Title :
VSI-PWM rectifier/inverter system with a reduced switch count
Author :
Kim, Gi-Taek ; Lipo, Thomas A.
Author_Institution :
Dept. of Control & Instrum. Eng., Kangwon Nat. Univ., Chunchon, South Korea
Abstract :
A current-controlled VSI-PWM rectifier and inverter with capacitor DC link is regarded as one of the most important structures for three-phase to three-phase power conversion. This type of power converter normally requires twelve switches for the rectifier and an inverter composed of self turnoff switch such as a bipolar transistor or an IGBT with an anti-parallel diode. In this paper, a new three-phase to three-phase AC/AC power converter for AC motor drives is proposed. The proposed power converter employs only eight switches and has the capability of delivering sinusoidal input currents with unity power factor and bidirectional power flow. This paper describes the feasibility and the operational limitations of the proposed structure. A mathematical model of the system is derived using the generalized modulation theory and experimental results for steady-state and dynamic behavior are presented to verify the developed model
Keywords :
AC motor drives; AC-AC power convertors; AC-DC power convertors; DC-AC power convertors; PWM invertors; field effect transistor switches; power MOSFET; power field effect transistors; power semiconductor switches; rectifying circuits; switching circuits; PWM rectifier/inverter system; bidirectional power flow; capacitor DC link; current-controlled power convertor; dynamic behavior; generalized modulation theory; mathematical model; sinusoidal input currents; steady-state behavior; switches; three-phase to three-phase AC/AC power converter; unity power factor; Bipolar transistors; Capacitors; Diodes; Insulated gate bipolar transistors; Inverters; Mathematical model; Power conversion; Rectifiers; Switches; Switching converters;
Journal_Title :
Industry Applications, IEEE Transactions on
