What are the differences between AC motors and DC brushless motors, and which is more popular?

In daily production and life, the application of DC brushless motor and AC motor are more extensive, have their own advantages, because they are motors, many friends are not clear, and do not understand the composition and operation of the two, the following NOYU simple to give you an analysis of it!
 

1. Ac motor supply voltage for AC input, the use of AC switch control, like thyristor, to be able to withstand voltage. There are coils in the AC motor, the resistance value is generally relatively small, to phase shift for example, it is divided into start winding and running winding.

2. Dc brushless motor is mainly composed of a fixed rotor, the brushless motor commonly used in the early years, with a carbon brush, the motor is installed on the Hall sensor detection position, in the working process, it is constantly in alternating contact with the converter plate, generating alternating electromagnetic field, and constantly rotating. With the advent of brushless motors, this approach has gradually changed; The brushless motor power supply voltage is DC input, which can be controlled by PWM technology, the signal is adjustable, different signals can be input, stepless speed regulation can be carried out, feedback signals can be added, closed-loop speed regulation can be carried out, and it has the braking function, that is, it can be quickly stopped within a certain time range and the output stability is good. Because the volume of brushless motors is much smaller than that of AC motors and brushless motors, brushless motors are increasingly favored by the public.
 

Under normal circumstances, the power of the brushless motor is less than that of the AC motor, especially the DC brushless motor, so the application range is wider, such as the common aerospace, new energy vehicles, intelligent office equipment, power tools and other fields.