Induction motor and manufacturing method thereof
AssigneeKabushiki Kaisha Toshiba
InventorTaizo TOMIOKA
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Abstract
An induction motor includes multiple conductor bars buried and disposed in a rotor core in a circumferential direction, and end rings joined with the multiple conductor bars so as to cause respective both ends thereof to be electrically conducted. Each conductor bar includes a first bar-shape metal portion, and two second metal portions joined with both ends thereof. The second metal portion is formed in a solid block shape. The first and second metal portions are joined with each other by friction stir welding or friction welding.
Claims13
An induction motor comprising a conductor cage, the conductor cage comprising a plurality of conductor bars buried and disposed in a rotor core in a circumferential direction, and end rings joined with the plurality of conductor bars so as to cause respective both ends thereof to be electrically conducted,
- wherein:
- each conductor bar comprises a first bar-shape metal portion, and two second metal portions joined with both ends of the first metal portion;
- and
- the second metal portion is formed in a block shape.
A manufacturing method of an induction motor, the method comprising:
- burring and disposing a plurality of conductor bars in a rotor core in a circumferential direction, each conductor bar comprising a first bar-shape metal portion, and a second metal portion joined with an end of the first metal portion and formed in a block shape;
- and
- assembling a conductor cage by joining end rings with the plurality of conductor bars so as to cause respective both ends thereof to be electrically conducted.
Dependencies are inferred from the claim text.