bldc motor needs external controllers to control commutation activities.The following article will examine many ways to achieve this.
Simply put, commutation is the process of switching currents between the phases of the motor to generate motion.For brush motors, physical brushes are used for this purpose (twice rotating each time).However, bldc motor does not have such a mechanism, so an alternative mechanism is needed.The structure of bldc motor means that they can (at least theoretically) have any number of pole pairs for commutation.
Although bldc motor and wire drawing motor have the same basic working principle, the additional external control circuit must be taken into account. To some extent, the more complex control and feedback circuits associated with BLDC impede their application in some applications.
However, stricter international environmental standards are now leading to greater proliferation.
In recent years, engineering innovations related to motor drive technology and better permanent magnets have further supported the transition to bldc motors. With more and more opportunities facing bldc motors, more and more engineers have to consider how to apply this technology to their system design. Because the rotor of BLDC motor is affected by the rotating stator pole, it is necessary to know the position of the stator pole at any given time.This is the function of the bldc motor controller.