Production technology of coreless micro brushless DC (Direct Current) motor

Abstract

The invention discloses a production technology of a motor and particularly relates to a production technology of a coreless micro brushless DC (Direct Current) motor. The production technology comprises the following steps of: winding and integrating a varnished wire into a coil with the diameter of 10mm-100mm by a coil winding mold, adding glue to solidify and bake the coil, mounting the coil in a coil fixing base, and then, mounting a bearing on the fixing base to get a semi-finished stator; placing an inner shell in an end cover clamp, adding the glue to form an end cover pressed inner shell with the diameter of 10mm-60mm, pasting a magnet on an outer circle of the inner shell by a magnet grading mold; reinforcing the outer circle of the magnet; placing an outer shell in the end cover clamp, and adding the glue to form an end cover pressed outer shell with the diameter of 10mm-100mm; adding the glue to paste the magnet on an inner circle of the outer shell by the magnet grading mold; reinforcing the magnet on the inner circle of the outer shell, then, baking in a roaster at 60-200 degrees centigrade for 1-4 hours; placing the end cover pressed outer shell into a pressing shaft branch by an end cover mold to obtain a semi-finished rotor with the diameter of 10mm-100mm; and assembling the stator and the rotor with other components to form the coreless micro brushless DC motor.

Description

technical field [0001] The invention relates to a production process of a motor, in particular to a production process of a miniature brushless DC motor without an iron core. Background technique [0002] At present, the DC motors used in remote control aircraft models, household appliances, and personal care tools are generally DC motors with carbon brushes and iron cores, or brushless DC motors with iron cores. The working principle of this motor is to use silicon Steel sheet to excite, or enhance the magnetic field strength, the disadvantages are: [0003] 1. The production of iron core requires mold opening, and the mold cost is high; [0004] 2. The weight of the motor with iron core is heavy, which is not conducive to products that need to use the power generated by the motor to overcome its own gravity or human hand-held products, such as aircraft models, personal care tools, etc.; [0005] 3. The motor with iron core is easy to form eddy current, so the temperature...

AI Technical Summary

Problems solved by technology

[0003] 1. The production of iron core requires mold opening, and the mold cost is high;

[0004] 2. The weight of the motor with iron core is heavy, which is not conducive to products that need to use the power generated by the motor to overcome its own gravity or human hand-held products, such as aircraft models, personal care tools, etc.;

[0005] 3. The motor with iron core is easy to form eddy current, so the temperature rise is very high, and the efficiency is low in some working environments;

[0006] 4. The motor with iron core has cogging effect when starting, which makes it difficult to start and has high starting current;

[0007] 5. The motor with iron core has iron loss, including hysteresis loss, eddy current loss and residual loss of magnetic materials, etc., and the efficiency is not high