First, in simple terms, their differences are:
Brushed DC Motor has a set of carbon brushes fixed on the rotor that are in contact with the AC excitation electrodes to provide the electromagnetic field required by the rotor;

There are no fixed carbon brushes on the rotor of a Brushless DC Motor, and the rotor generates an electric field through a sensor-controlled controller.

Advantages and Disadvantages of Brushless DC Motors

Advantages:

1. Electronic commutation replaces traditional mechanical commutation, with reliable performance and low failure rate;
2. It is a static motor with small no-load current;
3. The parts wear less and have a long service life, so there is no need to replace brushes;

4. Able to move at higher speeds;

5. With high efficiency and small size, it is suitable for light, small, high-speed modular and integrated applications.

Shortcoming:

1. There is slight vibration when starting at low speed. If the speed increases and the commutation frequency increases, the vibration will not be felt;

2. It is easy to form resonance, because everything has a natural vibration frequency. If the vibration frequency of the brushless motor is the same as or close to the vibration frequency of the frame or plastic parts, it is easy to form resonance. However, the resonance can be adjusted through adjustment. phenomenon is reduced to a minimum. Therefore, it is normal for electric vehicles driven by brushless motors to sometimes make a buzzing sound. 3. The control is more complex and requires more precise control algorithms and high-precision sensor information input;

4. The cost is higher.

Advantages and Disadvantages of Brushed DC Motors
advantage:
1. The speed change is smooth and vibration is almost not felt;
2. Low temperature rise;
3. Easy to control when starting to rotate;

4. Can operate under overload conditions higher than the rated load;

5. Maintenance is relatively simple and the price is relatively cheap.

shortcoming:
1. Carbon brushes are easy to wear and have short service life, so they need to be replaced frequently;
2. The operating current is large and the motor magnets are easy to demagnetize, which reduces the life of the motor.
3. It is easy to lose speed under light load, the speed fluctuates greatly, and the accuracy is not high;

4. Electromagnetic interference (EMI) and electronic noise are large.

Brushless motors are becoming more and more widely used because they have the advantages of high power density, low wear and durability, and are suitable for high load and high speed applications; brushed motors have the advantages of strong execution and relatively cheap price, and are still used in certain applications. Maintain certain competitiveness in application fields