A new medium-voltage PWM inverter topology for adjustable-speed drives

Author

Cengelci, E. ; Sulistijo, S.U. ; Woo, B.O. ; Enjeti, P. ; Teoderescu, R. ; Blaabjerg, Frede

Author_Institution

Power Electron. Lab., Texas A&M Univ., College Station, TX, USA

Volume

35

Issue

3

fYear

1999

Firstpage

628

Lastpage

637

Abstract

In this paper, a new pulsewidth modulation (PWM) inverter topology suitable for medium-voltage (2300/4160 V) adjustable-speed drive systems is proposed. The modular inverter topology is derived by combining three standard three-phase inverter modules and a 0.33-pu output transformer. The output voltage is high-quality multistep PWM with low dv/dt. Further, the approach also guarantees balanced operation and 100% utilization of each three-phase inverter module over the entire speed range. These features enable the proposed topology to be suitable for powering constant-torque, as well as variable-torque type loads. Clean power utility interface of the proposed inverter system can be achieved via an 18-pulse input transformer. Analysis, simulation and experimental results are shown to validate the concepts

Keywords

DC-AC power convertors; PWM invertors; load (electric); power transformers; variable speed drives; 18-pulse input transformer; 2300 V; 4160 V; MV PWM inverter topology; adjustable speed drives; applications; balanced operation; constant-torque loads; high-quality multistep PWM output voltage; modular inverter topology; output transformer; speed range; variable-torque loads; Costs; Insulated gate bipolar transistors; Medium voltage; Power quality; Power transformer insulation; Pulse width modulation; Pulse width modulation inverters; Thyristors; Topology; Variable speed drives;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.767014

Filename

767014