How do the two Hall elements detect to make the brushless motor change phase?

Posted by Fengyukun on

Brushless motors require the use of Hall elements to detect the rotor position for proper phase change for proper motor operation. Usually two Hall elements are used to detect the rotor position.
This is implemented as follows:

1: Two Hall elements are mounted on the stator of the brushless motor at a certain offset angle relative to each other.
2: When the rotor rotates close to the first Hall element, the element will detect the magnetic field and output a signal indicating that the rotor has turned to the corresponding position.
3: Based on the received signal, the motor controller determines the current position of the rotor and controls the phase change of the motor, transferring the current to the correct winding and driving the motor to continue rotating.
4: When the rotor continues to rotate close to the second Hall element, the signal from the first Hall element will be ignored and the second Hall element will output a signal and the controller will again judge the rotor position and continue to control the phase change of the motor.

In this way, the brushless motor can accurately detect the rotor position and perform the correct phase change, thus achieving stable and reliable operation. Since brushless motors have the advantages of high efficiency, low noise and high accuracy, they have a wide range of application prospects in various applications.

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