A motor for unmanned aerial vehicles and its assembly method

Abstract

The invention discloses a motor for an unmanned aerial vehicle and an assembly method thereof, comprising a stator, a rotor and a stator bracket, the stator is installed on the outer wall of the stator bracket with an interference fit, the rotor is located at the periphery of the stator, and the stator includes a first stator iron Core, winding insulation skeleton, stator winding, second stator core and wedge key, the stator bracket includes an integrally formed stator bracket inner ring part and stator bracket outer ring part, the inner wall of the iron core ring body and the outer wall of the stator bracket inner ring part Interference fit, the upper end of the inner ring of the stator bracket is provided with inner ring grooves, the rotor includes rotor brackets, magnetic steel, spacers, deformed reeds, rotor pressure plates and rotating shafts, the rotor bracket includes rotor rings and bracket discs, and the rotor ring The upper end of the part is provided with a magnetic steel groove, and the magnetic steel is evenly arranged in the magnetic steel groove in the circumferential direction, and the rotating shaft and the bracket plate are installed with interference fit. The motor of the invention is simple and convenient to assemble, has good heat dissipation effect and good sealing effect.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a motor used for drones and an assembly method thereof. Background technique [0002] At present, drones have been widely used, and the demand for motors of drones has increased dramatically. The general characteristic of the motor of the UAV is that the stator is inside and the rotor is outside. [0003] In the prior art, the stator core of the UAV motor is integrated, and the stator winding is stuffed in from the gap on each slot of the stator core. It is very troublesome to get off the wire, and the wire is very loose, and there must be a margin for the wire. Otherwise, it is difficult to put it in, the two ends of the stator winding protrude longer, the loss of the stator winding is large, and the power density is low. [0004] The rotor magnet of the UAV motor is pasted with an indexing plate, which requires precise positioning operations, and the heating of the motor will ...

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Problems solved by technology

[0003] In the prior art, the stator core of the UAV motor is integrated, and the stator winding is stuffed in from the gap on each slot of the stator core. It is very troublesome to get off the wire, and the wire is very loose, and there must be a margin for the wire. Otherwise, it is difficult to put it in, the two ends of the stator winding protrude longer, the loss of the stator winding is large, and the power density is low

[0004] The rotor magnet of the UAV motor is pasted with an indexing plate, which requires precise positioning operations, and the heating of the motor will make the pasted magnet unstable.

[0005] At present, the UAV motor is air-cooled by the airflow rotated by the blades. The heat dissipation effect is not good, which will shorten the service life of the bearing. At the same time, the increase in heat will also make the rotor magnet unstable, which needs to be improved.

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