COOLED PRIMARY OR SECONDARY PART OF AN ELECTRIC MOTOR

摘要

The invention relates to a primary part (1) or a secondary part (31) of an electric motor (2), comprising a core (3) consisting of a magnetically conductive material forming grooves (4) for the windings (5). A cooling fluid (7) flows through at least one cooling tube (6) which is provided in the grooves (4) and beneath the coils (5). In order to ensure that one such primary part (1) or secondary part (31) is comparatively easy to produce and to assemble, and has increased cooling power or an increased degree of cooling action in relation to prior art, the effective cross-section of the groove comprises an at least local holding contraction (10, 11) in terms of the cooling tube (6) in such a way that said cooling tube is fixed in its seat in a receiving region (12) of the groove (4) by means of said holding contraction (10, 11). Furthermore, the groove cross-section in the receiving area (12) comprises a contour (13) corresponding with the outer contour (14) of the cooling tube (6) in such a way that the cooling tube (6) has an at least local surface contact (18) with the inner wall (19) of the receiving area (12) in relation to its outer circumference (17), extending essentially along said cooling tube.