Tag: asynchronous motor

The motor can be turned on "in reverse" and is called an induction motor, also known as an "asynchronous motor". This means that the rotor of the motor is placed in a rotating magnetic field, and under the effect of the rotating field, rotating torque is obtained, and thus the rotor of the motor rotates. The motor rotor is a rotatable electrical conductor, generally mostly in the form of a squirrel cage. The motor stator is the non-rotating part of the motor with the specific task of creating a rotating magnetic field. The rotating magnetic field is not accomplished by mechanical means. It is simply a cyclic transformation of the magnetic poles by passing alternating current through several pairs of electromagnets so that it is equivalent to a rotating magnetic field. Such motors do not have brushes or collector rings like DC motors, and there are single-phase motors and three-phase motors according to the type of AC power commonly used.

Induction motor refers to a motor that relies on electromagnetic induction between the stator and the rotor to induce current in the rotor to realize electromechanical energy conversion. Three-phase asynchronous motors generally have two wiring structures, WYE (Y) and Delta (△). When the Y-type access voltage is 380V, we can change it to △ type 220V.

An induction motor or an asynchronous motor is an AC motor that works on the principle of electromagnetic induction. That is, the rotor obtains torque under the action of the rotating magnetic field generated by the stator, and then the rotor rotates. Since the rotor speed is not the same as the speed of the rotating magnetic field (synchronous speed), the induction motor is also known as asynchronous motor. Induction motors are popular in the industry, since they are simple to build and economical. The following are some essential things you need to consider when buying an induction motor.

Through the relative motion of the rotating magnetic field generated by the stator (its speed is synchronous speed n1) and the rotor winding, the rotor winding cuts the magnetic induction line to generate induction electromotive force, thus induced current is generated in rotor winding. The induction current in the rotor winding acts on the magnetic field to produce electromagnetic torque, thus making the rotor rotate. As the rotor speed approaches the synchronous speed, the induced current decreases and the electromagnetic torque decreases accordingly. When the asynchronous motor works in the motor state, the rotor speed is smaller than the synchronous speed. In order to describe the difference between rotor speed n and synchronous speed n1, slip ratio is introduced.

How does an 3-phase induction motor work? In short, it works based on the principle of electromagnetic induction. When the stator windings are supplied with three-phase alternating current, a rotating magnetic field is generated between the stator and the rotor. The rotating magnetic field cuts the rotor windings to generate induced electromotive force and current in the rotor circuit. The current in the rotor conductor forces the rotor to rotate under the effect of the rotating magnetic field. Below, let’s specifically analyze the generation of rotating magnetic field, its direction and speed as well as slip.

Induction motor, also known as asynchronous motor, is a kind of AC electric motor. According to the different power phase, it can be divided into single-phase and three-phase. The main construction of induction motor is composed of two parts - stator and rotor. In addition, there are end bells, bearings, motor frame and other components. The following will give more details about the structure of three-phase induction motor or asynchronous motor.