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Abstract
This letter investigates the loss and thermal behaviors of a three-level neutral-point-clamped (3L-NPC) inverter undergoing moderate modulation index, which is typically presented during minor voltage sags of the power grid or speed changes of the electric machines. A series of new space vector modulation methods is then proposed to relocate the thermal loading among the power devices. It is concluded that, with some of the proposed modulation methods, the device loading in the 3L-NPC inverter can be effectively modified and optimized, and the junction temperature of the most stressed devices can be also relieved. The control ability of DC-bus midpoint potential, which is one of the crucial considerations for the 3L-NPC topology, is also investigated when applying the proposed modulation methods.
Original language | English |
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Journal | I E E E Transactions on Power Electronics |
Volume | 31 |
Issue number | 1 |
Pages (from-to) | 5-10 |
Number of pages | 6 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - Jan 2016 |
Keywords
- Modulation
- Neutral point current
- Space vector modulation (SVM)
- Three-level neutral-point-clamped (3L-NPC)
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Dive into the research topics of 'Modulation Methods for Three-level Neutral-Point-Clamped Inverter Achieving Stress Redistribution under Moderate Modulation Index'. Together they form a unique fingerprint.Projects
- 1 Finished
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Center Of Reliable Power Electronics (CORPE)
Blaabjerg, F., Munk-Nielsen, S., Pedersen, K. & Popok, V.
01/04/2011 → 31/12/2016
Project: Research