Patent ID: 6472780
Filing Date: 2002-10-29
Classification: H02K

Abstract:
A rotating electrical machine having a rotor free to rotate about a rotating shaft, a stator comprising a stator core formed by laminating a plurality of magnetic steel plates in a direction parallel with the rotating shaft of the rotor and coils wound on the stator core, and a case storing the stator, the rotating electrical machine comprising:a plurality of indentations formed on an inner peripheral face of the case; a plurality of protrusions formed on an outer peripheral face of the stator core, each protrusion projecting towards the case from the outer peripheral face of the stator core and being dovetailed to one of the indentations; and a cooling liquid passage defined by a section of the outer peripheral face of the stator core which is sandwiched by two adjacent protrusions, and the inner peripheral face of the case, the cooling liquid passage extending substantially parallel to the direction of the rotating shaft; wherein the stator core is cooled by passing a cooling liquid through the cooling liquid passage.