Rotating electrical machine

A rotating electrical machine comprising:

• a stator;
• and a rotor disposed inside of the stator, wherein
• the rotor includes:
• a rotor core having a plurality of insertion holes;
• and
• a plurality of permanent magnets respectively inserted into the plurality of insertion holes, the permanent magnets forming a magnetic pole,
• each of the permanent magnets has an arc shape that is convex toward an inner peripheral side of the rotor core, and has:
• a first arc surface located on an outer peripheral side of the rotor core;
• and a second arc surface located on the inner peripheral side of the rotor core,
• the permanent magnets form two or more layers that are arranged in a radially inward direction of the rotor core,
• the number of permanent magnets per layer increases by one in the radially inward direction of the rotor core,
• the permanent magnets have the same shape, and
• a distance between the layers adjacent to each other is smaller on the outer peripheral side of the rotor core than at a position distant from an outer periphery of the rotor core along a circumferential width direction of each permanent magnet.