Electric motor

An electric motor comprising:

• a motor body including a rotor that is rotatable around an axis and a stator that is opposed to the rotor in a radial direction, the stator including a coil, the coil including a first coil end and a second coil end disposed opposite to the first coil end in an axial direction;
• a housing that houses the motor body;
• a stator cooling channel that is defined inside an inner surface of the housing and is configured to be filled with coolant, the stator cooling channel including a first coil end accommodation channel and a second coil end accommodation channel, the first coil end accommodation channel accommodating the first coil end, the second coil end accommodation channel accommodating the second coil end;
• and
• a housing cooling channel that is formed between the inner surface and an outer surface of the housing and is configured to be filled with coolant, the housing cooling channel including a main channel that is located outward from the motor body in the radial direction to surround the motor body,
• wherein
• the housing includes a housing protrusion that is positioned outward of the motor body in the radial direction and protrudes outward in the radial direction,
• the stator cooling channel includes a first end channel and a second end channel, the first end channel being formed in the housing protrusion and connecting to the first coil end accommodation channel, the second end channel being formed in the housing protrusion and connecting to the second coil end accommodation channel,
• the housing cooling channel includes a third end channel and a fourth end channel, the third end channel being formed in the housing protrusion and connecting to one end of the main channel of the housing cooling channel, the fourth end channel being formed in the housing protrusion and connecting to another end of the main channel,
• at least one of the first end channel, the second end channel, the third end channel, or the fourth end channel includes an axial channel extending in an axial direction and a tangential direction channel connecting to the axial channel and extending in a direction along a tangent line of a circle around the axis.