A new soft-switching solution in three-level neutral-point-clamped voltage source inverters
Authors:
- Zbigniew Szular,
- Bartosz Rozegnal,
- Witold Mazgaj
Abstract
This paper presents a new soft-switching solution recommended for three-level neutral-point-clamped inverters. The operation principles of the proposed solution, working stages, selection of elements, and the control algorithm are comprehensively discussed herein. The control method of the inverter main switches is the same as that of the switches of an inverter operating according to the hard-switching technique. The correctness of the proposed solution was confirmed by the results of different tests using a laboratory neutral-point-clamped inverter with rated parameters of 3 kW, 2 × 150 V, 12 A, and 3 kHz. Numerical analyses were performed for the inverter of rated power 1.2 MW. The switching losses of the inverter operating with the proposed solution were compared with those of an inverter with hard-switching method. The proposed soft-switching solution increased the inverter efficiency and its competitiveness in relation to other proposals because there were no connections between switches and capacitors or inductors, which pose a risk of damaging the inverter when disturbances in the control system appear.
- Record ID
- CUTae880ea5fd0249b39fb2a4a758a1a18b
- Publication categories
- ;
- Author
- Journal series
- Energies, ISSN , e-ISSN 1996-1073, Biweekly
- Issue year
- 2021
- Vol
- 14
- No
- 8
- Pages
- [1-23]
- Article number
- 2247
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 22-23; Bibliografia (liczba pozycji) - 22; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 14, Iss. 8
- Substantive notes
- Section: Electrical Power and Energy System
- Keywords in English
- neutral-point-clamped inverter, soft-switching, switching losses, three-level inverter
- DOI
- DOI:10.3390/en14082247 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1073/14/8/2247 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTae880ea5fd0249b39fb2a4a758a1a18b/
- URN
urn:pkr-prod:CUTae880ea5fd0249b39fb2a4a758a1a18b
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.