Electric braking mode of motor

2020-09-02 10:41

1. Regenerative braking: under the action of heavy objects, the speed of the motor is higher than the synchronous speed of the rotating magnetic field. At this time, the rotor conductor produces induced current, which produces torque in the opposite direction under the action of the rotating magnetic field.

2. Energy consumption braking: the three-phase AC power supply of the motor is cut off during the energy consumption braking of the motor, and the direct current is fed into the stator winding. When the AC power is cut off, the motor still rotates in the original direction due to the influence of inertia. The characteristic of this mode is that the braking is stable, but DC power supply and high-power motor are required. The cost of DC equipment is very high and the braking force is very small at low speed.

3. Reverse braking: it can be divided into load reverse braking and power reverse braking. The reverse load braking is also called motor reverse load braking. The torque causes the weight to slowly and steadily drop. The power supply does not need reverse connection of motor and braking equipment, and the motor can adjust the braking speed. However, it is only applicable to wound motor, and its rotor circuit needs to be connected with resistance When the speed of the motor is equal to zero, the power supply is cut off immediately. However, this braking mode has the advantages of fast stopping, strong braking force and no braking equipment. However, when braking with high current, the impact force is also large, which makes the motor overheat easily or damage the transmission parts.