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How to realize the sensorless brushless controller

Inductive or non-inductive DC motors are used in different application scenarios.bldc motor controller  Today, let's take a look at how the brushless controller realizes sense or no sense?

 

What is an inductive? How is a brushless controller implemented? An inductive motor senses the state and position of the rotor through the Hall element in the motor. The position of the rotor can be known at rest.

 

What is sensorless? How is the brushless controller implemented? The sensorless motor uses the ESC back EMF signal to determine the rotor position commutation. The non-inductive motor needs to be turned to judge the position of the rotor, and it will shake when it is just starting.

 

Inductive brushless motor is a relatively mature solution at present, and its operation is more stable. It is more suitable to use inductive ones for large loads or large load changes. It is best for manufacturers to choose a brushless motor that suits them according to the use environment and their own requirements.

 

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Principle of brushless motor controller