Title :
Multilevel inverter with series connection of H-bridge cells
Author :
Lin, Bor-Ren ; Chien, Yuan-Po ; Lu, Hsin-Hung
Author_Institution :
Lab. of Power Electron. Res., Nat. Yunlin Univ. of Sci. & Technol., China
Abstract :
A novel AC/DC/AC converter topology, a three-phase switching mode rectifier (SMR) and a three-phase multilevel inverter with separate DC power supplies, is proposed in this paper. To improve the power quality, three-phase SMR is adopted to supply sinusoidal wave with high power factor and current distortion. The separate DC bus voltages are provided by switching mode DC-DC converters. The full-bridge cells are adopted to provide multilevel line voltage. The control schemes of three-phase multilevel inverter are based on look-up table with sine-triangular PWM method. The voltage unbalance problem between the separate DC bus voltages is improved by using the proposed control scheme. The proposed AC/DC/AC converter is verified by computer simulations
Keywords :
DC-DC power convertors; bridge circuits; invertors; power factor; power supplies to apparatus; power supply quality; rectifying circuits; switching circuits; AC/DC/AC converter topology; DC bus voltages; DC power supplies; H-bridge cells; computer simulations; current distortion; full-bridge cells; high power factor; multilevel inverter; multilevel line voltage; power quality improvement; series connection; sine-triangular PWM method; sinusoidal wave supply; switching mode DC-DC converters; three-phase multilevel inverter; three-phase switching mode rectifier; voltage unbalance problem; Analog-digital conversion; DC-DC power converters; Power quality; Power supplies; Pulse width modulation inverters; Reactive power; Rectifiers; Switching converters; Topology; Voltage;
Conference_Titel :
Power Electronics and Drive Systems, 1999. PEDS '99. Proceedings of the IEEE 1999 International Conference on
Print_ISBN :
0-7803-5769-8
DOI :
10.1109/PEDS.1999.792819
