Rotating electrical machine
AssigneeNissan Motor Co., Ltd.
InventorsToshio Kikuchi, Shinichiro Kitada, Yutaro Kaneko
Life of this patent
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Abstract
A rotating electrical machine is proposed which effectively cools a stator and prevents the generation of an eddy current in the stator. A cooling liquid passage extends in a direction parallel with the rotating shaft of the rotor between an outer peripheral face of the stator cores and an inner peripheral face of the case storing the stator cores. The cooling liquid is passed through the cooling liquid passage. In this manner, a highly effective cooling results from direct contact of the cooling liquid and the stator cores. Furthermore an eddy current is not generated in the stator core as a result of using a cooling liquid having insulating properties.
Claims10
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.
A rotating electrical machine, comprising:
- a stator core comprised of:
- a plurality of plates, said plates being oriented substantially parallel to a rotating shaft of a rotor;
- and
- a plurality of protrusions protruding from an outer peripheral face of said stator core, each of said plurality of protrusions comprising a dovetailed protrusion section of adjacent plates;
- a case including a plurality of indentations formed on an inner peripheral face of said case, said case at least partially surrounding said stator core;
- and
- at least one cooling liquid passage formed between two protrusions, said case, and said stator core;
- wherein said stator core is substantially fixed to said case by engaging each of said plurality of protrusions with a respective indentation of said plurality of indentations.
Dependencies are inferred from the claim text.