Motor braking is two operating processes opposite to motor starting. The starting process is the running process of the motor from static to rated speed, while the motor braking is the process of the motor from dynamic to stop. Starting from the specific conditions of the equipment driven by the motor or the actual operating conditions, some motors may achieve a relatively natural stop motion by cutting off the power, that is, the motor will go through the process of speed from fast to slow and then stop. The time required for this process It will be longer; and some operating conditions do not allow this process, the motor must stop running in a short period of time or even instantaneously, which requires the use of external forces for braking. The more common braking methods are as follows:

While cutting off the power supply of the motor, the motor is quickly stopped by using a mechanical device. At present, there are two types of electromagnetic brakes and electromagnetic clutches that are commonly used. The characteristic of this braking method is that the rotor of the motor is braked by other mechanical devices other than the motor body. The dynamic function starts immediately, which will not cause the motor to increase the current due to braking, and also ensures the timeliness of braking. The key to the control of this braking method lies in the clearance adjustment of mechanical action parts. If the adjustment is not appropriate, the motor may run abnormally and the braking effect will not be good.

That is, when the motor cuts off the power supply, it generates a braking electromagnetic torque that is opposite to the actual rotation direction of the motor, and the motor is forced to stop rapidly through the action of electromagnetic force. This braking method is also called coaxial reverse braking. Commonly used methods include reverse braking and energy consumption braking. Compared with mechanical braking, the control of the electromagnetic torque of reverse braking is particularly important. If the torque is too small, the motor cannot stop for a short time, and if the torque is too large, it may cause the motor to rotate in the opposite direction.

In the braking process of the motor, it is a process of energy consumption or conversion, that is, the kinetic energy of the motor is consumed or converted and stored. From the perspective of energy utilization, energy storage is reasonable. This is the basis of the motor braking technology. development needs.