Permanent magnet motor and washing machine with same

Abstract

The invention discloses a permanent magnet motor and a washing machine with the same. The permanent magnet motor comprises a stator assembly and a motor end cover, wherein the stator assembly comprises a stator and a stator injection molding part, the stator comprises a stator core and a stator winding, the stator winding is wound on the stator core, the stator injection molding part coats the stator winding, the motor end cover comprises a front end cover and a rear end cover, the front end cover and the rear end cover are respectively arranged at two axial ends of the stator assembly, at least one end of the stator assembly is matched with a corresponding motor end cover in a seam allowance manner, at least one end of the stator assembly is provided with one of a first limiting bulge anda first limiting groove, the motor end cover corresponding to the at least one end of the stator assembly is provided with the other one of the first limiting bulge and the first limiting groove, andthe first limiting bulge is matched with the first limiting groove so as to limit the rotation of the stator assembly around the central axis of the stator assembly relative to the corresponding motor end cover. The permanent magnet motor provided by the invention has good sound quality and is convenient to assemble.

Description

Technical field [0001] The invention relates to the technical field of household appliances, in particular to a permanent magnet motor and a washing machine having the same. Background technique [0002] In the related art, permanent magnet motors have the following problems: (1) The multiple rotor poles of the rotor core are connected by a magnetic bridge, and the stator core is used to form an electromagnetic design. Due to the magnetic bridge leakage loss between the rotor poles , Resulting in lower performance indicators such as the overall efficiency of the permanent magnet motor; (2) the assembly of the permanent magnet motor is more complicated; (3) the stator assembly is prone to low-frequency vibration, which makes the permanent magnet motor have greater noise; (4) most The electric control board of the permanent magnet motor is installed with a plastic cover or a metal shell, and then screwed to the rear cover. At the same time, the diverging device of the electric cont...

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Problems solved by technology

[0002] In the related art, there are the following problems in the permanent magnet motor: (1) a plurality of rotor poles of the rotor core are connected by a magnetic bridge, and the electromagnetic design is formed in conjunction with the stator core, because the magnetic bridge leakage loss between the rotor poles , resulting in low performance indicators such as the efficiency of the permanent magnet motor; (2) the assembly of the permanent magnet motor is relatively cumbersome; (3) the stator assembly is prone to low-frequency vibration, which makes the permanent magnet motor have a large noise; (4) most The electric control board of the permanent magnet motor is installed with a plastic cover or a metal shell, and then locked to the rear end cover with screws. At the same time, the divergent device of the electric control board needs to be combined with a separate heat sink for heat dissipation treatment to ensure the normal operation of the motor , this setup results in complex assembly and high cost

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