What is the difference between AC motors and DC brushless motors, and which one is more popular?

In daily production life, DC brushless motors and AC motors are widely used, have their own advantages, because they are motors, many friends are not clear, and not very well understood the composition and operation of the two, the following Vacuz briefly give you an analysis of it!

1. AC motor supply voltage for AC input, the use of AC switch for control, like thyristor, to be able to withstand voltage. AC motor inside the coil, the resistance value is generally relatively small, to phase shift, for example, it is divided into starting winding resistance and running winding resistance.

2. DC brushless motor is mainly composed of stator and rotor, the brush motor commonly used in the early years, with carbon brushes, Hall sensor installed on the motor to detect the position, in the process of work, it constantly alternating contact with the variable current plate, generating alternating electromagnetic field, constantly rotating. With the emergence of brushless motor, gradually changed this way; brushless motor supply voltage for DC input, can be controlled by PWM technology, adjustable signal, can input different signals, can be stepless speed regulation, can join feedback signal, can be closed loop speed regulation, and has a braking function, that is, it can be stopped quickly within a certain time range, good output stability. As the volume of brushless motor is much smaller than AC motor and brush motor, so brushless motor is more and more favored by the public.

In general, the power of brushless motors is smaller than AC motors, especially DC brushless motors, so the application range is wider, such as common aerospace, new energy vehicles, intelligent office equipment, power tools and other fields.

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