Centrifugal fan and rotating electric machine

When an existing centrifugal fan acts in a wide rotation area from a low-speed rotation area to a high-speed rotation area, if the cooling flow of the low-speed rotation area needs to be ensured, the flow of the high-speed rotation area can be changed to be higher than the flow required by cooling, so that wind sound is increased, and strong discomfort is brought. Especially, the requirements for maintaining the cooling flow of a low-speed rotating area and reducing the noise of a high-speed rotating area are very strong, but the noise value of the high-speed rotating area is difficult to reduce so far. A centrifugal fan (1) is provided with a main plate (2) having a center of rotation (O), and a plurality of blades (4) extending from the main plate (2) in the direction of a rotation axis passing through the center of rotation, the longitudinal direction of the blades (4) extends from the inner peripheral side to the outer peripheral side of the main plate (2), and when the distance from the front edge (A) of