In the operation of three-phase asynchronous motor, if there is a phase deficiency phenomenon, the stator will not produce a rotating magnetic field, but a following magnetic field, that is, the stator's magnetic field follows the rotor and rotates. Today, Senli Motor Xiaobian will take you to understand why a power cord cannot be started after power failure.

       So what does it mean to follow a magnetic field? We plug three-phase AC into the stator winding of the motor, and the stator coil will generate a rotating magnetic field, and the motor will follow the rotating magnetic field, ifThree-phase asynchronous motorThe speed of the rotating magnetic field is consistent with the speed of the rotating magnetic field, then the rotor will not cut the magnetic inductance line movement, there will be no rotating force, so the speed of the rotational speed will be lower than the rotating magnetic field of the stator.

       Due to the resistance torque of the rotor given by the load, the rotor speed is slower and slower, and the stator rotating magnetic field is slower and slower. When the rotor stops running, the stator generates a magnetic field that makes the rotor oscillate back and forth in place. As the current of the motor increases, the stator winding is easy to burn out in a short time.

       For some of the load is smallThree-phase asynchronous motorThe lack of a phase power supply, it may continue to rotate, at this time equivalent to a single-phase motor, but the heat will be abnormal, can not be used normally. Therefore, after the motor has a lack of phase, we need to protect the real time to avoid the motor being burned.

       The above content is composed ofThree-phase asynchronous motor manufacturers, provided by Senli Motor; Available if needed1688Search factory name "Shengzhou Chaoli Electric Appliance Factory" , Or online consultation message, we will have business personnel to get in touch with you, you can also contact us directly0575-8378-1127.