Exploring the operational characteristics of a three-phase induction motor with multi-zone stator windings

The possibility of increasing the operating characteristics of the induction motor by using three-phase multizone stator windings has been studied. A development has established that by working with a three-phase network implies four types of the stator winding design, schemes for laying single-layer, one-two-layer and two-layer windings for stators with a number of grooves from twelve to 90. The induction motor field model in the ANSYS Maxwell package and the dependences of the performance characteristics for the motor with the 0.55 kW power on the distribution of the rated power between sets of three-phase windings have been studied for the induction motor characteristics analysis with the proposed winding. Design recommendations for the asymmetric multi-zone stator winding, depends on the induction motor operating conditions are developed. The carried out experimental researches confirm that the usage of the developed winding allows to increase the inducted motors energy characteristics.

I. Introduction

International standard IEC 60034 encourages manufacturers to search for new ways to reduce losses in electrical machines. Traditionally, this effect is achieving by increasing the mass of active materials, improving their quality, optimizing the tooth zone, bearing assembly, improving ventilation, or using a copper rotor. All this, in combination with the special designed technics allow you to increase the nominal efficiency by 3-5%, while significantly rise the cost of the induction motor itself.