What is brush motor?
When the brush motor works, the coil and commutator rotate, the magnetic steel and the carbon brush do not rotate, and the coil current direction changes alternately.
It is accomplished by commutator and brush that rotate with the motor.
What is brushless motor?
The brushless motor provides DC power in different current directions by the controller to achieve alternate transformation of the current direction of the motor coil.
Brushless motors have no brushes and commutators between rotor and stator.
Brushless motor is replaced by electronic commutation instead of mechanical commutation, which is superior to brush motor. The brush of brushes motor is easy to wear, resulting in the reduction of the life of the motor. However, the efficiency of brushless motor is worse than that of brush motor in a certain current range. But brushless motors run almost without noise, and their life span is longer than 10 years.
Combining the advantages and disadvantages of the two, the brushless motor is superior to the brush motor.
The difference between brushless motor and brushless motor is whether there are commonly used brush commutators. The commutation of brushless DC motor is always realized by contacting graphite brush with annular commutator mounted on rotor.
The brushless motor feedback the rotor position back to the control circuit through the Hall sensor, so that it can get the accurate time of the motor phase commutation. Most of the motors produced by brushless motor manufacturers have three Holzer effect positioning sensors. Since brushless motors have no brushes, they have no interfaces, so they are cleaner, less noisy, virtually maintenance-free, and have a longer life.
In the last 30 years, the research on variable frequency speed regulation of asynchronous motor is to find a way to control the torque of asynchronous motor. Rare earth permanent magnet brushless DC motor will show its advantages in the field of speed regulation because of its wide speed regulation, small volume, high efficiency and small steady-state speed error.
BLDC brushless DC motor is also known as DC frequency conversion because it has the characteristics of brushless DC motor and frequency variation device. The international common term is BLDC. The operating efficiency, low-speed torque, speed accuracy and so on of BLDC motor are better than any control technology inverter, so it deserves the attention of the industry. This product has been produced. More than 55kW, it can be designed to 400kW, which can solve the demand of power saving and high performance driving in the industry.
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