Patent
LLC series resonant DC-to-DC converter
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TLDR
In this paper, a DC-to-DC converter with a square wave generator and a series of capacitors is presented, and the converter runs at variable frequency switching to perform output regulation.Abstract:
The present invention discloses a DC-to-DC converter. The DC-to-DC converter includes a square wave generator for generating a sequence of output voltages having a waveform of square wave. The DC-to-DC converter further includes a resonant tank connected to the square wave generator comprising a series capacitor connected to a series inductor and a parallel inductor. The DC-to-DC converter further includes a transformer having a primary side connected in series with the series inductor and connected in parallel to the parallel inductor. The transformer further includes a secondary side for connecting to a rectifying circuit for providing a rectified DC voltage to an output load circuit. The series capacitor functioning with the series inductor to provide a first characteristic resonant frequency represented by ƒ s , and the series capacitor functioning with the series inductor and the parallel inductor to provide a second characteristic resonant frequency represented by ƒ m wherein ƒ s >ƒ m . The converter runs at variable frequency switching to perform output regulation. The converter features high conversion efficiency at high input operation by switching at frequency between the first and second characteristic resonant frequency. In a preferred embodiment, the parallel inductor is integrated to transformer as primary magnetizing inductor and in further the series inductor may also be integrated into transformer.read more
Citations
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Journal ArticleDOI
LLC Resonant Converter With Matrix Transformer
TL;DR: In this article, a high-efficiency high power density LLC resonant converter with a matrix transformer is proposed, which can help reduce leakage inductance and the ac resistance of windings so that the flux cancellation method can then be utilized to reduce core size and loss.
Proceedings ArticleDOI
Three level LLC series resonant DC/DC converter
TL;DR: In this paper, a three level soft switching LLC series resonant DC/DC converter is presented, where the voltage stress of each main switch is half of the input voltage and the rectifier diodes are replaced by two-stage resonance.
Proceedings ArticleDOI
Current sharing in three-phase LLC interleaved resonant converter
TL;DR: In this paper, a novel approach for multi-phase interleaved LLC resonant converter is presented, based on the use of three LLC modules with star connection of transformer primary windings, allowing a drastic reduction of the output current ripple and consequently of output filter capacitor size.
Proceedings ArticleDOI
LLC resonant converter with matrix transformer
TL;DR: In this article, a high efficiency high power density matrix transformer structure for LLC resonant converters is proposed, which helps to reduce leakage inductance and the AC resistance of windings.
Patent
Resonant converter system and controlling method thereof having relatively better efficiency
TL;DR: In this article, a hybrid control apparatus coupled to a resonant converter was proposed to adjust a phase angle and a frequency of the converter such that the converter would reach a relatively lower voltage gain and have a lower loss during an abnormal operation.
References
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Patent
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TL;DR: In this paper, the turnoff time of the discharging switch is dependent upon the current in the resonant transformer primary circuit, thereby preserving bidirectional zero-voltage switching.
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Resonant converter with controlled inductor
TL;DR: In this paper, a controlled inductor with a magnetic core having one or more power windings and a control winding wound on the core is used to change the capacitor impedance and thus influence the converter output.
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Resonant converters with secondary-side resonance
Fred C. Lee,Kwang-Hwa Liu +1 more
TL;DR: In this article, a family of quasi-resonant converters is described, comprising a voltage source, a transformer having primary and secondary windings, and a switch for periodically coupling the voltage source to the primary winding, whereby a charging current appears on the secondary winding.
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TL;DR: In this paper, a fixed frequency series resonant converter with a resonant snubber comprising an inductor and capacitor connected across a tank circuit of the converter has been proposed to minimize the degree of conduction through a body-diode within a transistor switch.