Cooling arrangements for rotating electrical machines

摘要: A rotating electrical machine has openings (105) in its stator teeth (101) occupying a substantial part of the surface area each tooth so that windings (103) have only short thermal path to axial cooling ducts created by openings. In another embodiment, rotor (109) is provided with recess (110) at one corner form duct; may be such depth as expose an adjacent slot (118) duct. Cooling air, either single-ended or double-ended ventilation system.