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Electric motor with field assemblies having core pieces with mating features
 
   
Document Number
US Patent 7233091
Issued Date
June 19, 2007
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Abstract
An electric motor has a field assembly, such as a stator, has field coils that are wound to a net shape. Lead wires are brought out from the ends of each field coil. The field coils are insulated. The field coils are assembled with stator core pieces, such as pole pieces and return path pieces, into the stator. The stator core pieces are formed prior to being assembled with the field coils. In an aspect of the invention, the pole pieces and return path pieces are separately formed and then assembled together with the field coils, which have also been separately formed. The pole pieces and return path pieces are formed with mating features that are mated to hold the pole pieces and return path pieces together.
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Number of Claims:
9
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Owner
Black & Decker Inc. (Newark, DE)
Published
June 19, 2007
Application Number
10/934,104
Filed
September 3, 2004
US Classification
310/216   310/217 310/218
Int'l Classification
H02K   1/18   (20060101)   H02K   1/22   (20060101)  
Examiner
USPTO Field of Search
310/216   310/217   310/218   310/254  
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