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The working principle of three-phase induction motor

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The working principle of three-phase induction motor

  • Categories:Industry News
  • Author:
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  • Time of issue:2021-10-29
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(Summary description)Three-phase induction motor is a type of induction motor. It is a type of motor powered by 380V three-phase AC current (phase difference 120 degrees) at the same time.

The working principle of three-phase induction motor

(Summary description)Three-phase induction motor is a type of induction motor. It is a type of motor powered by 380V three-phase AC current (phase difference 120 degrees) at the same time.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-10-29
  • Views:0
Information

Three-phase induction motor is a type of induction motor. It is a type of motor powered by 380V three-phase AC current (phase difference 120 degrees) at the same time. Because the rotor and stator of the Three-phase induction motor rotate in the same direction , Rotating at different speeds, there is a slip rate, so it is called Three-phase induction motor. The rotor speed of the three-phase induction motor is lower than the speed of the rotating magnetic field. The rotor winding generates electromotive force and current due to the relative movement between the rotor and the magnetic field, and interacts with the magnetic field to generate electromagnetic torque to realize energy conversion.

good price and quality Three-phase induction motor factory
Compared with single-phase asynchronous motors, Three-phase induction motors have better running performance and can save various materials. According to the different rotor structure, Three-phase induction motor can be divided into two types: cage type and winding type. The cage rotor asynchronous motor has simple structure, reliable operation, light weight and low price, and has been widely used. Its main disadvantage is the difficulty of speed regulation. The rotor of the winding type Three-phase induction motor is also equipped with three-phase windings like the stator and connected to an external varistor through slip rings and brushes. Adjusting the resistance of the rheostat can improve the starting performance of the motor and adjust the speed of the motor.
Three-phase induction motor working principle:
When the three-phase induction motor's three-phase stator windings (each with a 120-degree electrical angle difference) are connected to three-phase symmetrical alternating current, a rotating magnetic field will be generated. The rotating magnetic field cuts the rotor winding, thereby generating an induced current in the rotor winding ( The rotor winding is a closed path), the current-carrying rotor conductor will generate electromagnetic force under the action of the stator rotating magnetic field, thereby forming an electromagnetic torque on the motor shaft to drive the motor to rotate, and the direction of the motor rotation is the same as the direction of the rotating magnetic field.

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