Radial gap type rotating electrical machine, blower, compressor, and air conditioner

摘要

Provided is a radial gap type rotating electrical machine which inexpensively improves the demagnetization durability of a permanent magnet without reducing the torque characteristic and efficiency characteristic. An outer-rotor radial gap type rotating electrical machine (9) includes a field magneton (1) and an armature (2). The field magneton (1) has a permanent magnet (11) and a magnetic ring (12) as a back yoke for the permanent magnet (11). The magnetic ring (12) is located further away from the armature (2) than the permanent magnet (11), and includes a recessed portion (121) in the magnetic pole center (110). The magnetic pole center (110) is the center in the circumferential direction associated with the rotary shaft (3) of the magnetic pole. The thickness in the radial direction with the rotary shaft (3) as the center is locally reduced at the recessed portion (121).