A permanent magnet type rotating electrical machine that is capable of
producing a higher output and is suitable for high-speed rotation. A pair
of nonmagnetic portions are formed in a rotor core at opposite ends of
each pole. The waveform of induced voltage and a motor voltage are
adjusted based on two parameters, i.e., an angle covering minimum
magnetic path portions formed by the nonmagnetic portions and a magnet
width. Assuming that a circumferential pitch of teeth cores with respect
to a rotor axis is .tau.s (degree) and an opening angle contained by a
circumferential width between radial width minimum points of the pair of
magnetic path portions with respect to the rotor axis is .theta.
(degree), .theta..apprxeq.(n+Y).times..tau.s (n: integer larger than 0)
is met. Y=0.5 is set when the stator windings are wound in a distributed
winding way, and Y=0.9-1.2 is set when they are wound in a concentrated
winding way. The magnet forming one pole is divided into two parts, and a
bridge portion is formed between the two divided magnet parts.