Modified Double Auxiliary Resonant Commutated Pole Inverter and its Modulation Strategy

Chu, Enhui; Chen, Zhifang; Xie, Haolin; Zhang, Huaguang

doi:10.1109/jestpe.2019.2939168

Cited by 34 publications

(3 citation statements)

References 26 publications

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“…Refs [27–30] eliminates the voltage‐dividing capacitor and also does not use a transformer, and the energy for the auxiliary resonance is obtained from the busbar.…”

Section: Introductionmentioning

confidence: 99%

Novel Auxiliary Resonant Pole Inverter and its Optimal Control Strategy

Liu,

Wang,

et al. 2023

IEEJ Transactions Elec Engng

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Conventional inverters operate in hard‐switching mode, and as the switching frequency increases, the switching losses increase dramatically. Increasing the switching frequency helps reduce the size and cost of the inverter, but too high a switching frequency generates greater switching losses, which affects the inverter's transmission efficiency. In response to the problem that conventional hard‐switching inverters cannot be higher in frequency and have high switching losses and low transmission efficiency, an optimized auxiliary resonant commutated inverter and control strategy are proposed to make the inverter work in soft‐switching mode, which helps reduce the switching losses. The auxiliary converters in the bridge arm topology of each phase of the three‐phase inverter are divided into two groups, and the operating auxiliary converters are selected according to the direction of the load current. When the load current direction is positive, the upper bridge arm auxiliary device works and the lower bridge arm auxiliary device turns off, similarly when the load current direction is negative, the lower bridge arm auxiliary device works and the upper bridge arm auxiliary device turns off, this can ensure that only one group of devices works every half cycle, making the control strategy simple and reducing auxiliary circuit losses. Simulation and experimental verification of the effectiveness of the proposed scheme. © 2023 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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“…Refs [27–30] eliminates the voltage‐dividing capacitor and also does not use a transformer, and the energy for the auxiliary resonance is obtained from the busbar.…”

Section: Introductionmentioning

confidence: 99%

Novel Auxiliary Resonant Pole Inverter and its Optimal Control Strategy

Liu,

Wang,

et al. 2023

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

show abstract

“…Other studies (Yu et al, 2009;Chu et al, 2014;Chu et al, 2019;Wang and Wang, 2020;Chu et al, 2022) do not use a midpoint capacitor for current conversion, but their control strategy has an auxiliary circuit operating at both dead times within a single PWM cycle, which leads to an increase in losses.…”

Section: Introductionmentioning

confidence: 99%

Topology and control strategy optimization of an auxiliary resonant commutated pole-based, soft-switching grid-connected inverter

Liu,

Wang

2023

Front. Energy Res.

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With the development of new energy industries such as photovoltaics, microgrids, or distributed energy sources require many DC-AC grid-connected interfaces. Reducing the switching loss of the inverter is important to improve the transmission efficiency of the inverter, reduce the heat generation of the inverter, promote the high frequency and miniaturization of the inverter, and efficiently use the distributed energy. Therefore, considering the wide application of DC-AC power electronic interfaces in microgrid and distributed energy, and to make up for existing deficiencies in traditional hard-switching inverters, an optimal control strategy and topology for an optimal-auxiliary resonant commutated pole (O-ARCP) inverter is proposed in this article. Firstly, this paper introduces the proposed inverter topology and analyzes the operation mode of the circuit with the control strategy. Then simulation experiments in islanding mode are carried out to verify the rationality of the content, and finally simplified experimental verification is carried out based on the simulation results. Simulation and experimental testing reveal that all switches of the proposed topology are in soft-switching mode, which proves the effectiveness of the proposed control strategy and analysis. The analysis and validation of this paper provide assistance in the development of control strategies and structures for soft-switching inverters.

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“…Auxiliary resonant commutated pole (ARCP) is a typical topology of ZVT soft-switching [6,7]. The auxiliary resonant circuit includes auxiliary power switches, resonant inductors and resonant capacitors.…”

Section: Introductionmentioning

confidence: 99%

A zero‐current‐transition soft‐switching technique for T‐type NPC three‐level inverter

Yin

Yao

2022

IET Power Electronics

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Based on the commutation property of the T‐type neutral point clamped (T‐NPC) three‐level inverter, a novel zero‐current‐transition (ZCT) soft‐switching topology is proposed. The proposed topology employs only two auxiliary switches and one inductor and capacitor (LC) resonant tank on each phase leg. The commutation process of the soft‐switching technique is analyzed. The results show that all switches on main leg and auxiliary leg can achieve soft commutation without changing pulse width modulation (PWM) strategy. The control family of T‐NPC three‐level ZCT soft‐switching topology are analyzed respectively, and then the resonant tank and timing schemes of different modes are given. Using two auxiliary switches in resonance can produce greater resonance current due to the combination of external excitation sources, which is more conducive to realize the soft‐switching commutation of the main switch. At last, a half bridge prototype of T‐NPC three‐level inverter is built. The influence of equivalent internal resistance of power switches, diode reverse recovery and stray inductance for soft commutation is analyzed. The advantages of ZCT soft‐switching technology is verified.

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Modified Double Auxiliary Resonant Commutated Pole Inverter and its Modulation Strategy

Cited by 34 publications

References 26 publications

Novel Auxiliary Resonant Pole Inverter and its Optimal Control Strategy

Novel Auxiliary Resonant Pole Inverter and its Optimal Control Strategy

Topology and control strategy optimization of an auxiliary resonant commutated pole-based, soft-switching grid-connected inverter

A zero‐current‐transition soft‐switching technique for T‐type NPC three‐level inverter

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