Permanent magnet type rotating electrical machine and electric power steering device

摘要: It is possible to provide a permanent magnet type rotating electrical machine which can reduce cogging torque component caused by irregularities of the rotor side. The includes: having polygonal core and plurality magnets; stator fixed an armature winding. When M number poles, N slots, magnets are arranged in circumferential direction from first M-th magnet, hi positional shift amount i-th (i = 1, 2, ..., M) reference positions at identical distance rotation center radial interval direction, total unit vectors angle 2πN(i-1)/M(rad) defined. each multiplied hi, smaller than maximum value absolute hi.