UAVs have unknowingly penetrated into everyone's lives, but most people still don't know what the UAVs are made of. To briefly summarize the UAV's components, it is composed of the power system, flight control system, transceiver signal transmission system, frame, body stabilization system, GPS and other aspects. Today, Shenzhen ldea-fly will introduce you to the drone motor in the power system.
Let me first talk to you about what is a motor, which is the power source of the drone. The drone changes the flight status of the drone by changing the speed of the motor. That is to change the speed of each motor, so that the drone can hover in the air, rise or fall, or move in all directions.
Motors are divided into "brushless motors" and "brush motors". Most drones on the market now use brushless motors. Brushless motors use semiconductor switching devices to achieve electronic commutation, which has the advantages of high reliability, no commutation sparks, and low mechanical noise. It is generally used in slightly larger aircraft with heavy payload and can have a wider range of uses.
A brush motor is a rotating electric machine that converts electrical energy into mechanical energy (motor) or converts mechanical energy into electrical energy (generator) with a built-in brush device. The brush motor is the basis of all motors. It has the characteristics of fast starting, timely braking, smooth speed regulation in a large range, and relatively simple control circuit.
The model of UAV motor in drone products is generally based on the KV value. For example, model 2312KV960, 23 means that the outer rotor diameter of the drone motor is 23mm, while 12 means that the height of the rotor is 12mm. And KV represents that the actual speed of the motor increases by 960r/min for every 1V increase in voltage.
Many people think that the large KV's motor to increase the propeller must be powerful, but it is not. Compared with the low KV motor of the same level, the high KV motor has higher speed but lower torque. The larger the propeller, the greater the lift force, but correspondingly require greater power to drive. The smaller the motor's KV, the greater the rotation force. The higher the propeller speed, the greater the lift. In summary, a large propeller requires a low KV motor. And vice versa, a high KV motor is required. If a high-KV motor is equipped with a large propeller, it will either not operate normally at all, or the propeller will not rotate enough to leave the ground, or the motor will be too hot and burned, causing a flight accident.