Title :
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
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;
Journal_Title :
Industry Applications, IEEE Transactions on
