Many people don't know much about brushless motors, but many places in our daily life are full of them, such as vacuum cleaners, aircraft models, electric fans, etc. The brushless motors are not very clear. So what is a brushless motor? Which is better, brushless motor or brushed motor? Let's take a look at the advantages of brushless motors.
1. What is a brushless motor?
A brushless motor consists of a motor body and a driver, and is a typical mechatronic product. The brushless motor does not use a mechanical brush device, but adopts a square wave self-controlled permanent magnet synchronous motor, which works by changing the polarity of the internal winding of the motor. It is widely used in aircraft models, high-speed car models and ship models.
Second, the difference between brushless motor and brushed motor
3. Advantages of brushless motors
1. Brushless is faster than brushed
Assume that brushed and brushless motors are rated the same. In this case, a brushless motor will be faster because it is more efficient than a brushed motor. This results in optimal power usage for brushless motors due to less friction and less heat generation, where the speed of a brushless motor is limited by the motor's brushes and commutator, while the speed of a brushless motor is determined by the bearings and the motor's speed. speed control device.
2. The brushless motor is more efficient
Brushless DC motors offer several advantages over brushed motors. One of them is efficiency. The efficiency of brushless motors can reach more than 85% to 90%, and the efficiency of brushed motors can reach 75% to 80%. Since there are no brushes in the motor, mechanical energy losses are low, allowing efficient use of the supplied energy. This is why brushed motors are less efficient than brushless motors.
3. The brushless motor has a longer service life
Brushless motors can run for more than 10,000 hours if adequate care is taken when using the motor's limitations and other Class II specifications. Brushed motors wear out faster than brushless motors because brushed motors contain commutators and brushes, which cause mechanical and electrical friction between them during operation. Over time, motor brushes wear out due to electro-erosion.
4. The brushless motor is quieter
Motors with more moving parts can cause more confusion or noise due to friction, loose screws, etc. Brushless motors are quieter than brushed motors due to electrical and mechanical noise from friction with the commutator, where there are no moving parts that can cause friction or other noise. This is why brushless motors are quieter relative to other motors.
5. Brushless motor is more reliable
The service life of brushless motors is much higher than that of brushed motors. Brushless motors are more reliable because they have few moving parts, so there is less friction, less energy loss, less electrical or mechanical power loss, noise, wear, etc. These are the benefits of having few moving parts in the motor, which helps extend the life of the motor and makes the motor smaller, more compact, lighter, more efficient, etc.
In recent years, brushless motors have been used in motor products. After reading it, I believe everyone will know the reason. The advantages of brushless motors are many, and their cost is higher than that of brushed motors. How to choose can be based on actual needs.
