| 简介 |
The present application provides an electric motor, a compressor and a refrigerating apparatus. The electric motor comprises : a stator assembly, with the stator assembly comprising a stator iron core, and the stator iron core being provided with stator slots; and a rotor assembly comprising a rotor iron core and a permanent magnet, with one of the stator iron core and the rotor iron core being arranged on the outer side of the other, and the permanent magnet being arranged on the rotor iron core. In the section perpendicular to the axis of the rotor iron core, the distance between the stator iron core and the rotor iron core is δ mm, the length of the permanent magnet in a magnetization direction of the permanent magnet is h mm, the number of stator slots is Q, the intrinsic coercive force of the permanent magnet is Hcj kA/m, where Hcj is smaller than or equal to 1800 kA/m, and the value of h satisfies 80 * (43-Q)/Hcj ≤ h ≤ 1.6 + δ. According to the electric motor provided in the present application, the use of heavy rare earth elements is reduced, the cost is reduced, and at the same time, the use requirements of the compressor can be met, and the cost performance of the electric motor is improved. |
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