| 摘要 |
A permanent magnet motor, comprising a stator (1) and a rotor (4); the rotor comprises a rotor iron core (5) and permanent magnets (7a, 7b); in the radial direction of the rotor, each magnetic pole of the rotor iron core is provided with multiple layers of arc-shaped permanent magnet grooves (6a, 6b); a q-axis magnetic circuit is formed between two neighboring layers of permanent magnet grooves; the permanent magnets are disposed in the permanent magnet grooves; two neighboring magnetic poles of the rotor are respectively a first magnetic pole and a second magnetic pole having opposite polarity; the outer end of a permanent magnet in the first magnetic pole away from the q-axis is a first outer end; the outer end of the permanent magnet in the second magnetic pole away from the-q axis is a second outer end; the included angle A of the first outer end and the second outer end relative to the center of the rotor is less than an electrical angle of 80 degrees, the number of the stator grooves being N, the number of pairs of the rotor poles being P, the number of phases of the windings being m, and the number of grooves per pole per phase (N/2P/m) being an integer. Compared with existing structures, the permanent magnet motor dramatically reduces the torque pulsation of a motor. |
