Modular built-in alternating pole permanent magnet motor rotor

Abstract

The invention discloses a modular built-in alternating pole permanent magnet motor rotor, which comprises a rotor iron core, a permanent magnet and a rotating shaft; the rotor iron core is sleeved on the outer periphery of the rotating shaft and is made of magnetically permeable materials; the rotor iron core includes a rotor iron core main body and a rotating shaft. P split cores, where P is the number of pole pairs of the motor; P rotor core slots are uniformly distributed along the outer circumference of the rotor core body, and each rotor core slot has at least three installation planes, and the three installation planes are perpendicular to the center of the rotor. The angle between the planes where the lines lie is θ 1 , θ 2 and θ 3 ; then 40 <θ 1≤90，10 <θ 2<50，10 <θ3<50; a permanent magnet is nested on each installation plane; the shape of the split iron core is the same as that of the rotor core slot, and the split iron core is spliced ​​and placed in the rotor core slot, and each permanent magnet and the corresponding installation of the split iron core flat contact. The invention can reduce the processing technology while reducing magnetic flux leakage and improving the utilization rate of the permanent magnet.< / θ < / θ < / θ

Description

technical field [0001] The invention relates to the field of motor manufacturing, in particular to a modular built-in alternating pole permanent magnet motor rotor. Background technique [0002] In recent years, due to the advantages of high torque density, high power density and high efficiency, permanent magnet motors have been widely used in home appliances, electric vehicles, wind power generation, aerospace and other occasions. High-performance permanent magnet motors must use rare earth permanent magnet materials such as NdFeB or SmCo. Although my country has a large amount of rare earth storage, rare earth is a non-renewable energy source; coupled with the development of the global new energy industry, it will inevitably promote a further increase in the price of rare earth. Therefore, many experts and scholars have devoted themselves to improving the utilization rate of permanent magnet materials, a realistic topic. [0003] In the traditional interior permanent ma...

AI Technical Summary

Problems solved by technology

This part of the magnetic flux is called the leakage flux, and the larger leakage flux reduces the utilization rate of the permanent magnet (the output torque generated by the amount of permanent magnet per unit volume)

Moreover, the permanent magnets are placed inside the rotor core, which inevitably increases the complexity of rotor core processing and assembly

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