Permanent magnet motor and its compressor and air conditioner

Abstract

The present invention discloses a permanent magnet motor, a compressor comprising the same and an air conditioner comprising the same. The permanent magnet motor comprises a stator and a rotor; the stator includes an annular stator yoke portion and a plurality of stator teeth arranged at the inner wall of the stator yoke portion in the circumference direction at regular intervals, a stator groove is limited between two adjacent stator teeth, and a hollow bore is commonly limited by a plurality of stator teeth; and the rotor is arranged in the hollow bore and is provided with a plurality of installation grooves, and each installation groove is provided with a permanent magnet, wherein the min gap between the stator and the rotor is gmin, the width of the tooth of each stator tooth is Bt, the diameter of the hollow bore is D, and the relations of the gmin, the Bt and the D are described as follows: 12<=Bt / gmin<= 14, and 68<=D / gmin<=79. The permanent magnet motor is able to regulate the balance of the copper loss and the iron loss, improve the efficiency of the permanent magnet motor, reduce the usage amount of the permanent magnet and reduce the cost of the permanent magnet motor when the relations are satisfied, wherein the relations are described as follows: 12<=Bt / gmin<= 14, and 68<=D / gmin<=79.

Description

technical field [0001] The invention relates to the technical field of motor manufacturing, in particular to a permanent magnet motor and a compressor and an air conditioner having the same. Background technique [0002] In related technologies, for permanent magnet synchronous motors used in home appliances such as air-conditioning compressors, the outer diameter of the motor is limited by the inner diameter of the air-conditioning compressor housing. Under the condition of limiting the outer diameter of the motor, improving the efficiency of the motor is mainly to adjust the line load of the motor. And the balance of magnetic load, that is, the balance of copper loss and iron loss. Under the premise that the thickness of the stator yoke is constant, the stator tooth width and the diameter of the inner circumference of the stator affect the size of the slot area of ​​the motor, that is, the line load of the motor, thereby affecting the copper loss of the motor, and the size...

AI Technical Summary

Problems solved by technology

Under the premise that the thickness of the stator yoke is constant, the stator tooth width and the diameter of the inner circumference of the stator affect the size of the slot area of ​​the motor, that is, the line load of the motor, thereby affecting the copper loss of the motor, and the size of the stator tooth width affects the magnetic load of the motor , thus affecting the motor iron loss

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