Production method for rotor of hub driving motor with built-in tangential and radial permanent magnet steels

Abstract

The invention provides a production method for a rotor of a hub driving motor with built-in tangential and radial permanent magnet steels, and belongs to the technical field of motors and electric appliances of electric automobiles. Rectangular permanent magnet steels are mounted in corresponding rectangular radial grooves and rectangular tangential grooves of the rotor iron core respectively. The structure is a rotor magnetic bypass structure, so that the irreversible demagnetizing of the permanent magnet steels generated under an armature reaction of the impact current can be effectively prevented so as to ensure that the permanent magnet steels are not demagnetized; meanwhile, the magnetic field of the rotor of the driving motor is jointly supplied by the radial magnetic field and the tangential magnetic field, so that high magnetic field strength and high power density are realized; and in addition, the characteristics of high efficiency, compact structure, reliable operation and the like are achieved as well.

Description

technical field [0001] The invention provides a production method for a built-in tangential and radial permanent magnet steel rotor of a hub drive motor, which 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 sl...

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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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