Rotor, motor, compressor, air conditioner and vehicle

Abstract

The invention provides a rotor, a motor, a compressor, an air conditioner and a vehicle. The rotor comprises: a rotor iron core, wherein the rotor iron core is provided with a plurality of magnet grooves; permanent magnets arranged in the magnet grooves; and a first through hole formed in the rotor core, wherein the first through hole is close to one side of the outer contour line of the rotor core, and the first through hole is located between the outer contour line of the rotor core and the magnet grooves, the ratio of the minimum distance L1 from the first through hole to the magnet groovesto the thickness hm of the permanent magnets is larger than or equal to 1 and smaller than or equal to 3. According to the rotor provided by the invention, the use amount of the permanent magnets canbe increased to the maximum extent, the purpose of improving the magnetic load is achieved, the number of the magnets is increased, the built-in depths of the magnets are increased, and the copper loss and the magnet eddy current loss are reduced, so that the motor efficiency is improved, the q-axis inductance is reduced, and the requirements of high-rotating-speed operation and low-noise can bemet.

Description

technical field [0001] The present invention relates to the technical field of motors, in particular to a rotor, a motor, a compressor, an air conditioner and a vehicle. Background technique [0002] In related technologies, the rotor magnet of variable frequency permanent magnet synchronous motor generally adopts a "V" shape, resulting in a large q-axis inductance Lq. When the motor is running at high speed, because the power supply voltage is the set value, it cannot be further increased, resulting in the motor running at a high speed. Under the condition of high torque, it enters the field weakening in advance, and the operation under the condition of high torque load under the maximum operating speed is limited, and after the motor enters the field weakening operation, the noise of the motor becomes worse. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art. [0004] To ...

AI Technical Summary

Problems solved by technology

[0002] In related technologies, the rotor magnet of variable frequency permanent magnet synchronous motor generally adopts a "V" shape, resulting in a large q-axis inductance Lq. When the motor is running at high speed, because the power supply voltage is the set value, it cannot be further increased, resulting in the motor running at a high speed. Under the condition of high torque, it enters the field weakening in advance, and the operation under the condition of high torque load under the maximum operating speed is limited, and after the motor enters the field weakening operation, the motor noise becomes worse

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