Brushless motor and electric power steering device having brushless motor

摘要

In a three-phase brushless motor, a rotor has a stacked structure including first to third stages which include segment magnets to which a skewprocess is applied. When the number of poles P in the circumferential direction is set to P, an angle of skew is set to ” = 360/ (6P/2) [deg] . That is, the magnet segments are respectively arranged so that the magnet segment of the second stage is shifted by a rotating angle of ” /3 in the circumferential direction from the magnet segment of the first stage and the magnet segment of the third stage is shifted by a rotating angle of 2” /3 in the circumferential direction.