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Comparison of High-Power 2-Level and 3-Level Converters in Terms of Power Density, Costs and Performance
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| Author(s) |
Ludwig SCHLEGEL |
| Abstract |
This paper compares high-power converters in terms of their power density, costs and performance.2-level and 3-level NPC phase modules with 1400A semiconductors are compared. For pulse frequencies higher than 6.75 kHz 3-level NPC converter is twice smaller and 48\% cheaper then 2-level converter, because for 2-level parallel operation of phase modules is necessary. In this case the 3-level NPC has with 0.58 kVA/dm³ a twice higher power density as the 2-level converter. The performance of 3-level NPC is much higher than of the 2-level, because of the twice higher possible pulse frequency of 16 kHz and therefore higher possible control frequency. Because of the higher pulse frequency and the lower voltage ripple the chokes can be quite smaller for the 3-level NPC and so the maximum current raise is a lot higher than in case of a 2-level converter. |
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| Filename: | 0567-epe2022-full-15073438.pdf |
| Filesize: | 2.221 MB |
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| Type |
Members Only |
| Date |
Last modified 2023-09-24 by System |
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