in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator

Full Title

Arrangements for cooling or ventilating (channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24) > for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil > in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator