A NOVEL CONTROL APPROACH TOAA THREE-PHASE INDUCTION MOTOR WITH OPEN-ENDED CONTROL, FED BY AN INFINITE-LEVEL INVERTER (ILI) WITH VECTOR AND SCALAR CONTROL

Abstract

This article describes the design and performance study of an openended, three-phase induction motor that is powered by an infinite
level inverter (ILI) and has its speed controlled using both direct
vector and scalar control methods. The ILI is a part of the ReducedDevice-Count (RDC) Active-Front-End (AFE) Multi-level Inverter
(MLI) architecture. This inverter topology's basic components are an
H-bridge and a dc-to-dc buck converter. With this architecture, there
are no concerns with reverse recovery or shoot-through, allowing for
high-quality power conversion. Using a resistive load, the suggested
topology's performance is verified. The voltage waveform obtained
has an output THD of 1.2%. Furthermore, there has been a high level
of dc-source voltage consumption with this configuration. Because
just one high-frequency switch is run at a time per phase while the
other switches are operated at power frequency, ILI significantly
lowers switching and conduction losses. The inverter has a 98% total
efficiency. Using scalar and direct vector control approaches, the
speed control performance of the ILI architecture with a three-phase
open-ended induction motor has been further confirmed. Verification
of simulation study results is done by experimentation.