commonly known as the motor, can make the uav propeller rotation to generate power. Uav rotorcraft more power from the propeller, the propeller is the result of the motor rotation.
the types of motor and the difference between the
general motor is divided into a brush and brushless motors. For more rotor unmanned aerial vehicle (uav), the small unmanned aerial vehicle (uav) usually use a brush motor, such as hollow cup motor; The wheelbase is larger, usually greater than 200 mm unmanned aerial vehicle (uav) is using brushless motor. At present, a lot of uav is given priority to with permanent magnet synchronous motor in the brushless motor.
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so why motor divided into brush and brushless? In simple terms, a motor is the use of carbon brush, change the direction of current brushless motor is abandoned the carbon brush, use electronic commutation, reduce the wear and tear.
life
brushless motor: can work continuously for 20000 hours or so, the service life of conventional 7 -For 10 years.
has brush motor: can work continuously for 5000 hours or so, the service life of the conventional 2 -For three years.
note: working hours to use the environment (Mainly temperature), the higher the temperature, the lower the efficiency, so attention should be paid to guarantee the motor temperature within the scope of the benign, can greatly increase the service life of motor and effects.
to save
contrast, brushless motor power consumption is only have 1/3 of the motor.
in the future repairs
after a brush motor wear, not only to replace carbon brush, also change the turning gear motor peripheral accessories, such as costs are much higher. The most important is, it will affect the function of the whole.
and brushless motor without brush, mainly on the bearing wear and tear, and from the mechanical point of view, brushless motor is almost a maintenance-free motor, when necessary, the only need to do some cleaning maintenance.
basic parameters of the motor
maximum current (一)The maximum voltage (V）KV value.
KV value: refers to the speed of the motor voltages in the unit. General KV value is higher, on behalf of the faster the speed of the motor.
for example: the KV value is 1000, meaning is: under the 1 v voltage, the motor speed of 1000 rotations per minute (RPM).
is under 10 v voltage, the motor speed as: 10 v * 1000 KV = 10000 RPM
as a result, in order to improve the speed of the motor, low KV value of motor can be done by increasing the voltage, but think about motor, must consider the voltage limit.
motor named
four digits, the first two is the diameter of the stator, the two are the height of the stator. Such as 4108 specifications of the motor, the stator is 41 mm in diameter, height is 8 mm.
how to matching motor
many rotor motor total maximum tension should not be less than the total weight of 1. Five times, had better be to double up.
number matching motor must pay attention to the KV and corresponding to the battery voltage and the screw size. Of businesses generally given motor parameter table, including the recommendation with OARS pulling force and current as well as the corresponding case, according to these parameters can choose the corresponding electronic governor and propeller.
the motor should be how to maintain the
if drones appear when hovering roll or can't smooth landing, a cause, is likely the motor out of the question. Can try to correct the fuselage before take-off. If there is still a problem, so be sure to send a factory inspection, avoid motor stalling resulted in unmanned aerial vehicle (uav) is out of control and even crash.
in addition, the unmanned aerial vehicle (uav) flight confirmation before motor with propeller is fixed, flight check in time after cleaning machine whether to hide the dirt.
