A 3Y/3Y Pole-Changing Winding of High-Power Asynchronous Motors

Authors: Gábor Kovács

Abstract:

Requirement for pole-changing motors emerged at the very early times of asynchronous motor design. Different solutions have been elaborated and some of them are generally used. An alternative is the so called 3 Y/3 Y pole-changing winding. This paper deals with high power application of this solution. A complete and comprehensive study is introduced, including features and design guidelines. The method presented in this paper is especially suitable for pole numbers being close to each other. The study also reveals that the method is more advantageous then the existing solutions for high power motors with 1:3 pole ratio. Using this motor, a new and complete drive supply system has been proposed as most appropriate arrangement of high power main naval propulsion drive. Further, the method makes possible to extend the pole ratio to 1:6, 1:9, 1:12, etc. At the end, the proposal is further extended to the here so far missing 1:4, 1:5, 1:7 etc. pole ratios. A complete proposal for the theoretically infinite range has been given in this way.

Keywords: Induction motor, pole changing 3Y/3Y, pole phase modulation, pole changing 1:3, 1:4, 1:5, 1:6.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1315503

References:

[1] W. Nürnberg, “The asynchronous machine” – Die Asynchronmaschine, Springer Verlag 1952. p.299.
[2] Liska József, “Electrical Machines IV. Asynchronous Machines” – Villamos gépek, IV. Aszinkron gépek, Tankönyvkiadó Budapest 1960. p. 126.
[3] Dawei Meng, Qian Wang: Research on Balanced Winding Used in 3Y/3Y pole changing Motor, - International Journal of Automation and Power Engineering (IJAPE) Volume 2 Issue 4, May 2013.
[4] Lengyel Zoltán, “Modern pole-changing motors with two independent windings”, “Korszerű kéttekercselésű motorok”, Ganz Közlemények 1964. p. 31 – 36.
[5] Stephen B. Kuznetsov, D.I.C., Ph.D., P.E., “Advanced Pole-Amplitude-Modulated Induction Machinery for Main Naval Propulsion” – publishing entity is unknown to the Author.
[6] Bedrich Heller, Václáv Hamata, “Harmonic Field Effects in Induction Machines”, ELSEVIER Scientific Publishing Company Amsterdam, Oxford, New York 1977.
[7] G. H. Rawcliff, B. V. Jayawant, “The development of a new 3: 1 pole-changing motor”. Proceedings of the IEE – Part A Power Engineering 1956. p. 306 – 316.
[8] Umesh B S, Kiran Kumar N, Sivakumar K, “Performance improvement of a nine phase pole phase modulated induction motor drive”. IEEE International Conference on Industrial Technology, 2015. p.812-817.