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UAV motor explanation
- Oct 11, 2018 -

Nowadays, we often see people playing small UAV in many parks or open spaces. Every time we see the UAV flying freely in the air under the remote control, it's a really cool feeling. But do you know how the UAV work?


The UAV is an unmanned aircraft operated by a radio remote control device and a self-contained program control device, or is operated autonomously by the on-board computer completely or intermittently. UAV is widely used in aerial photography, agriculture, plant protection, micro-self-timer, express transportation, disaster relief, observation of wildlife, surveillance of infectious diseases, surveying and mapping, news reporting, power inspection, disaster relief, film and television shooting, manufacturing romance and so on.


HM motor

The motor has brushed motor and brushless motor. Structurally, the brushless motor and the brushed motor have similarities, as well as the rotor and the stator, but opposite to the structure of the brushed motor; the rotor of the brushed motor is a coil winding, connected to the power output shaft, and the stator is a permanent magnet Steel; the rotor of the brushless motor is a permanent magnet magnetic steel, which is connected with the output shaft together with the outer casing. The stator is a winding coil, and the commutation brush used by the brushless motor to alternately transform the electromagnetic field is removed, so it is called the brushless motor.


Brushed Motor


Brushed motor has the disadvantages of large friction, large heat generation and low efficiency due to the physical contact between the brush and the phase changer. However, the brushed motor also has the advantages of simple manufacture and low cost, so the brushed motor still has a large share on the market.


Brushless Motor


Brushless motors have the advantages of power, long life and high efficiency. Therefore, the four-axis is made of brushless motor. The appearance of the model brushless motor is as follows. It is different from the brushed motor. The most obvious is that the brushless motor has three wires and is used with the ESC.


Coreless Motor


Coreless motors are DC, permanent magnet and servo micro motors. The coreless motor breaks through the structure of the rotor of the conventional motor, and adopts a coreless rotor. Coreless motors have outstanding energy, control and drag characteristics.


The coreless motor is divided into two types: brushed and brushless. The brushed coreless motor rotor has no iron core, and the brushless coreless motor stator has no iron core.


Motor Model


People often say 2230 motors, 2040 motors, etc. What does it mean? This is actually the size of the motor.


No matter what brand of motor, it must correspond to 4 digits of this type, the first 2 digits are the diameter of the rotor, and the second 2 digits are the height of the rotor. Note that it is not a shell. Simply put, the larger the front 2 bits, the more fat the motor, the bigger the 2nd position, the higher the motor. For example, the common XBD-2230 motor is generally used for the 450 wheelbase aerial camera, and the 2240 machine is generally used for the 210 wheelbase crossing machine.


For coreless motors, they are also named by diameter and height, but generally refers to the size of the outer casing. Such as 4070 motor, 3570 motor, etc.

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