The stator and rotor in the motor are not in contact, but why does the rotor rotate when the stator winding of the AC induction motor is fed with AC?Its working principle applies to two major electromagnetic laws: Faraday's Law and Lenz's Law. Today, we will understand the working principle of three-phase asynchronous motors with Senli Motor Xiaobian.
Ac motorThe working principle is that the energized winding rotates in a rotating magnetic field. When the winding on the stator is connected with alternating current, the stator winding will produce a rotating electromagnetic field due to the characteristics of alternating current.
Ac induction motorThe winding on the rotor is a closed-loop conductor, which is in the rotating magnetic field of the stator and is equivalent to constantly cutting the stator's magnetic induction line. According to Faraday's law, when a part of a closed conductor cuts a magnetic induction line in a magnetic field, a current will be generated in the conductor, and this current will form an electromagnetic field.
So, inThree-phase asynchronous motorThere are two electromagnetic fields: one is the stator electromagnetic field generated by connecting the external alternating current, and the other is the rotor electromagnetic field formed by cutting the stator electromagnetic induction line and generating current.
According to Lenz's law, the magnetic field of the induced current always resists the cause of the induced current, that is, the rotor winding cuts the magnetic induction line of the stator electromagnetic field, that is, tries to make the conductor on the rotor no longer cut the magnetic induction line of the stator magnetic field, and the result is: The conductors on the rotor will "chase" the stator's rotating electromagnetic field, that is, make the rotor rotate with the stator's rotating electromagnetic field, and finally make the motor start to rotate.
Three-phase asynchronous motor manufacturers, Senli Motor,19Focus on the development and production of electric motors. 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.