Electric Motor Manufacturer - What Is An Asynchronous Motor?

Electric Motor Manufacturer   introduction: Asynchronous motors are divided into two types according to the rotor structure: squirrel-cage type (squirrel-cage asynchronous motor), wound-wound asynchronous motor. Asynchronous motor for motor operation. Because the rotor winding current is induced, it is also called induction motor. Asynchronous motors are the most widely used and most demanding types of motors. About 90% of the electricity-driven machines in various countries are asynchronous motors, of which small asynchronous motors account for more than 70%. In the total load of the power system, the power consumption of the asynchronous motor accounts for a considerable proportion. In China, the use of asynchronous motors accounts for more than 60% of the total load.

An asynchronous motor is an AC motor whose ratio of the speed of the load to the frequency of the connected grid is not constant. An induction motor is an asynchronous motor with only one set of windings connected to the power supply. In the case of no misunderstanding and confusion, the induction motor can generally be called an asynchronous motor. The IEC standard states that the term "induction motor" is used synonymously as "asynchronous motor" in many countries, while other countries use only the term "asynchronous motor" to refer to both concepts.

The speed of the motor (rotor speed) is less than the speed of the rotating magnetic field, so it is called an asynchronous motor. It is basically the same as the induction motor. $\text{s=(n_s-n)/n_s}$. s is the slip rate, $n_s$ is the magnetic field speed, and n is the rotor speed.

There are many types of asynchronous motors, including explosion-proof three-phase asynchronous motors, ys series three-phase asynchronous motors, y, y2 series three-phase asynchronous motors, YVP series variable frequency speed regulating motors, and so on.

After the stator winding of the three-phase asynchronous motor is added with a symmetrical voltage, a rotating air gap magnetic field is generated, and the rotor winding conductor cuts the magnetic field to generate an induced potential. A rotor current is generated due to the short circuit of the rotor windings. The rotor current interacts with the air gap magnetic field to generate electromagnetic torque that drives the rotor to rotate. The speed of the motor must be lower than the synchronous speed of the magnetic field, because only the rotor conductor can induce the potential to generate the rotor current and the electromagnetic torque. Therefore, the motor is called an asynchronous machine, also called an induction motor.

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来源： https://www.cnblogs.com/Aggisxjetl/p/11713150.html