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Quadcopter UAV brushless drone motor manufacturing

Release time:2024/02/05

Quadcopter UAV brushless drone motor manufacturing


In the past decade, the application of drones has become increasingly popular. Aerial photography, surveillance and inspections, film and television entertainment, transportation, agriculture, forestry, police security, surveying and mapping, logistics and other fields have shown significant growth in demand for drones.


The power source of the quad-rotor drone is mainly four motors. The electrical energy provided by the motor is converted into machinery to rotate the propeller of the drone to achieve flight. The motor is mainly composed of a stator, a rotor, an iron core, magnets, etc. The motors used are mainly brush motors and brushless motors.


The main structure of a brushed motor includes a stator, a rotor and a brush. The brushes are in constant contact with the steering gear and play a role in conduction and commutation during rotation. They obtain rotational torque through the rotating magnetic field and output electrical energy.


The main components of a brushless motor include a stator, a rotor, a position sensor and an electronic switch circuit. However, in order to reduce the weight of model aircraft and small drones, there is no position sensor in the structure of the drone, but electronics are used instead. governor. In terms of rotor type, the majority of UAV brushless motors have rotors other than rotors.


Comparing the two motors, the brushed motor can work continuously for about 5,000 hours and has a service life of between 2-3 years; while the brushless motor can work continuously for more than 20,000 hours, and the service life is 2-3 times that of the brushed motor. It can be used for 7-10 years. At the same time, the brushless motor is more energy-saving, and its power consumption is only 1/3 of the brushed motor.


Although the electronic switching circuit of the brushless DC motor is very complex, compared with similar products, based on considerations such as stability, operating noise, mechanical performance, electromagnetic interference, service life, power per unit volume, torque-to-weight ratio, energy consumption, etc. The BLDC motor is the mainstream choice for quadcopter drone motors.


The power source of the quad-rotor UAV comes from the motor driving the rotating propeller to rotate. In the process of converting electrical energy and kinetic energy by the brushless motor, the outer rotor needs to be continuously rotated. The outer rotor is a cylinder inside which is usually a permanent rare earth magnet: (samarium cobalt) SmCo or (neodymium iron boron) NdFeBo. The stator is formed from coils wound around a polar iron core of ferromagnetic material. As current circulates through the coils, new magnetic poles are created, which interact with the rotor's permanent magnetic poles, causing the machine to spin. 


Quadcopter UAV BLDC outer rotor

The interior of the outer rotor is static and the outer shell rotates. Generally speaking, the embedded magnetic steel (permanent magnet) part will rotate, but the coil part does not rotate, thereby achieving energy conversion.

The advantages of the outer rotor are also reflected in the rotation. The fully enclosed structure allows the outer rotor to run quickly after startup, with low overall power consumption and fast rotation speed, showing high efficiency. However, there are also problems such as large rotor inertia and loud noise, so the outer rotor has higher quality requirements. During the processing and production of outer rotor components, there will be problems such as uneven materials, blank defects, processing and assembly tolerances, etc. The imbalance of each component will accumulate during the assembly process, resulting in a large initial imbalance of the assembled outer rotor. If it is not corrected properly, It will cause severe vibration and loud noise, which may affect the flight of the drone in severe cases.


Quadcopter UAV BLDC stator winding

The structure of the stator winding of a quadcopter drone directly determines the efficiency of the motor. A good winding structure can reduce the resistance during current conduction and improve motor efficiency. When producing brushless motors for drones, the winding process is very important. If the winding effect is not good, it will directly affect the use of the drone. The NIDE drone brushless motor stator winding machine adopts automatic winding machine technology to meet the needs of winding multiple motor products at the same time, with high efficiency and high precision.

The manufacturing of brushless motors for drones requires multiple considerations and comprehensive measurements to find the optimal solution to achieve efficient performance and stable operation. Ningbo Nide Mechanical Equipment Co., Ltd. focuses on providing customers with one-stop motor manufacturing solutions. We have provided UAV motor stator assembly lines, UAV motor stator manufacturing lines, UAV motor outer rotor production lines, and UAV motor stator assembly lines for customers in different countries. Motor accessories, such as NdFeB magnets, bearings, shafts, motor casings, etc. We can customize and develop drone motor manufacturing equipment according to market and customer needs, and assist customers in developing small, light-weight drone motor products with powerful functions, covering aerial photography drones, FPV traversing drones, and agricultural drones. , plant protection drones, single-rotor drones, multi-rotor drones, fixed-wing drones, etc.


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