Title :
A three-phase multilevel converter for high-power induction motors
Author :
Schibli, Nikolaus P. ; Nguyen, Tung ; Rufer, Alfred C.
Author_Institution :
Fed. Inst. of Technol., Lausanne, Switzerland
fDate :
9/1/1998 12:00:00 AM
Abstract :
A new converter topology for drives is presented in this paper: a three-phase multilevel converter with separately regulated DC power supplies. The DC voltages are provided by medium-frequency DC-DC converters. The applications for the converter are especially high-power traction systems, where the voltage applied to the induction motor is bigger than 1 kV. The motor current is of a very high quality, compared to a classical three-phase converter. This allows keeping the switching frequency low by using phase-shifted pulsewidth modulation (PWM) carriers. Different modulation methods have been developed and simulated. Experimental tests have been made on a 12 kW prototype
Keywords :
DC-DC power convertors; PWM power convertors; induction motor drives; power supplies to apparatus; traction motor drives; 12 kW; DC voltages; drives; high-power induction motors; high-power traction systems; medium-frequency DC-DC converters; modulation methods; motor current; phase-shifted PWM carriers; separately regulated DC power supplies; three-phase multilevel converter; DC-DC power converters; Induction motors; Phase modulation; Power supplies; Pulse width modulation; Space vector pulse width modulation; Switching frequency; Topology; Traction motors; Voltage;
Journal_Title :
Power Electronics, IEEE Transactions on
