There are several methods for alternating current motor

There are several methods for alternating current motor

There are two ways of alternating current motor: 1, power brake, reverse connect braking - will the three-phase power supply cord of the motor exchange of two lines, make access to the motor phase sequence, on the other hand, a rotating magnetic field inversion (in contrast to the rotor turning), the electromagnetic torque is a braking torque, motor soon stopped, must stop the motor when power off, otherwise the motor start to reverse. 2, reverse connect braking pull - motor work normally, the load torque pulling reverse rotation, at this time of the electromagnetic torque is a braking torque, the braking torque motor reverse speed is not fast, but they will not stop the motor

The reverse (electrical) brake only has one, which is a sequence of the reverse of the motor. Specific practices; Use magnetic switch, ac contactor, digital time relay to complete. When stop, press the stop button, when the primary loop stops using auxiliary normally closed contacts through time relay, the contactor, motor reversal at this time, according to the size of the motor, its transfer from is lost power and reverse power reverse torque 迏 to immediately stop this time, set the time relay, usually 1-3 s.

Other answer Ac asynchronous motor reverse connect braking has two forms: 1) the power brake, reverse connect braking - the electric motor of the three-phase power exchange of two lines, make access to the motor phase sequence, on the other hand, a rotating magnetic field inversion (in contrast to the rotor turning), the electromagnetic torque is a braking torque, motor soon stopped, must stop the motor when power off, otherwise will reverse starting; 2) pour la reverse connect braking - motor work normally when the load torque pulling reverse rotation, at this time of the electromagnetic torque is a braking torque, the braking torque motor reverse speed is not fast, but will not stop the motor;