Permanent magnet brushless motor, multi-axis aircraft comprising motor and robot comprising motor

Abstract

The invention relates to the technical field of motors and discloses a permanent magnet brushless motor, a multi-axis aircraft comprising the motor and a robot comprising the motor. The motor is a fractional slot outer rotor motor and comprises a stator and a rotor, the stator comprises a stator core and a stator winding. The stator winding is a centralized winding, and the stator core is of an integrated structure. The stator core comprises a stator yoke part and a stator tooth part. The stator tooth part comprises a plurality of stator teeth arranged on the stator yoke part, and an insulating layer is arranged on the surface of each stator tooth; the stator winding comprises a preset number of winding coils formed by machine winding, and each stator tooth is sleeved with x winding coils,wherein x is greater than or equal to 1; the rotor comprises a permanent magnet and a rotor core, and the permanent magnet is used for excitation to generate a rotating magnetic field. According to the embodiment of the invention, the slot fullness rate can be improved and the electromagnetic design is optimized under the condition of ensuring low manufacturing cost, so that the motor constant, the motor efficiency and the power output of the motor are improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a permanent magnet brushless motor and a multi-axis aircraft and a robot including the same. Background technique [0002] In recent years, multi-axis aircraft represented by multi-axis drones have developed rapidly, playing an important role in fields such as plant protection, aerial photography, delivery, reconnaissance, rescue, and survey. Multicopters place high demands on motors. With the same output power, a lighter and more efficient motor means that the load can be increased or the battery capacity can be increased, thereby improving the flight time and performance of the aircraft. [0003] At present, the motors of existing multi-axis aircraft, especially multi-axis drones, use stators with boots, and the winding coils are wound by special stator winding machines, which greatly limits the slot fullness of the motors. Taking products as an example, the full rate of the m...

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Problems solved by technology

[0003] At present, the motors of existing multi-axis aircraft, especially multi-axis drones, use stators with boots, and the winding coils are wound by special stator winding machines, which greatly limits the slot fullness of the motors. Take the product as an example. Generally, the full rate of the motor slot of a multi-axis aircraft is only about 30%, resulting in low power output per unit weight and unit volume, motor constant, and motor efficiency.

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