1, if the idle speed is obviously fast, but there is no noise or carrier sound, it belongs to phase dislocation, and the coarse motor line (phase line) and the hall line (small line) are wrongly connected;

2, the motor can't start by itself, but everything turns normal, and it will ring and shake when manned, which belongs to the motor phase, and the three-phase wire (thick line) of the motor is not energized;

3, the motor is not loaded and everything is normal, and the speed will not be obviously fast, but it will ring or shake when manned, which belongs to Hall's poor contact, not all of which is just one of the lines;

4. The motor starts normally, and it can carry people, but it's just sound. Because the controller starts over speed, the Hall signal is reversed in advance. Just adjust the controller.

5, the start is not normal, it will tremble as soon as it starts, and the motor speed will obviously slow down, that is, the Hall is broken, or the contact is not good, so that it will work without Hall.

Electric vehicles are divided into AC electric vehicles and DC electric vehicles. Generally speaking, an electric vehicle is a vehicle that uses batteries as energy source and converts electric energy into mechanical energy through controllers, motors and other components to control current and change speed. The first electric car was made in 1834. It is driven by a DC engine. Today, great changes have taken place in various types of electric vehicles.