Yang, Peng  ORCID: https://orcid.org/0000-0002-8429-7598, Ming, Wenlong ORCID: https://orcid.org/0000-0003-1780-7292, Liang, Jun ORCID: https://orcid.org/0000-0001-7511-449X and Wu, Jianzhong ORCID: https://orcid.org/0000-0001-7928-3602
2019.
A SiC-based neutral leg for the three-phase four-wire inverter.
Presented at: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society,
Lisbon, Portugal,
14-17 October 2019.
IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society.
IEEE,
pp. 1555-1560.
10.1109/IECON.2019.8927531
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Abstract
SiC-based inverters can operate at high switching frequency with high efficiency, which can reduce the size of passive components and heat sinks to achieve high power density. However, in three-phase four-wire inverters supplying unblanced loads, the second-order ripples in the DC bus need to be mitigated by large DC capacitance, which increases the size of the converter. The conventional neutral leg is widely used in three-phase four-wire inverters to provide neutral currents for the unbalanced loads. In this paper, an improved neutral leg is proposed, which can provide neutral currents and reduce the second-order ripples in the DC bus simultaneously. The DC bus ripples can be reduced without adding any hardware components. Furthermore, the proposed neutral leg can save 50% DC capacitance comparing to the conventional neutral leg. The proposed neutral leg was built with SiC MOSFETs and tested with a three-phase four-wire inverter in the laboratory. The experimental results verified the effectiveness of the proposed neutral leg.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Published Online |
| Status: | Published |
| Schools: | Schools > Engineering |
| Publisher: | IEEE |
| ISBN: | 9781728148786 |
| Date of First Compliant Deposit: | 20 May 2020 |
| Date of Acceptance: | 9 December 2019 |
| Last Modified: | 05 Dec 2023 02:52 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/131658 |
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