Investigation of power converters for use in industrial drive applications finds that these converters are used low reliable components. To overcome this issue

in this paper

advanced power converters (multi-pulse AC–DC and multilevel DC–AC converter) are developed and implemented to feed vector-controlled induction motor drive (VCIMD)

which enhance power quality of medium voltage drive system. Multi-winding transformers with multiphase conversion as well as phase displacement technique for multi-pulse AC–DC converters are designed. Hence

to attain high power quality at grid side

while drive system is designed with the few numbers of DC sources

a multiphase conversion and phase displacement techniques-based 50-pulse rectification system is designed and developed here. For it

circuit structure of five multi winding transformers (T1

T2

T3

T4

T5) is developed through phase displacement and multiphase conversion (3- phase to 5-phase) technique instead utilising low reliability components. Apart from this

to overcome the challenges at the drive side

a six-level cascaded multilevel inverter is developed with a low number of components. The rigorous design of a 50-pulse AC–DC converter and six-level cascaded inverter-based medium voltage drive system is made and responses of this system are analysed through experiments (7.5 kW IM) at various operating conditions. In verification processes

operation principle and impact of converters utilisation are clearly analysed. More importantly

using proposed circuitry

the input current is almost sinusoidal; its input current total harmonic distortion is less than 5%. Hence

the presented drive system addresses power quality standard IEEE 519 in the system.