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Performance Evaluation of Medium-Power Voltage Inverters
Linköping University, Department of Electrical Engineering, Integrated Circuits and Systems. Linköping University, Faculty of Science & Engineering.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Power inverters, used to convert DC power to AC, are often used in e.g. solar power applications. However, they tend to be impractically large and expensive; as such, power miniaturization is an active research area. In this thesis, several classes of modern power inverters are evaluated and compared with regards to size, efficiency and output quality in order to identify areas of potential improvement. Methods for estimation of THD, power losses and input ripple are created and verified against a simulation of a five-level neutral-point-clamped inverter with SPWM control. Finally, this design is implemented physically and is found to achieve 94.5% efficiency and 7% THD under low voltage laboratory conditions, while remaining smaller than an average textbook.

Place, publisher, year, edition, pages
2015. , 52 p.
Keyword [en]
Inverter, neutral-point clamped, SPWM, switching losses, input ripple, total harmonic distortion
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:liu:diva-118568ISRN: LiTH-ISY-EX--15/4828--SEOAI: diva2:818221
Subject / course
Electrical Engineering
2015-05-19, 13:00 (English)
Available from: 2015-06-08 Created: 2015-06-01 Last updated: 2015-06-08Bibliographically approved

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fulltext(1771 kB)226 downloads
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Häger, Emil
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Integrated Circuits and SystemsFaculty of Science & Engineering
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