Conference proceedings article
Quasi-Two-Level PWM-Operated Modular Multilevel Converter with Non-Linear Branch Inductors
Publication Details
Authors: | Kucka, J.; Lin, S.; Friebe, J.; Mertens, A. |
Editor: | European Centre for Creative Economy |
Publisher: | Institute of Electrical and Electronics Engineers Inc |
Place: | United States |
Publication year: | 2019 |
Pages range : | TBD |
Book title: | 2019 21st European Conference on Power Electronics and Applications EPE 2019 ECCE Europe |
Title of series: | 2019 21st European Conference on Power Electronics and Applications EPE 2019 ECCE Europe |
DOI-Link der Erstveröffentlichung: |
Abstract
Quasi-two-level PWM operation of modular multilevel converters enables very low module capacitance even at low machine speeds and high torques while the current distortion is tolerable. In this paper the application of non-linear inductors together with this operation mode is investigated to further decrease the module capacitances. The requirements for the inductors are analytically derived and the design of the non-linear inductors using a stepped air gap is demonstrated. The feasibility and the advantages of quasi-two-level PWM operation with non-linear inductors are validated using simulations and a laboratory prototype.
Quasi-two-level PWM operation of modular multilevel converters enables very low module capacitance even at low machine speeds and high torques while the current distortion is tolerable. In this paper the application of non-linear inductors together with this operation mode is investigated to further decrease the module capacitances. The requirements for the inductors are analytically derived and the design of the non-linear inductors using a stepped air gap is demonstrated. The feasibility and the advantages of quasi-two-level PWM operation with non-linear inductors are validated using simulations and a laboratory prototype.
Keywords
Emerging topology Multilevel converters Pulse width modulation (PWM) Variable speed drive
