Analysis of multi-resonant LLCLC converter

Mazgut, Roman; Galád, Martin; Kascak, Slavomir; Špánik, Pavol

doi:10.1109/elektro.2016.7512063

Cited by 4 publications

(5 citation statements)

References 9 publications

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“…So overall, the buck-boost operation is performed by just changing the input frequency of the converter. The gain of a resonant tank with L as the inductance ratio, Q as the quality factor, and fN as the normalized switching frequency is given by (R. Mazgut et al, 2016):…”

Section: Llclc Resonant Tank Analysismentioning

confidence: 99%

“…The LCLC or other four-element resonant converters provide two peak gain values in voltage gain characteristics but achieving zero gain is still not possible (R. Lin et al, 2018). On the other hand, LLCLC resonant converters can achieve approximately zero gain at an achievable switching frequency (R. Mazgut et al, 2016& J. Koscelnik et al, 2020. These converters consist of LLC resonant components with additional parallel LC components in series on the primary side.…”

Section: Introductionmentioning

confidence: 99%

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The LLCLC resonant converter based pseudo DC link inverter

Arif

Arshad²,

Aslam³

et al. 2022

JER is an international, peer-reviewed journal that publishes f

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Technological advancements in solar power systems necessitate highly reliable power inverters with high efficiency and small size. An LLC resonant converter-based pseudo-Direct Current (DC) link inverters offer these qualities to some extent. The resonant circuits of conventional pseudo-DC link inverters cannot attain a zero gain and cannot handle variable frequency control which in turn requires very large filters to produce pure sinusoidal output voltages for the grid. The usage of these filters consequences in the enhanced price and size of inverters; moreover, the reliability of inverters is also reduced. We propose a novel topology for a pseudo-DC link inverter based on an LLCLC resonant converter. The proposed inverter does not require large filters, because it generates rectified sinusoidal output voltages. An additional parallel LC component is added in series to the resonant circuit, which makes it able to attain a zero gain through an infinite circuit impedance. The 400 W pseudo-DC link inverter with a 40 V input and a 400 V output is designed and simulated on OrCAD PSpice software. The results showed that there is a significant improvement in achieving a zero gain. The possible lowest gain achieved is approximately 0.125. The proposed technique claimed to be more efficient than those formerly used, subsequently contributing to satisfying outcomes.

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Section: Llclc Resonant Tank Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The LLCLC resonant converter based pseudo DC link inverter

Arif

Arshad²,

Aslam³

et al. 2022

JER is an international, peer-reviewed journal that publishes f

View full text Add to dashboard Cite

show abstract

“…at an achievable switching frequency [9][10][11]. The LLCLC converters consist of LLC resonant components with an additional parallel LC component in series on the primary side.…”

Section: Proposed Topologymentioning

confidence: 99%

“…At f R3 , the gain is again one and has a low impedance for third harmonics, reducing reactive power. The gain G of the resonant tank with inductance ratio L, quality factor Q and normalized switching frequency f N is given by [10]:…”

Section: Proposed Topologymentioning

confidence: 99%

“…The four element resonant converters provide two peak values in voltage gain, but achieving a zero gain is still not possible [8]. In contrast, LLCLC resonant converters have the ability to achieve an approximately zero gain at an achievable switching frequency [9][10][11]. The LLCLC converters consist of LLC resonant components with an additional parallel LC component in series on the primary side.…”

Section: Introductionmentioning

confidence: 99%

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LLCLC Resonant Converter Based Pseudo DC Link Inverter

Arif

Junaid

Iqbal

2021

The 1st International Conference on Energy, Power and Environment

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Technological advancements in solar power systems necessitate highly reliable power inverters with a high efficiency and a small size. An LLC resonant converter-based pseudo Direct Current (DC) link inverters offer these qualities to some extent. The resonant circuits of conventional pseudo DC link inverters lack the ability to attain a zero gain and cannot handle variable frequency control which in turn requires very large filters to produce pure sinusoidal output voltages for grid. The usage of these filters consequences in the enhanced price and size of inverters; moreover, the reliability of inverters is also reduced. We propose a novel topology for a pseudo DC link inverter based on an LLCLC resonant converter. The proposed inverter does not require large filters, because it generates rectified sinusoidal output voltages. An additional parallel LC component is added in series to the resonant circuit, which makes it able to attain a zero gain through an infinite circuit impedance. The 400 W pseudo DC link inverter with a 40 V input and a 400 V output is designed and simulated on OrCAD PSpice software. The results showed that there is a significant improvement in achieving a zero gain. The possible lowest gain achieved is approximately 0.125. The proposed technique attested to be more efficient than those formerly used, subsequently contributing satisfying outcomes.

show abstract