![]() ![]() Induction motor is an AC motor, the load speed and the frequency of the grid connected to the frequency ratio is not constant. ![]() The main motor to do, generally do not do the generator! When the motor shaft is loaded with mechanical load, the mechanical energy is output to the outside.Īdvantages: simple structure, easy manufacture, low price and convenient operation.ĭisadvantages: power factor lag, light load power factor is low, speed performance somewhat less. ![]() (3) According to the law of electromagnetic force, the current-carrying rotor conductor is subjected to electromagnetic force in the magnetic field to form electromagnetic torque to drive the rotor to rotate. According to the principle of electromagnetic induction, the rotor conductor generates induced electromotive force and generates induced current. (2) The rotating magnetic field has relative cutting motion with the rotor conductor. Ns is the magnetic field speed, n is the rotor speed.įundamentals: (1) When a three-phase asynchronous motor is connected to a three-phase AC power supply, a three-phase magnetomotive force (stator rotational magnetomotive force) generated by a three-phase stator winding flows through three-phase stator windings and generates a rotating magnetic field. It is basically the same as induction motor. Motor speed (stator speed) is less than the rotating magnetic field speed, which is called an asynchronous motor. Synchronous motors require fixed poles (permanent magnets or electromagnetic) of the rotor, such as alternators and synchronous AC motors. Asynchronous motors have a simple structure and are widely used. If the rotating speed of the rotor is exactly the same as the rotating magnetic field, the synchronous motor is the rotating speed of the rotor Speed, that is to say, the two are asynchronous, are asynchronous motors. Under the action of a rotating magnetic field, the rotor rotates with a rotating magnetic field. When the three-phase alternating current passes through the winding of a certain structure, a rotating magnetic field is generated. Motor, most of the asynchronous machine generators are synchronous machine.ĭifference between synchronous motor and asynchronous motor The synchronous motor rotor itself generates a fixed direction of the magnetic field (with permanent magnets or DC current generated), the stator rotating magnetic field “dragged” rotor magnetic field (rotor) rotation, so the rotor speed equal to the synchronous speed, and therefore called synchronous motor. Therefore, the rotor speed must be less than the synchronous speed (without this difference Value, that is, slip, there is no rotor induced current), also called induction motor. The working principle of induction motor (induction motor) is to generate induced current in the rotor through the rotating magnetic field of the stator to generate electromagnetic torque, and the rotor does not directly generate magnetic field. ![]()
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