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- Title
Improved "K" type seven‐level switched capacitor inverter topology with Self‐voltage balancing.
- Authors
Jagabar Sathik, M.; Sandeep, N.; Almakhles, Dhafer; Blaabjerg, Frede
- Abstract
Summary: This paper proposes an improved "K" type seven‐level switched capacitor inverter topology. The proposed topology consists of eight active switches, one floating capacitor, and two dc‐link capacitors. The floating capacitors are charged and discharged in each half‐cycle to maintain the capacitor voltage with the same value of the input voltage. The floating capacitor voltage is self‐balanced, and the output voltage is 1.5 times higher than the input voltage. To prove the superiority of the proposed topology, it is compared with the existing seven‐level inverters in terms of maximum voltage stress on the switch and required the number of power components. The simulation and experimental validation are carried out for 1.6 kW, 50 Hz using a laboratory‐based setup with a switching frequency of 5 kHz. The results are discussed highlighting the performance of the proposed topology for the dynamic load variations at different modulation indices. Both simulation results and experimental results have good agreement in terms of voltage balancing of flying capacitor.
- Subjects
CAPACITOR switching; TOPOLOGY; DYNAMIC loads; CAPACITORS; ELECTRIC potential
- Publication
International Journal of Circuit Theory & Applications, 2020, Vol 48, Issue 10, p1800
- ISSN
0098-9886
- Publication type
Article
- DOI
10.1002/cta.2811