Representation of directly connected and drive-controlled induction motors. Part 1: Single-phase load models

This paper is part one of a two part series, which discusses steady state load models of directly connected and drive-controlled single-phase and three-phase induction motors. The presented analysis compares changes in their active and non-active power demand characteristics with the variations in supply system voltage and mechanical loading conditions. From the presented analysis, analytical expressions and equivalent load models are developed for several typical motor-drive configurations.