Abstract: “This paper illustrates the importance of controllers on energy saving opportunity of a partially loaded three-phase induction motor drive in variable load and speed applications. An overview of various controllers: loss model controller, search controller and their hybridization are given. Fuzzy Pre-Compensated Proportional Integral (FPPI) is used to improve motor's dynamic performances during the activation of optimal energy controllers. The economics of a 100 HP induction motor is investigated with two topologies namely constant Volt/frequency (V/f) controller and Particle Swarm Optimization (PSO) controller in steady-state conditions. In this study, the flux level in a machine has been considered to be adjusted to give minimum operating cost for a given load/speed.”

Keywords: mine hoist, particle swarm optimization, loss model controller,