Abstract: A motor stator (11) for a compressor, a permanent magnet motor (10), and a compressor (A) are disclosed. The stator (11) includes: a stator core (111); a stator winding (112), the stator winding (112) including a plurality of coil groups, and each coil group having at least two connectors (1124); a lead-out wire (113) used to connect an external circuit and the stator winding (112), there being a plurality of lead-out wires (113) and each lead-out wire (113) being connected to connectors of at least two different coil groups, wherein the rated voltage between terminals on which a motor is mounted is Un, the maximum outer diameter of the stator core (111) is Dmax, and the axial length of the stator core (111) is L, Un/(Dmax2×L)?0.3 V/cm3.

Abstract: Disclosed are a permanent magnet motor, a compressor and a refrigeration system. In the permanent magnet motor, the diameter D of a contour circle of the smallest inner periphery of a stator, the diameter d of a contour circle of the largest outer periphery of a rotor, the fundamental wave amplitude Bm1 of an air-gap flux density at an average gap between the stator and the rotor, the axial length L of the rotor, the total number of serially connected turns Ns of each phase winding, and a bus DC voltage Udc of a frequency converter supplying power to the permanent magnet motor before inversion are set as: 0.003 Udc?(D+d)×L×Bm1×Ns?0.008 Udc.

Abstract: Disclosed are a permanent magnet motor, a compressor and a refrigeration system. In the permanent magnet motor, the diameter D of a contour circle of the smallest inner periphery of a stator, the diameter d of a contour circle of the largest outer periphery of a rotor, the fundamental wave amplitude Bm1 of an air-gap flux density at an average gap between the stator and the rotor, the axial length L of the rotor, the total number of serially connected turns Ns of each phase winding, and a bus DC voltage Udc of a frequency converter supplying power to the permanent magnet motor before inversion are set as: 0.003 Udc?(D+d)×L×Bm1×Ns?0.008 Udc.

Abstract: A motor stator (11) for a compressor, a permanent magnet motor (10), and a compressor (A) are disclosed. The stator (11) includes: a stator core (111); a stator winding (112), the stator winding (112) including a plurality of coil groups, and each coil group having at least two connectors (1124); a lead-out wire (113) used to connect an external circuit and the stator winding (112), there being a plurality of lead-out wires (113) and each lead-out wire (113) being connected to connectors of at least two different coil groups, wherein the rated voltage between terminals on which a motor is mounted is Un, the maximum outer diameter of the stator core (111) is Dmax, and the axial length of the stator core (111) is L, Un/(Dmax2×L)?0.3 V/cm3.

Abstract: The present disclosure relates to a variable-capacity compressor (100) and a refrigeration device (200).

Abstract: The present disclosure relates to a variable-capacity compressor (100) and a refrigeration device (200).

Abstract: A crankshaft for a rotary compressor includes: a body (1) and an eccentric portion (2), the eccentric portion (2) being fitted over the body (1), wherein at least one of a flexible structure (21) and an oil pressure surface (22) is arranged on the eccentric portion (2). The flexible structure (21) is configured to deform inwards when subject to an external force in an inward direction. The oil pressure surface (22) is configured in such a way that in a direction opposite to a rotating direction of a rotating central axis of a crankshaft (300), a distance between a front end (221) of the oil pressure surface (22) and the central axis of the eccentric portion (2) is smaller than a distance between a tail end (222) of the oil pressure surface (22) and the central axis of the eccentric portion (2). Also disclosed are a rotary compressor and a refrigerating cycle device.