristics in steady-state, including the dc voltage static gain. The obtained equations and curves are used to design circuit parameters and predict performance, which is verified through numerical ...
Ivo Barbi, Fabiana Pöttker
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This chapter studies the LLC resonant converter operation in different modes. First harmonic approximation (FHA) is used to obtain the main converter characteristics in steady-state, including the dc voltage static gain. The obtained equations and curves are used to design circuit parameters and predict performance, which is verified through numerical ...
Ivo Barbi, Fabiana Pöttker
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A review on LLC Resonant Converter
2016 International Conference on Computation of Power, Energy Information and Commuincation (ICCPEIC), 2016Resonant Converters have wide applications as they can produce a high voltage. Also these converters can reduce the switching losses by operating at Zero Current Switching and Zero voltage switching states. Series Resonant Converter can be used for low output current and Parallel Resonant converter can be used for high output current applications ...
null Bhuvaneswari C. +1 more
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A Family of LLC Converters with Magnetic Control
2021 IEEE Applied Power Electronics Conference and Exposition (APEC), 2021Although frequency control is an effective and common control strategy for resonant converters, it still has some drawbacks: 1) wide operating switching frequency range is required; 2) degraded circuit electro-magnetic interference (EMI) performance; 3) in some applications, like interleaving and multiple output operations, not enough control freedoms ...
Yuqi Wei, Alan Mantooth
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Phase Control and Power Optimization of LLC Converter
2019 IEEE International Symposium on Circuits and Systems (ISCAS), 2019LLC resonant converters offer high efficiency at high frequencies because of their ability to achieve Zero Voltage Switching (ZVS) or Zero Current Switching (ZCS). However, they require a variable frequency control, which generates a wide range of harmonics and causes electromagnetic compatibility issues.
Kollipara, N. +3 more
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Resonant LLC Low Voltage Converter
2020 1st International Conference Problems of Informatics, Electronics, and Radio Engineering (PIERE), 2020The practical experience of designing a resonant LLC converter with a low voltage input is presented, using the example of converting battery energy in guaranteed power supply systems. A comparative analysis of LC and LLC converters was carried out. The basic characteristics of the converter are determined, allowing coordinating the range of operating ...
Ilya S. Shemolin +3 more
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An improved design method of LLC resonant converter
2012 IEEE International Symposium on Industrial Electronics, 2012For LLC resonant converter, design of the resonant tank influences much of the performance. In traditional design ideas, the transformer magnetizing inductance values are more dependent on engineering experience. In this paper, a model is constructed based on the proposed “current angle” theory by accurately calculating the LLC resonant converter in ...
Xue Zhang +4 more
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Envelope model for resonant converters and application in LLC converters
2007 European Conference on Power Electronics and Applications, 2007This paper presents the large and small signal envelope models for switching networks and rectifiers with variable frequency phase-shifted control for resonant converters. The model can be used to quickly perform DC and AC analysis with SPICE-compatible soft tools for a converter with frequency control, duty cycle control and variable frequency and ...
J. Tian +6 more
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LLC resonant converter design for bendable power converter
2016 IEEE Applied Power Electronics Conference and Exposition (APEC), 2016In this paper, a design approach of LLC resonant converter with bendable transformer is presented. First, the electrical parameters of the LLC resonant converter are calculated based on the first-harmonic-approximation (FHA) equivalent circuit. Second, the bendable transformer design approach based on bendable transformer model gives the physical ...
Godwin Kwun Yuan Ho +2 more
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Voltage Feedback of an LLC Resonant Converter with a Rotary Transformer
IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018Rotary assembly platforms are used in several automation applications, such as box-fill systems. In modern automatic machines, several actuators may be mounted on the rotating platform, but this architecture raises the problem of their feeding. The solution developed in this paper consists in adopting a LLC resonant converter that uses the leakage and ...
Rizzoli, Gabriele +3 more
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Bus converter employing LLC converter operating with variable switching frequency
IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016In this paper, a bus converter employing LLC converter operating variable switching frequency is proposed. Resonant tank devices have a tolerance with manufacturing process and operating that could induce a lower efficiency converter. To keep an optimal operating, switching frequency should track the resonant frequency by tracking control.
Jun-Woo Park +4 more
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