Production method for hub motor rotor with embedded radial permanent magnet steel and embedded tangential permanent magnet steel

Abstract

The invention provides a production method for a hub motor rotor with embedded radial permanent magnet steel and embedded tangential permanent magnet steel, and belongs to the technical field of automobile motors and electrical appliances. Rectangular permanent magnet steel is embedded in a radial rectangular groove and a second tangential rectangular groove of a rotor core respectively to form an embedded permanent magnet rotor. The structure is a rotor magnetic bypass structure, the problem that irreversible demagnetization happens to the permanent magnet steel under the action of armature reaction of impulse current can be effectively prevented, it is guaranteed that the permanent magnet steel does not lose magnetism, and meanwhile a hub drive motor rotor field is jointly provided by a radial magnetic field and a tangential magnetic field. Besides, the hub motor rotor with the embedded radial permanent magnet steel and the embedded tangential permanent magnet steel has the advantages that magnetic field intensity is high, output power is high, efficiency is high, power density is high, the structure is compact, and working is reliable.

Description

technical field [0001] The invention provides a method for producing a rotor of a steel hub motor embedded with radial and tangential permanent magnets, and belongs to the technical field of automobile motors and electrical appliances. Background technique [0002] At present, most of the production methods of permanent magnet drive motor rotors used in electric vehicles adopt the permanent magnet external embedded structure, such as the existing technology, patent name: brushless DC motor rotor, patent number: ZL200920116549.1, discloses the following technical solutions, Including rotor core, rotating shaft and permanent magnet, the rotor core is composed of punched sheets and connected into one, the rotating shaft is fixedly connected with the rotor core, the outer surface of the rotor core is evenly distributed with an even number of T-shaped wedges, adjacent T Slots are formed between the shaped wedges, and the permanent magnets are correspondingly embedded in the slots...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the production methods of permanent magnet drive motor rotors used in electric vehicles adopt the permanent magnet external embedded structure, such as the existing technology, patent name: brushless DC motor rotor, patent number: ZL200920116549.1, discloses the following technical solutions, Including rotor core, rotating shaft and permanent magnet, the rotor core is composed of punched sheets and connected into one, the rotating shaft is fixedly connected with the rotor core, the outer surface of the rotor core is evenly distributed with an even number of T-shaped wedges, adjacent T Slots are formed between the shaped wedges, and the permanent magnets are correspondingly embedded in the slots. The permanent magnets of the rotor with this structure directly face the air gap. Under the action of the armature reaction of the impact current, irreversible demagnetization may occur. Once the permanent magnets are formed irreversible Demagnetization, the efficiency of the drive motor decreases, the power and torque drop rapidly, and its performance needs to be further improved

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