Rotor for permanent magnet motor

Abstract

The invention provides a rotor for a permanent magnet motor. The rotor for the permanent magnet motor comprises a rotating shaft, a core, a magnetic shield and a permanent magnet, wherein the rotor is integral; the rotating shaft is covered by the magnetic shield; the magnetic shield is covered by the core; the rotating shaft, the magnetic shield and the core share the same axial center; and the permanent magnet is covered by the core. The permanent magnet motor not only has the advantages of the normal motor but also is simple in structure, and has higher use ratio of a magnetic material. The core is easy to magnetize after being processed by low-carbon steel so that a magnetic flow in each grade is uniform. By designing the rotor in an integral structure and sealing the permanent magnet inside the rotor, the occurrence of breaking the permanent magnet is reduced even if no permanent magnets are broken. The rotating shaft is coated by a magnetic insulation material so that no magnetism leakage is mainly generated. In the same condition, 30-40% of magnetic steel can be saved, thereby greatly saving the cost.

Description

technical field [0001] The invention relates to the field of motors, in particular to a rotor of a permanent magnet motor. Background technique [0002] The motor rotor is an essential part of the motor. At present, the internal structure of the permanent magnet motor produced, sold and used in the market is complicated, and the magnetic material of the motor rotor supporting the motor is too expensive due to blind design, and a large amount of magnetic material is wasted. Resources, conventional permanent magnet synchronous motors, can be used for both constant speed synchronous operation and variable frequency stepless speed regulation synchronous operation; it has the advantages of high efficiency, energy saving, stable operation, and simple control, but the utilization rate of its permanent magnet materials is low , the cost is higher, and its popularization and application are limited. Contents of the invention [0003] In view of this, it is necessary to provid...

AI Technical Summary

Problems solved by technology

[0002] The motor rotor is an essential part of the motor. At present, the internal structure of the permanent magnet motor produced, sold and used in the market is complicated, and the magnetic material of the motor rotor supporting the motor is too expensive due to blind design, and a large amount of magnetic material is wasted. Resources, conventional permanent magnet synchronous motors, can be used for both constant speed synchronous operation and variable frequency stepless speed regulation synchronous operation; it has the advantages of high efficiency, energy saving, stable operation, and simple control, but the utilization rate of its permanent magnet materials is low , the cost is high, and its popularization and application are limited

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