What are the symptoms of a faulty Hall sensor?

[LaIsla]

When the Hall sensor is faulty, it can cause issues such as no acceleration or sudden acceleration, the motor may not rotate or rotate weakly with abnormal noises, and even short-circuiting may occur, making the vehicle unable to continue moving after stopping. Here is some related information about the Hall sensor: 1. Introduction to the Hall sensor: The Hall element is essentially a magnetic field sensor used to detect the position of magnetic poles. Since the output from the Hall sensor is just a pulse, it helps control the speed of the brushless motor. Typically, an electric vehicle motor has three Hall sensors placed in sequence to facilitate driving the motor, providing stronger starting torque. 2. Working principle of the Hall sensor: The Hall integrated circuit requires a mechanical method to change the magnetic field intensity, thereby altering the Hall voltage to achieve sensing. The switch controlling the magnetic flux is a rotating impeller. When the impeller's blades are in the air gap between the magnet and the Hall integrated circuit, the magnetic field shifts away from the integrated chip, causing the Hall voltage to disappear. Thus, changes in the output voltage of the integrated circuit can indicate the position of the impeller's drive shaft.