A kind of production method of radial permanent magnet rotor of drive motor of electric van transport vehicle

Abstract

The invention discloses a production method of a radial permanent-magnet rotor of a drive motor of a power-driven transport van, and belongs to the technical field of vehicle drive motors. The production method includes the following steps that center circular holes for installing a shaft (2) are drilled in the centers of a plurality of rotor sheets, and an even number of rivet circular holes are evenly formed in the circumferences of the rotor sheets, wherein the distance between the outer end of each rivet circular hole and the outer circle of the corresponding rotor sheet ranges from 1mm to 4mm; the rotor sheets are overlaid according to the uniform sequence of burrs and are riveted through iron rivets (4) to form a rotor iron core (3); tile permanent-magnet steel (6) is fixed to the outer circle of the rotor iron core (3) by screws (5) through pole shoes (7) in the form that N poles and S poles are alternatively arrayed on the protruding faces; the rotor iron core (3) is arranged on the shaft (2) in a pressing mode, and accordingly assembling of the radial permanent-magnet rotor of the drive motor of the power-driven transport van is completed. The rotor produced according to the production method can effectively avoid irreversible demagnetization generated by the permanent-magnet steel under the action of the armature reaction of impact current and protect the permanent-magnet steel against loss of excitation.

Description

technical field [0001] The invention relates to a production method of a radial permanent magnet rotor of a drive motor of an electric van transport vehicle, which belongs to the technical field of vehicle drive motors, and specifically relates to a production method of a radial permanent magnet rotor of a vehicle permanent magnet drive motor. Background technique [0002] At present, the production methods of permanent magnet drive motor rotors used on electric van transport vehicles mostly adopt the external embedded structure of permanent magnets. For example, the patent number is: ZL200920116549.1, and the patent name is: the patent of brushless DC motor rotor, which is disclosed as follows The technical solution includes the rotor core, the rotating shaft and the permanent magnet. The rotor core is composed of punched sheets and connected together. The rotating shaft and the rotor core are fixedly connected. An even number of T-shaped wedges are evenly distributed on the...

AI Technical Summary

Problems solved by technology

[0002] At present, the production methods of permanent magnet drive motor rotors used on electric van transport vehicles mostly adopt the external embedded structure of permanent magnets. For example, the patent number is: ZL200920116549.1, and the patent name is: the patent of brushless DC motor rotor, which is disclosed as follows The technical solution includes the rotor core, the rotating shaft and the permanent magnet. The rotor core is composed of punched sheets and connected together. The rotating shaft and the rotor core are fixedly connected. An even number of T-shaped wedges are evenly distributed on the outer surface of the rotor core. Slots are formed between adjacent T-shaped wedges, and permanent magnets are correspondingly embedded in the slots. The permanent magnets of the rotor with this structure directly face the air gap. Under the armature reaction of the impact current, irreversible demagnetization may occur, and the permanent magnets Once irreversible demagnetization is formed, the efficiency of the motor will decrease, and the power and torque will drop rapidly, and its performance needs to be further improved.

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