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Reduced vibration motor winding arrangement

United States Patent

5,686,774
November 11, 1997
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
An individual phase winding arrangement having a sixty electrical degree phase belt width for use with a three phase motor armature includes a delta connected phase winding portion and a wye connected phase winding portion. Both the delta and wye connected phase winding portions have a thirty electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of individual coils each formed, in turn, from an unequal number of electrical conductor turns in the approximate ratio of .sqroot.3. The individual coils of the delta and wye connected phase winding portions may either be connected in series or parallel. This arrangement provides an armature winding for a three phase motor which retains the benefits of the widely known and utilized thirty degree phase belt concept, including improved mmf waveform and fundamental distribution factor, with consequent reduced vibrations and improved efficiency.
Slavik; Charles J. (Rexford, NY), Rhudy; Ralph G. (Scotia, NY), Bushman; Ralph E. (Lathem, NY)
The United States of America as represented by the Department of Energy (Washington, DC)
08/ 367,615
January 3, 1995
RIGHTS OF THE GOVERNMENT The United States Government has rights in this invention pursuant to Contract No. DE-AC12-76SN00052 awarded by the United States Department of Energy.