Tree-phase bipolar pattern single-layer winding of an induction motor

Authors

  • M. Zablodsky National University of Life and Environmental Sciences of Ukraine image/svg+xml
  • R. Chuienko National University of Life and Environmental Sciences of Ukraine image/svg+xml

DOI:

https://doi.org/10.31548/energiya2019.04.005

Abstract

Abstract.  Squirrel-cage induction motors are the basis of the electric drive of working machines in industry and agriculture. Improving the energy efficiency of induction motors is an urgent task, one of the ways to solve which is to use an upgraded stator winding of an induction motor using internal capacitive reactive power compensation.

The aim of the study was to improve the three-phase single-layer stator winding with a full step, providing an improvement in the shape of the magnetic field curve in the air gap, increasing the efficiency and power factor of the machine.

For use, a three-phase bipolar single-layer template winding with a full pitch is proposed in which each stator phase winding is made in the form of two half-windings offset in space by a certain angle in the direction of rotation of the magnetic field. Electric capacitors are connected to the central points of the stator phase windings according to a certain scheme, which makes it possible to improve the shape of the magnetic field curve in the air gap, to increase the efficiency and power factor of the machine.

The magnetic field of an induction motor with the proposed stator winding has better characteristics than the base motor, which was chosen as a prototype. In particular, the curve of the magnetomotive force of the stator winding along the length of the air gap is closer to the sinusoid, and the value of the winding coefficients for the most significant 5th and 7th harmonics is reduced by 3.5-4 times compared to the prototype serial motor.

Key words: winding, induction motor, winding pitch, power factor, efficiency, reactive power, capacitance

References

Vaskovsky, U. M., Chuienko, R. M. (2012). Matematichne modeluvannya elektromagnitnogo polya kompensovanogo asinhronnogo dviguna [Mathematical modelling of the electromagnetic field of a compensated induction motor]. Electrotehnika ta electromehanika, 2, 26-30.

Gavriluk, R. B. (2012) Teoretichni osnovi simetrichnih dvosharovih shem obmotok elektrichnih mashin zminnogo strumu [Theoretical foundation two-layer charts of winding alternative current electrical machine]. Dissertation for the degree of Doctor of Engineering on speciality 05.09.01 – Electrical machines and apparatus. – National University «Lviv Polytechnic», Lviv, 2012.

Luschik, V. D. (2015) Perspektivns napryamki udoskonalennay elektrichnih mashin: monografiya [Perspective directions of improvement of electric machines: monography]. Kiyv: Komprint, 265 p.

Patent 133466 Ukraine Trifazna dvopolusna shablonna odosharova obmotka [Threephase bipolar pattern single-layer winding]. Zablodsky, M. M., Chuienko, R. M., the patent from 10.04.2019.

Chuinko, R. M. (2002) Energozberezhennya u pidgotovci kormiv do zgodovuvannya pri vikoristanni asinhronnih dviguniv iz vnutrishnou yemnisnou kompensacieu reaktivnoi potuzhnosti [Energysaving in food preparing by application induction motors with internal capacitance compensation of reactive power]. Dissertation for the degree of candidate of Engineering on speciality 05.09.16 – Application of electrical technologies in rural manufacture. – National Agrarian University. Kyiv, 2002.

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Published

2019-10-29

Issue

No. 4 (2019)

Section

Статті

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