A new medium voltage PWM inverter topology for adjustable speed drives

Author

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

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

2

fYear

1998

fDate

12-15 Oct. 1998

Firstpage

1416

Abstract

In this paper a new PWM inverter topology suitable for medium voltage (2300/4160 V) adjustable speed drive (ASD) systems is proposed. The modular inverter topology is derived by combining three standard 3-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 3-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

AC motor drives; PWM invertors; transformers; variable speed drives; 18-pulse input transformer; 2300 V; 3-phase inverter modules; 4160 V; adjustable speed drives; clean power utility interface; constant torque loads; high quality output voltage; medium voltage PWM inverter topology; modular inverter topology; multistep PWM output voltage; output transformer; variable torque loads; Costs; Insulated gate bipolar transistors; Medium voltage; Power quality; Power transformer insulation; Pulse width modulation; Pulse width modulation inverters; Topology; Torque; Variable speed drives;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1998. Thirty-Third IAS Annual Meeting. The 1998 IEEE

Conference_Location

St. Louis, MO, USA

ISSN

0197-2618

Print_ISBN

0-7803-4943-1

Type

conf

DOI

10.1109/IAS.1998.730328

Filename

730328