Performance difference between brush and wholesale rc brushless motor
The DC brush motor has the advantages of fast starting response, large starting torque, stable speed change, almost no vibration from zero to maximum speed, and can drive more load when starting. The starting resistance of the BLDCM is large (inductive reactance), so the power factor is small, the starting torque is relatively small, there is a buzz when starting, accompanied by strong vibration, and the driving load is small when starting.
DC brush motor runs smoothly with good starting and braking effect
The brush motor is regulated by voltage regulation, so the starting and braking are stable, and the constant speed operation is also stable. The BLDCM is usually controlled by digital frequency conversion. First, the AC is changed into DC, then DC is changed into AC, and the speed is controlled by frequency change. Therefore, the BLDCM runs unevenly and vibrates greatly during starting and braking, and only when the speed is constant can it be stable.
High control accuracy of DC brush motor
DC brush motor is usually used together with reducer and decoder, which makes the output power of motor larger and control accuracy higher. The control accuracy can reach 0.01mm, and it can almost make the moving parts stop at any desired place. All precision machine tools are controlled by DC motor. Because the starting and braking of the BLDCM are not smooth, the moving parts will stop at different positions every time. Only through the locating pin or the limiter can the motor stop at the desired position.
