Electrical Machine Having a Cooling Jacket

An electrical machine, comprising:

• a stator;
• a cooling jacket which extends over at least part of the stator and has a coolant inlet and a coolant outlet which are located substantially on an axial plane of the electrical machine, said cooling jacket having a motor jacket in surrounding relationship to the stator and an outer jacket having at least one section in spaced-apart relationship to the motor jacket;
• a hollow helix having a predeterminable pitch and arranged in an area of the section between the motor jacket and the outer jacket;
• and
• a guiding apparatus located at an end of the helix for deflecting a coolant flow in the helix back into an interspace between turns of the helix to the outlet of the cooling jacket.

An electrical machine, comprising:

• a stator;
• a cooling jacket which extends over at least part of the stator;
• a hollow helix having a predefined pitch and accommodated in the cooling jacket, said helix having a coolant inlet and a coolant outlet;
• and
• a baffle placed in proximity of the coolant outlet for deflecting coolant exiting the helix to flow into an interspace between turns of the helix in opposite direction to a coolant flow in the helix for discharge through an outlet of the cooling jacket.