Patent attributes
The invention relates to an electric machine (6) comprising a rotor and a stator, the rotor having a shaft (7) and the longitudinal extension of the electric machine (6) being defined by the shaft axis. The electric machine (6) can be cooled by means of a cooling circuit, the latter comprising at least one cooling pipe (3), which extends essentially in the longitudinal direction of the electric machine (6). The cooling circuit comprises a first circular distribution pipe (1) that forms almost a complete circle, which stretches over one plane, the axis of the longitudinal extension of the electric machine (6) being essentially perpendicular to said plane. According to the invention: at least one cooling pipe (3) can be connected in a water-tight manner to the first distribution pipe (1); the cooling circuit can be traversed by a coolant and has a first connection (10), which allows coolant to be supplied to the cooling circuit; and the cooling circuit has a second connection (9), which allows coolant to be evacuated from the cooling circuit. The first distribution pipe (1) is cast in one piece (2) from metal and said piece (2) has openings (4) for the cooling pipes (3) at the connection points of the first distribution pipe (1) to the cooling pipes (3). Once installed, the piece (2) is connected to the housing of the electric machine (6) so that it can conduct heat and/or forms an integral part of the housing.
