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Squirrel-cage induction motor
 
   
Document Number
US Patent 5903081
Issued Date
May 11, 1999
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Abstract
The present invention relates to a squirrel-cage induction motor for frequency converter use, in particular, which squirrel-cage induction motor comprises a stator, a stator winding arranged in its axial grooves, divided into at least two coil groups for each phase of the supplying alternating current and connected to the supplying alternating current in such a manner that the sum of basic frequency groove currents is substantially zero at each moment. In accordance with the invention, one half of the coil groups of each phase is connected to the supplying alternating current at one end of the stator and the other half of the coil groups of each phase at the other end of the stator.
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Number of Claims:
4
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Owner
ABB Motors Oy (Vaasa,FI)
Published
May 11, 1999
Application Number
08/994,944
Filed
December 19, 1997
US Classification
310/168   310/125 310/160
Int'l Classification
H02K   3/28   (20060101)  
Examiner
Assistant Examiner
Priority Data
Dec 31, 1996 [FI] 965302
USPTO Field of Search
310/168   310/160   310/125  
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