Patent ID: 11967879
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. An electric motor comprising:
a shaft that is rotatably supported for rotation around a rotation axis;
a rotor that is disposed outwardly of the shaft in a radial direction and rotates integrally with the shaft;
a stator that faces the rotor with a spacing therebetween in the radial direction;
a tubular frame that encompasses the rotor and the stator;
a first bracket that includes (i) an inflow path through which air of an outside flows into an inside and (ii) an outflow path through which the air having flowed through the inflow path into the inside flows out to the outside; and
a second bracket that, with the first bracket, sandwiches the rotor and the stator in a direction of the rotation axis, wherein
the first bracket and the second bracket are fixed to the frame at positions sandwiching the frame in the direction of the rotation axis,
the frame includes (i) a first ventilation path that communicates with the inflow path and (ii) a second ventilation path that communicates with the outflow path and is positioned spaced from the first ventilation path in a circumferential direction with respect to the rotation axis,
the second bracket includes a third ventilation path that forms a flow path from the first ventilation path to the second ventilation path positioned opposite to the first ventilation path with respect to a plane containing the rotation axis, and
the air having flowed through the inflow path into the inside passes, in order, through the first ventilation path, the third ventilation path, and the second ventilation path, and flows out to the outside through the outflow path.