Resonant Inductance Design and Loss Analysis of a Novel Resonant DC Link Inverter

Chu, Enhui; Xie, Haolin; Bao, Jiaqi; Chen, Zhifang; Kang, Yunjing

doi:10.1109/tpel.2019.2924252

Cited by 23 publications

(2 citation statements)

References 27 publications

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“…Resonant DC-link inverters (RDCLI) [6,7] and resonant pole inverters (RPI) [8,9] comprise the majority of soft-switching inverters. RDCLI typically entails connecting a resonant branch, which has the benefits of a straightforward circuit and inexpensive cost, between the DC bus and the traditional inverter.…”

Section: Introductionmentioning

confidence: 99%

A simple zero-voltage switching technique for a single-phase inverter based on bi-directional inductor current

Wu,

Zhao

2024

J. Phys.: Conf. Ser.

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The majority of soft-switching inverters often use auxiliary semiconductor switches that run for extremely brief periods to provide ZVS conditions for the main switches, potentially raising the inverter system’s cost. This work presented a simple zero-voltage switching (ZVS) approach by employing a bi-directional inductor current for the single-phase inverter, which reduced the cost of auxiliary switches and simplified the soft-switching inverter design. All switches can achieve ZVS operation without additional resonant components. The conventional PWM control strategies are applied in the proposed technique, and thus the problems existing in variable switching frequency converters are removed. This article describes the soft-switching approach and detailed circuit functioning. Different key parameters are optimized to improve efficiency. To confirm the suggested ZVS method, a hardware inverter prototype is created, built, and tested. To validate the inverter’s characteristics and validity, experimental results are presented.

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Section: Introductionmentioning

confidence: 99%

A simple zero-voltage switching technique for a single-phase inverter based on bi-directional inductor current

Wu,

Zhao

2024

J. Phys.: Conf. Ser.

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“…Resonant DC‐link inverters and resonant‐pole inverters are two main types of soft‐switching inverters. The auxiliary circuit of the resonant DC‐link inverter is located in the DC link [3–8]. 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.…”

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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