What is a motor?

A: The motor is a component that converts battery electrical energy into mechanical energy and drives the wheels of an electric vehicle to rotate.

What are the common types of motors?

Answer: Common motors include: brushed and geared hub motors, brushed gearless hub motors, brushless geared hub motors, brushless gearless hub motors, side-mounted motors, etc.

What is a stator?

Answer: The part that does not rotate when the brush or brushless motor works. The motor shaft of the hub-type brushed or brushless gearless motor is called the stator, and this type of motor can be called an inner stator motor.

What is a rotor?

Answer: The part that rotates when a brush or brushless motor works. The housing of the hub-type brushed or brushless gearless motor is called the rotor, and this type of motor can be called an outer rotor motor.

How is the power of the motor defined?

Answer: The power of the motor refers to the ratio of the mechanical energy output by the motor to the electrical energy provided by the power supply.

What is electromotive force?

Answer: It is generated by the rotor of the motor cutting the magnetic field lines, and its direction is opposite to the external power supply, so it is called back electromotive force.

How does the motor achieve commutation?

Answer: When the brushless or brushed motor is rotating, the energization direction of the coil in the motor needs to be alternately changed, so that the motor can rotate continuously. The commutation of the brushed motor is completed by the commutator and the brush, and the brushless motor is completed by the controller.

What is phase loss?

Answer: In the three-phase circuit of the brushless motor or the brushless controller, one phase cannot work. The lack of phase is divided into the lack of main phase and the lack of Hall phase. The performance is that the motor shakes and cannot work, or the rotation is weak and the noise is loud. The controller is very easy to burn out when it works in the state of lack of phase.

How to repair the abnormal heating of the motor?

Answer: The method of maintenance is generally to replace the motor, or to carry out maintenance.