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

To realize a soft-switching inverter with the advantages of a simple structure, high efficiency, low-voltage stress, and easy to control, a novel parallel resonant dc-link inverter with the function of pulse current regeneration is proposed in this paper. All switches in the inverter main circuit ca...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2020-02, Vol.35 (2), p.1392-1405
Main Authors: Chu, Enhui, Xie, Haolin, Bao, Jianqun, Chen, Zhifang, Kang, Yunjing
Format: Article
Language:English
Subjects:
Capacitors
Circuits
Commutation
Design parameters
Diodes
Electric potential
Equivalent circuits
Inductance
Inductors
Insulated gate bipolar transistors
Parallel resonant
Regeneration
resonant dc-link inverter
Resonant inverters
reverse recovery
Semiconductor devices
Soft switching inverters
Switches
Turning
Voltage
Zero voltage switching
zero-current switching (ZCS)
zero-voltage switching (ZVS)
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Summary:To realize a soft-switching inverter with the advantages of a simple structure, high efficiency, low-voltage stress, and easy to control, a novel parallel resonant dc-link inverter with the function of pulse current regeneration is proposed in this paper. All switches in the inverter main circuit can achieve zero-voltage switching (ZVS) turn- on and ZVS turn- off . In addition, all switches in the auxiliary commutation circuit (ACC) can achieve soft switching. The power in the ACC is small. Freewheeling diodes in the inverter turn off under zero current condition, which can reduce the reverse recovery loss of freewheeling diodes. In addition, the bulk capacitors are avoided in the circuit and there is no neutral point potential variation problem. At the same time, the zero-voltage duration is independent of the load current, and the time of transition can be selected freely. According to the equivalent circuits in different operation modes under the proposed modulation strategy, the operation principle, soft-switching implementation condition, and parameter design procedure of the proposed inverter are analyzed successively in this paper. Finally, a 10 kW, 10 kHz soft-switching inverter prototype with insulated gate bipolar transistor based switches is built. Experimental results are given to demonstrate the validity and features of the soft-switching inverter.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2019.2924252