Rotating Electrical Machine

Abstract: According to one embodiment, an external fan (22) of a rotating electrical machine 10 includes a base (101) 5 and a plurality of blades (102), and rotates integrally with a shaft (14) to generate airflow in a direction (Da2) opposite to a first direction (Da1) regardless of a rotation direction of the shaft (14). The base (101) has an outer peripheral surface (101a) that has an 10 annular shape around a rotation center axis (Ax) and has a diameter decreasing toward the first direction (Da1), and the base (101) is coupled to the shaft (14). The blades (102) each protrude from the outer peripheral surface (101a) of the base (101), are arranged at 15 intervals in the circumferential direction of the rotation center axis (Ax), and are connected to each other only by the base (101).

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