Resonant DC link soft-switching inverter with low-loss auxiliary circuit

Wang, Qiang; Wang, Youzheng

doi:10.1080/00207217.2019.1600743

Cited by 13 publications

(2 citation statements)

References 16 publications

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“…The switching loss has a direct relationship with the frequency of operation in a hard switched power converters. Therefore, soft switched resonant power converters are getting more attention (Ayyanar & Mohan, 2001;Pajnic et al, 2017;Reusch & Strydom, 2015;Wang & Wang, 2019;Witulski et al, 1991;Wu et al, 2015;Yadav & Narasamma, 2014) in order to reduce these losses.…”

Section: Introductionmentioning

confidence: 99%

Contribution of leakage flux to the total losses in transformers with magnetic shunt

Bakar

Haller

Bertilsson

2020

International Journal of Electronics

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To execute soft switching methods in resonant power converters, transformers with larger leakage inductance are getting more attention. Many papers have constructed various concepts in this regard. However, a discussion about, how the transformer efficiency is affected is lacking in the literature. This paper analyses the effects of the increased leakage inductance on the performance of the transformer. A transformer for increased leakage inductance is modelled and constructed to investigate the losses. The model discusses the effects of increased leakage inductance either by increasing the inter-winding spacing or by integrating the magnetic shunt within the transformer. The investigations show that increasing the leakage inductance by inserting a magnetic shunt can have severe degrading effects on the performance of the transformer, if not designed adequately. Additional losses are also calculated and the effects are verified by the experiments.

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Section: Introductionmentioning

confidence: 99%

Contribution of leakage flux to the total losses in transformers with magnetic shunt

Bakar

Haller

Bertilsson

2020

International Journal of Electronics

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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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Efficient single-phase full-bridge soft-switching inverter

Wang

2021

J. Power Electron.

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Resonant DC link soft-switching inverter with low-loss auxiliary circuit

Cited by 13 publications

References 16 publications

Contribution of leakage flux to the total losses in transformers with magnetic shunt

Contribution of leakage flux to the total losses in transformers with magnetic shunt

Three‐phase efficient resonant‐pole inverter without auxiliary switches

Efficient single-phase full-bridge soft-switching inverter

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