This paper presents schema of operation for floating voltage source multilevel inverters. The primary advantage of the proposed schema is that the number of voltage levels (and thus power quality) can be increased for a given number of semiconductor devices when compared to the conventional "flying capacitor" topology. However, the new schema requires fixed floating sources instead of capacitors and therefore is more suitable for battery power applications such as electric vehicles, flexible AC transmission systems and submarine propulsion. Alternatively transformer/rectifier circuits may be used to supply the floating sources in a similar way to cascaded H-bridge inverters. Computer simulation results are presented for 4-level, 8-level, and 16-level inverter topologies. A 4-level laboratory test verifies the proposed method.


Electrical and Computer Engineering

Keywords and Phrases

16-Level Inverter; 4-Level Inverter; 8-Level Inverter; PWM Invertors; Battery Power Applications; Cascaded H-Bridge Inverters; Electric Vehicles; Flexible AC Transmission Systems; Floating Voltage Source Multilevel Inverters; Flying Capacitor Topology; Full Binary Combination Schema; Power Quality; Pulse-Width Modulation; Semiconductor Devices; Submarine Propulsion; Transformer/Rectifier Circuits; Voltage Levels; Voltage-Source

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2002 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2002