Electric motor

An electric motor arrangement comprising:

• an electric motor having a casing;
• power electronics;
• a pump, the pump having a pump chamber with a suction-side connection and with a pressure-side connection;
• a liquid cooling device configured to provide cooling to the power electronics and to the electric motor, wherein
• the liquid cooling device is connected to the pump chamber,
• the liquid cooling device effects the cooling with a fluid delivered by the pump,
• a coolant channel is routed around the electric motor,
• the coolant channel is arranged externally on the casing of the electric motor and between the electric motor and the power electronics,
• the fluid runs from the pressure-side connection through the coolant channel to the suction-side connection,
• connections for fluid lines are provided on the casing,
• the coolant channel has the two connections, a supply line and a return line,
• the supply line is connected to the pressure-side connection,
• the return line is connected to the suction-side connection,
• the cooling channel is spiral-shaped,
• heat pipes are provided on components of the power electronics and the electric motor, the heat pipes being separated from the coolant channel,
• the heat pipes are connected to the coolant channel to effect a cooling effect;
• and
• a control element configured to control a flow rate is provided in the supply line and in the coolant channel.