SVPWM Overmodulation Scheme of Three-Level Inverters for Vector Controlled Induction Motor Drives


Vol. 9, No. 3, pp. 481-490, May  2009
10.6113/JPE.2009.9.3.481


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 Abstract

This paper describes a SVPWM overmodulation scheme of NPC type three-level inverter for traction drives which extends the modulation index from MI=0.907 to unity . SVPWM strategy is organized by two operation modes of under-modulation and over-modulation. The switching states under the under-modulation modes are determined by dividing them with two linear regions and one hybrid region the same as the conventional three-level inverter. On the other hand, under the over-modulation mode, they are generated by doing it with two over-modulation regions the same as the conventional over-modulation strategy of a two level inverter. Following the description of over-modulation scheme of a three-level inverter, the system description of a vector controlled induction motor for traction drives has been discussed. Finally, the validity of the proposed modulation algorithm has been verified through simulation and experimental results.


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Cite this article

[IEEE Style]

K. Kwon, J. Lee, J. Lee, J. Choi, "SVPWM Overmodulation Scheme of Three-Level Inverters for Vector Controlled Induction Motor Drives," Journal of Power Electronics, vol. 9, no. 3, pp. 481-490, 2009. DOI: 10.6113/JPE.2009.9.3.481.

[ACM Style]

Kyoung-Min Kwon, Jae-Moon Lee, Jin-Mok Lee, and Jaeho Choi. 2009. SVPWM Overmodulation Scheme of Three-Level Inverters for Vector Controlled Induction Motor Drives. Journal of Power Electronics, 9, 3, (2009), 481-490. DOI: 10.6113/JPE.2009.9.3.481.