Abstract
This paper describes a transformer less medium voltage adjustable-speed induction motor drive consisting of two five-level diode-clamped converters connected back-to-back. It deals mainly with the voltage balancing problem that occurs when split dc capacitors are used. The switching methods by which this problem can be reduced is being described in this work. Space vector PWM is used ahead of multi carrier pulse width modulation. The harmonic values of voltage and current waveforms of the induction motor output were reduced by using the space vector PWM switching method.
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