NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power Decoupling
This paper presents a novel concept of the DC-AC system with the input voltage boost ability, seven-level output voltage modulation, and the input AC current reduction at the double frequency of the output voltage. The system integrates the NPC full-bridge inverter which is composed of four-level le...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/10/3729 |
| _version_ | 1797500095450578944 |
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| author | Robert Stala Jakub Hachlowski Adam Penczek |
| author_facet | Robert Stala Jakub Hachlowski Adam Penczek |
| author_sort | Robert Stala |
| collection | DOAJ |
| description | This paper presents a novel concept of the DC-AC system with the input voltage boost ability, seven-level output voltage modulation, and the input AC current reduction at the double frequency of the output voltage. The system integrates the NPC full-bridge inverter which is composed of four-level legs and an active input voltage balancer (AIVB). The DC-link is composed of three capacitors connected in a series. The source of the energy is connected directly to the middle capacitor while the upper and lower capacitors of the DC-link are charged by the AIVB. The operation of the AIVB leads to balancing of the DC-link voltage and a three-fold boosting of the input voltage. The AIVB utilizes a novel switched-capacitor (SC) topology and can be designed as a low-volume quasi-magneticless converter with a simple open-loop control. One of the proposed methods of the control of the AIVB allows for a double frequency reduction in the input current. The application of the AIVB allows for the use of a seven-level NPC full-bridge (FB) inverter with a simple classic carrier-based PWM which is not applicable in the typical DC-link configurations. This paper presents the converter’s concept, its operation, control methods, and the results of simulations and experiments. |
| first_indexed | 2024-03-10T03:56:58Z |
| format | Article |
| id | doaj.art-495ffb8f25df45cf8b7ca441e5dea11b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T03:56:58Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-495ffb8f25df45cf8b7ca441e5dea11b2023-11-23T10:52:18ZengMDPI AGEnergies1996-10732022-05-011510372910.3390/en15103729NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power DecouplingRobert Stala0Jakub Hachlowski1Adam Penczek2Department of Power Electronics and Energy Control Systems, Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, PolandDepartment of Power Electronics and Energy Control Systems, Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, PolandDepartment of Power Electronics and Energy Control Systems, Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, PolandThis paper presents a novel concept of the DC-AC system with the input voltage boost ability, seven-level output voltage modulation, and the input AC current reduction at the double frequency of the output voltage. The system integrates the NPC full-bridge inverter which is composed of four-level legs and an active input voltage balancer (AIVB). The DC-link is composed of three capacitors connected in a series. The source of the energy is connected directly to the middle capacitor while the upper and lower capacitors of the DC-link are charged by the AIVB. The operation of the AIVB leads to balancing of the DC-link voltage and a three-fold boosting of the input voltage. The AIVB utilizes a novel switched-capacitor (SC) topology and can be designed as a low-volume quasi-magneticless converter with a simple open-loop control. One of the proposed methods of the control of the AIVB allows for a double frequency reduction in the input current. The application of the AIVB allows for the use of a seven-level NPC full-bridge (FB) inverter with a simple classic carrier-based PWM which is not applicable in the typical DC-link configurations. This paper presents the converter’s concept, its operation, control methods, and the results of simulations and experiments.https://www.mdpi.com/1996-1073/15/10/3729NPC invertermultilevel inverterfour-level inverterseven-level invertersingle-phase inverterDC-link voltage balancing |
| spellingShingle | Robert Stala Jakub Hachlowski Adam Penczek NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power Decoupling Energies NPC inverter multilevel inverter four-level inverter seven-level inverter single-phase inverter DC-link voltage balancing |
| title | NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power Decoupling |
| title_full | NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power Decoupling |
| title_fullStr | NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power Decoupling |
| title_full_unstemmed | NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power Decoupling |
| title_short | NPC Seven-Level Single-Phase Inverter with DC-Link Voltage Balancing, Input Voltage Boosting, and AC Power Decoupling |
| title_sort | npc seven level single phase inverter with dc link voltage balancing input voltage boosting and ac power decoupling |
| topic | NPC inverter multilevel inverter four-level inverter seven-level inverter single-phase inverter DC-link voltage balancing |
| url | https://www.mdpi.com/1996-1073/15/10/3729 |
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