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Electric machine with modular stator coils and cooling tubes

  • US 9,712,011 B2
  • Filed: 10/17/2011
  • Issued: 07/18/2017
  • Est. Priority Date: 10/18/2010
  • Status: Active Grant
First Claim
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1. A stator for an electrical machine, the stator comprising:

  • a stator core comprising a plurality of stator teeth and stator slots, anda stator winding comprising a plurality of stator coils,wherein width of each stator coil is one stator slot pitch, and the stator teeth are shaped to allow each stator coil to be installed by pushing the stator coil to surround one of the stator teeth without changing the shape of the stator coil, andwherein the stator coils comprise cooling tubes made of different material than electrical conductors of the stator coils and attached to the electrical conductors of the stator coils, the cooling tubes forming tubular cooling channels for conducting cooling liquid in the stator slots in the longitudinal direction of the electrical conductors of the stator coils and among the electrical conductors of each of the stator coils, andwherein each electrical conductor comprises electrically conductive material which constitutes, together with one and only one of the cooling tubes, at least a part of a cable with a cooling channel so that a cross-section of the cooling tube is in a center of a cross-section of the cable.

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