What are the advantages of brushless motors and brushless motors, and what is the direction of development?

1. Comparison of the advantages and disadvantages of brushless motors and brushless motors:

1. Advantages of brushless motors:

- High control accuracy: Brushed motors are usually used in conjunction with reduction boxes and encoders to make the motor output power greater, and the control accuracy can reach 0.01 mm, which can almost stop the moving parts at any position. Precision machine tools usually use DC motors to achieve high control accuracy.

- Simple structure: Brushed motors have a simple structure, easy production and processing, convenient maintenance, and easy control.

- Smooth operation, good starting and braking effects: Brushed motors adjust speed by voltage regulation, and start and brake smoothly, and remain stable when running at constant speed.

2. Disadvantages of brushed motors:

- The friction between the brush and the commutator generates sparks and has great interference.

- High resistance, low efficiency, and low output power.

- Maintenance is cumbersome, and brushes need to be replaced regularly.

- The friction between the brush and the commutator leads to reduced efficiency, increased noise, and easy heat generation, which makes the brushed motor have a shorter life.

3. Advantages of brushless motors:
- Long service life: Since brushless motors use controllers instead of commutators, their service life is several times or even dozens of times that of brushed motors.
- High operating speed: Brushless motors use magnetic field induction and have no actual contact, so they can run faster.
- Low operating noise: Suitable for environments that require quietness, such as hospitals, banks, airports, schools, etc.
- Spark-free operation: Suitable for flammable and explosive places to improve safety.
4. Disadvantages of brushless motors:
- Higher cost: The increased cost of the controller makes the cost of brushless motors at least 100 yuan higher.
- Limited use environment: Brushless motors may fail in strong magnetic field environments because the rotor components are made of magnets, and high magnetic fields may change the rotor magnetic field or eliminate part of the magnetism.