Abstract: An electric machine includes a housing having cylindrical outer walls including a stator portion and a cooling system portion adjacent to the stator portion. The electric machine includes a rotor drive shaft protruding coaxially with the cylindrical outer walls of the electric machine from the front of the electric machine, and a rotor coupled to the rotor drive shaft and arranged coaxially within the stator portion of the cylindrical outer walls of the machine housing. At least one air inlet is formed in the cylindrical outer walls of the machine housing between the stator portion and the cooling system portion. At least one air guide vane extends from the air inlet into a hollow volume of the rotor forming a cooling air duct from the air inlet past the inner surface of the rotor and back to the inner surface of the cooling system portion.

Abstract: A cooling system cools at least one heat producing device provided in a unit of transport, and a method is provided for cooling at least one heat producing device provided in a unit of transport. The cooling system includes at least one first liquid circuit and at least one first heat exchanger assigned to the first liquid circuit, the first liquid circuit, for cooling the at least one first heat producing device, being configured to absorb heat of the first heat producing device via a cooling liquid circulating in the first liquid circuit and dissipate heat to the first heat exchanger, the first heat exchanger being coupled in such a manner to a first air-guiding system available on board the unit of transport, that exhaust air extracted from the first air-guiding system can be supplied to the first heat exchanger in order to recool the cooling liquid.

Abstract: A cooling system cools at least one heat producing device provided in a unit of transport, and a method is provided for cooling at least one heat producing device provided in a unit of transport. The cooling system includes at least one first liquid circuit and at least one first heat exchanger assigned to the first liquid circuit, the first liquid circuit, for cooling the at least one first heat producing device, being configured to absorb heat of the first heat producing device via a cooling liquid circulating in the first liquid circuit and dissipate heat to the first heat exchanger, the first heat exchanger being coupled in such a manner to a first air-guiding system available on board the unit of transport, that exhaust air extracted from the first air-guiding system can be supplied to the first heat exchanger in order to recool the cooling liquid.