当在一台三相异步电动机的定于绕组上加上三相交流电压时， 该电压将产生一

When a three-phase asynchronous voltage is applied to the winding of a three-phase asynchronous motor, the voltage will generate a rotating magnetic field, the speed of which is determined by the frequency of the stator voltage. When the magnetic field rotates, the rotor winding located in the magnetic field will cut the magnetic lines of force and generate corresponding induced electromotive force and induced current in the rotor winding, and this induced current will be affected by the rotating magnetic field to generate electromagnetic force, namely torque Rotate the rotor following the rotating magnetic field. When any two phases of the three-phase asynchronous motor winding are exchanged, the direction of the generated rotating magnetic field will change. Therefore, the steering of the motor will also change. According to the speed formula, it can be known to change the frequency of the power supply to realize the speed control of the asynchronous motor.

When a three-phase asynchronous motor is added to a three-phase asynchronous motor's scheduled winding, the voltage produces a rotating magnetic field whose velocity is determined by the frequency of the stator voltage. When the magnetic field rotates, the rotor winding in the magnetic field will cut the magnetic line and generate the corresponding induced electric potential and induction current in the rotor winding, which in turn will be affected by the action of the rotating magnetic field and produce electromagnetic force, i.e. torque, so that the rotor follows the rotation of the magnetic field. When any two phases of a three-phase asynchronous electrical lymlastis are exchanged, the direction of the resulting rotating magnetic field changes. As a result, the steering of the motor will also change. According to the speed formula, you can know how often the power supply is changed to control the speed of the asynchronous motor.

When a three-phase AC voltage is applied to the fixed winding of a three-phase asynchronous motor, the voltage will produce a rotating magnetic field whose speed is determined by the frequency of the stator voltage. When the magnetic field rotates, the rotor winding in the magnetic field will cut the magnetic field line, and generate the corresponding induced electromotive force and induced current in the rotor winding, and the induced current will be affected by the rotating magnetic field and generate electromagnetic force, that is, torque, so that the rotor rotates with the rotating magnetic field. When any two phases of three-phase asynchronous motor windings are exchanged, the direction of the generated rotating magnetic field will change. Therefore, the direction of rotation of the motor will also change. According to the speed formula, we can know how to change the frequency of the power supply to realize the speed control of the asynchronous motor.<br>