Three‐phase double auxiliary resonant commutated pole inverter topology and analysis of its working principle

Chu, Enhui; Zhang, Xing; Sun, Qiuye; Li, Si; Xiong, Huiming; Yang, Xiaochen

doi:10.1049/iet-pel.2015.0393

Cited by 24 publications

(11 citation statements)

References 26 publications

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“…Refs [31–33] inherited the characteristics of the auxiliary resonant converter. Compared with the resonant DC link, the topology of the auxiliary resonant converter is complex, but it has independent auxiliary circuits for each item, its operating time is short, and its utilization of the DC bus voltage is higher, so the auxiliary resonant converter is commonly used in high‐power converters.…”

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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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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“…Cai et al (2019) proposed a novel ARCP inverter that achieved good results by replacing the position of the midpoint capacitor with a switching device. Chu et al (2014) and Chu et al (2016) also utilized switching devices for current conversion, but too many auxiliary devices increase the 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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“…When the DC‐link voltage periodically changes to the zero state, the main switch of the inverter completes zero‐voltage soft‐switching, which can reduce the switching loss, but the zero state periodically formed by the DC‐link voltage can reduce the DC voltage utilisation rate of the inverter. The auxiliary circuit of the resonant‐pole inverter is located on each phase bridge arm of the inverter [9–25], which makes the switching devices realise soft‐switching and cannot affect the DC voltage utilisation rate of the inverter. Hence, in recent years, more and more attention has been paid to the research on resonant‐pole inverters, and researchers have proposed a variety of topologies of resonant‐pole inverters, but in order to accelerate the popularisation and application of resonant‐pole inverters, the topology still needs to be further optimised.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, in recent years, more and more attention has been paid to the research on resonant‐pole inverters, and researchers have proposed a variety of topologies of resonant‐pole inverters, but in order to accelerate the popularisation and application of resonant‐pole inverters, the topology still needs to be further optimised. Each phase auxiliary circuit of the resonant‐pole inverter proposed in [9–16] contains at least two auxiliary switches. Compared with the traditional three‐phase hard‐switching inverter, the operation efficiency has been improved, but at least six auxiliary switches have been added, and the duty cycle of the trigger pulse of each auxiliary switch should change in real time according to the instantaneous value of the load current, which requires the high‐precision load current detection link.…”

Section: Introductionmentioning

confidence: 99%

Three‐phase efficient resonant‐pole inverter without auxiliary switches

Wang

2020

IET power electron.

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In order to optimise, the operating efficiency of the three‐phase inverter, a new three‐phase efficient resonant‐pole inverter without auxiliary switches is presented. A set of auxiliary circuits without auxiliary switches is set on each phase bridge arm. When the auxiliary circuit works in the inverter commutation process, the main switch device on the bridge arm can achieve zero‐current turn‐on and zero‐voltage turn‐off, and the efficiency of the inverter can be improved by reducing the switching loss. Furthermore, there are no auxiliary switches in the auxiliary circuit, which is conducive to limiting the hardware cost of the auxiliary circuit and improving the reliability of the inverter. This study analyses the working mode of the circuit and the realisation condition of soft switching. The experimental results on the 3 kW prototype indicate that the switching device is in the state of soft switching, and the efficiency of the prototype at the rated output power is equal to 98.9%, which is more than that of other similar soft‐switching inverters. Consequently, the presented topology is significant for the research and development of efficient three‐phase inverters.

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Three‐phase double auxiliary resonant commutated pole inverter topology and analysis of its working principle

Cited by 24 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

Three‐phase efficient resonant‐pole inverter without auxiliary switches

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