| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an interior magnet type rotating electrical machine that suppresses cogging torque without reducing torque.SOLUTION: An interior permanent magnet type magnet rotor 20 has a cylindrical shape and has flat permanent magnets 40 embedded perpendicularly to a d axis, and a stator 100 is arranged on an outer circumference side of the interior permanent magnet type magnet rotor 20 and has circumferentially juxtaposed teeth 103 wound with coils 104 on an inner circumference side. The interior permanent magnet type magnet rotor has four first grooves 33-36 per pole symmetric with respect to the d axis on a peripheral side of the permanent magnet 40 in an outer circumferential surface, and has two second grooves 37, 38 per pole symmetric with respect to the d axis in regions beyond the peripheral side of the permanent magnet 40.θ1≥θ2 is satisfied, whereθ1 is an angle formed by two center grooves 33, 34 nearer to the middle of the four first grooves 33-36 andθ2 is an angle formed by the outer grooves 35, 36 and the adjacent center grooves 33, 34 of the four first grooves 33-36.</p> |
