Production method of electric car hub driving motor stealth magnetic pole rotor

Abstract

The invention provides a production method of an electric car hub driving motor stealth magnetic pole rotor, and belongs to the technical field of an electric car motor electric appliance. The production method is characterized in that permanent magnet steel are respectively embedded in a rectangular radial slot and an arc-shaped slot of a rotor core; the structure is a rotor magnetic bypass structure, and can effectively prevent the permanent magnet steel from generating irreversible demagnetization under the armature reaction of the impulse current so as to guarantee no magnetic loss occurs in the permanent magnet steel; and at the same time, a hub driving motor rotor magnetic field is provided by the permanent magnet steel. The production method of an electric car hub driving motor stealth magnetic pole rotor has the advantages of having no demand for electrical excitation winding, consuming less electric energy, having non carbon brushes and mechanical commutators, being low in failure rate, being compact in structure, and being reliable in working.

Description

technical field [0001] The invention provides a method for producing an invisible magnetic pole rotor of an electric vehicle hub drive motor, which belongs to the technical field of electric vehicle motors and 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. The permanen...

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

Images