In a drive device, a housing includes a motor accommodation portion for accommodating a motor and an inverter accommodation portion for accommodating an inverter unit, the motor accommodation portion includes a tubular portion of a tubular shape extending in a first direction, the inverter accommodation portion includes a peripheral wall portion surrounding the inverter accommodation portion when viewed from a second direction and a plate portion extending from the tubular portion along one side in a direction perpendicular to the first direction and intersecting the second direction and continuous with the peripheral wall portion, and at least one of the pump and the oil cooler is fixed to the plate portion.

An electric machine (01), including a rotor (06), a stator (03), an electric winding (04) and a housing (02). The electric machine has an overall thermal resistance in relation to the surroundings which is dimensioned such that the continuous heat losses resulting from a continuous operating current being fed to the electric winding (04) is carried off to the surroundings so that at a predetermined ambient temperature a predetermined maximum winding temperature is not exceeded. The electric machine is characterized in that the housing (02) is filled with a dielectric liquid (11). The liquid has a heat capacity which is dimensioned such that it can absorb a peak load heat quantity which is given off by the electric winding (04), in excess to the continuous heat losses, when said winding is operated at a peak current during a peak load operating time.

An electric drive system comprising an electric machine, a transmission connected to the electric machine, and an inverter. The electric drive system further comprising an at least two-part housing. The electric drive system having two mutually separate cooling circuits for the inverter and the electric machine, wherein the two cooling circuits are thermally connected via a heat exchanger that is installed, between the inverter and the electric machine, in the housing.

An electric drive system comprising an electric machine, a transmission connected to the electric machine, and an inverter. The electric drive system further comprising an at least two-part housing. The electric drive system having two mutually separate cooling circuits for the inverter and the electric machine, wherein the two cooling circuits are thermally connected via a heat exchanger that is installed, between the inverter and the electric machine, in the housing.

A canned motor device includes a motor unit and a sensor. The motor unit includes a rotor, a stator, and first and second casing bodies. The first casing body includes a first surrounding wall and a first side wall cooperating with the first surrounding wall to define an accommodating space for accommodating the rotor therein. The second casing body includes a second surrounding wall surrounding the first surrounding wall and a second side wall corresponding in position to the first side wall. The stator surrounds the second surrounding wall. The sensor is mounted to the second casing body and detects a leakage according to a change in electrostatic capacity between the first and second side walls.

A canned motor device includes a motor unit and a sensor. The motor unit includes a rotor, a stator, and first and second casing bodies. The first casing body includes a first surrounding wall and a first side wall cooperating with the first surrounding wall to define an accommodating space for accommodating the rotor therein. The second casing body includes a second surrounding wall surrounding the first surrounding wall and a second side wall corresponding in position to the first side wall. The stator surrounds the second surrounding wall. The sensor is mounted to the second casing body and detects a leakage according to a change in electrostatic capacity between the first and second side walls.

A hub for a rotor of a permanent magnet motor comprises fluid conduits which extend radially outwardly to a region radially beneath each magnet of the motor and then radially inwardly. A rotor of a permanent magnet motor is also provided which includes a hub body having a plurality of lugs on an outer circumferential surface of the hub body, each lug substantially consisting of a tapered base portion and a head portion. The maximum width of the base portion of each lug in the circumferential direction substantially corresponds to the circumferential distance between the adjacent permanent magnets. Furthermore, a rotor of a permanent magnet motor comprises rotor segments having axially extending grooves defined in a radially extending sidewall of each rotor segment.

A stator for an electrical machine, in particular for an electromotive drive machine for an electric or hybrid vehicle, includes a stator core stack with a stator yoke and a number of radial stator teeth, as well as a corresponding number of stator slots, arranged between the stator teeth, for receiving a stator winding. A cooling apparatus has a number of cooling channels, each of which runs axially in one of the stator slots.

A motor stator assembly includes stator yoke, coil sets connected to the stator yoke, and a positioning plate removably connected to the stator yoke. Each coil set has a coil member with two terminal legs. The positioning plate has though openings. The terminal legs of each coil set extend through one of the through openings. The electrical conductor set has conductor layers and an insulating part encapsulating the conductor layers. Each conductor layer has conductor components each having connection holes exposed from the insulating part. One of the terminal legs of each coil set extends through one of the connection holes of one of the conductor components of one of the conductor layers.

In an electrical machine for the hybrid drive of a vehicle, an annular cooling jacket extends between a housing and a casing. The cooling jacket is connected to a coolant inlet and a coolant outlet so that coolant is axially introduced into the cooling jacket. The coolant inlet and the coolant outlet are situated next to each other in the circumferential direction of the housing and are hydraulically connected to a deflection section by way of coolant ducts. Coolant introduced into the cooling jacket flows in two partial flows in opposite directions, to the deflection section through coolant ducts forming an intake. The coolant is deflected back to the coolant outlet through a coolant duct forming a return. The coolant flows through the coolant duct of the return and the axially adjacent coolant duct of the intake in opposite directions.