The professional-grade market is gradually emerging, and the drone motor welcomes a new round of development opportunities.
In the case that consumer-grade drones have become the Red Sea, professional-grade drones have ushered in a period of rapid development, but professional-grade drones have particularly high requirements for related motor and motor control. Whether to provide more accurate and more stable motor and control solutions is an important part of grasping the rapid development of professional-grade drones.
After the drone market was brought to the wind, many industries upstream of the supply chain revived, and the electric motor was one of them. The motor of the drone industry started from the model airplane, to the consumer-grade drone, and now to the industrial-grade drone, and the requirements for precision, stability and reliability are getting higher and higher.
Some people in the industry pointed out that the drone machine can hardly make any money, but it does make money from carbon fiber, battery, and even upstream companies such as landing gear. Probably this is what made the enterprises that were originally engaged in ordinary motor manufacturing see hope. Some enterprises began to take this opportunity to switch to the UAV motor market. Even enterprises that originally engaged in smart terminals, security, and even toys entered large quantities. Human machine field.
In fact, the motor is an abbreviation, generally called a motor. It is a kind of converter that converts electrical energy into mechanical energy. It consists of a stator, a rotor, a core and a main part of magnetic steel. The working principle of the motor is similar to that of a magnet. The same electrode is generated by electricity and mutually repelled, resulting in motor rotation.
The drone was first developed in the era of aircraft model. Since the model is the predecessor of the drone, what kind of motor was the model used at the earliest? The first model used in the model was a brush motor with a built-in mechanical commutator. The rotor was the middle core. There were more than three pieces of copper at the back end of the core. The copper piece was clamped to the upper side by a carbon brush. Coil powered. As the motor rotates, the carbon brushes sandwiched between the two sides are fixed, which also acts as a commutation during the rotation of the motor. This can also be called a commutator, and the commutator continues to rotate with the motor. The direction of the change is made, and the outer side of the rotor is tightly attached to the motor casing by two pieces of magnetic steel.
However, the brush motor is bulky, bulky, low in power, short in life, and the carbon brush is easy to wear with a long time of work or excessive voltage, and the wear is very serious in a short time. Therefore, the current brushless motor has gradually replaced the brush motor.
The brushless motor does not have the same internal displacement device as the brush motor. It cannot work independently, and must have the cooperation of the commutator, that is, the brushless ESC can work. There is also an outer rotor motor in the brushless motor. This type of motor has good heat dissipation and a large number of magnetic poles. The torque is larger than that of the inner rotor motor and the rotation speed is low. Most of them are used in aircraft models and drones.
Brushless motors have a much longer life due to the absence of carbon brushes. In addition, the brushless motor speed is much higher than the brush motor speed. This has also caused some problems. When the early brushless motor was first introduced, it was often used in conjunction with low-speed paddles, often "popping the shell" and "exploding the paddle". The blasting shell means that the motor speed is too high, and the motor casing bursts due to excessive centrifugal force, causing the magnetic block to fly out quickly. The explosion is similar, that is, after reaching a certain speed, the propeller flies out from the motor to the periphery due to centrifugal force or other force. In addition, the brushless motor uses an external electronic commutator, the commutation frequency is 8KHZ, and the frequency is very high, which also causes the motor power to increase a lot. Compared with the brush motor, the weight is also much lighter.
When the brushless motor gradually captured the drone market, it also led to the red fire and electric adjustment of another accessory. Since the brushless motor cannot work independently, it must be operated as a commutator to work, so the ESC market is also brought up.