Arrangement for cooling of an electrical machine

Arrangement for cooling of an electrical machine, comprising:

• an electrical machine with a rotor and a stator, an air-gap between the rotor and the stator, the stator including a plurality of stacked laminate-plates, wherein
• the laminate-plates include on a first side, which is facing the air-gap, a plurality of slots containing metal-windings of a stator-coil, and
• the laminate-plates are positioned and fixed by a structural support and by end-plates in relation to a central-part of the stator to achieve the air-gap;
• wherein the stator comprises a joint cavity formed by the end-plates, the central-part of the stator and an internal surface of the laminate-plates, the internal surface being defined by a second side of the laminate-plates which is opposite to the first side,
• wherein the joint cavity of the stator comprises a fan which
• circulates a gaseous medium from the cavity through openings of the end-plates to the air-gap, passing winding-heads of the stator-coil,
• circulates the gaseous medium from the air-gap through opening of the stacked laminate-plates back into the cavity, and
• wherein the joint cavity of the stator comprises a heat exchanger for cooling the gaseous medium, wherein the heat exchanger is located inside the joint cavity.