Electric motor

An electric motor comprising:

• a shaft supported rotatably about a rotation axis;
• a rotor located radially outward from the shaft and rotatable integrally with the shaft;
• a stator radially opposing the rotor with a space therebetween, the stator having an external air passage and an internal air passage, the external air passage and the internal air passage being each a through hole open at both ends in a direction of extension of the rotation axis such that the external air passage and the internal air passage are arranged in a circumferential direction in the stator;
• a first bracket having an inlet hole that allows inflow of external air;
• a second bracket opposing the first bracket in the direction of extension of the rotation axis with the rotor and the stator being located between the second bracket and the first bracket;
• a heat exchanger comprising
• an internal air bypass located radially outward from the internal air passage,
• an external air bypass located radially outward from the internal air bypass, the external air bypass being continuous to an external space, and
• a heat transfer member to separate the internal air bypass and the external air bypass, and transfer heat from internal air flowing in the internal air bypass to the external air flowing in the external air bypass;
• a first guide disposed between the first bracket and the stator, the first guide being configured to guide the external air drawn in via the inlet hole to the external air passage, and to prevent the inflow external air from entering the internal air passage and the internal air bypass;
• and
• a second guide disposed between the second bracket and the stator, the second guide being configured to guide the external air after passing through the external air passage to the external space, guide the internal air to the internal air passage and the internal air bypass, and prevent the external air from entering the internal air passage and the internal air bypass.