Publish Time: 2022-10-27 Origin: Site
According to the number of current phases, it is divided into: single-phase AC motor and three-phase AC motor. According to the motor structure and working principle, it is divided into: synchronous motor and asynchronous motor. The difference between synchronous motor and asynchronous motor in design: The biggest difference between synchronous and asynchronous is whether their rotor speed is consistent with the magnetic field speed of stator rotation. If the rotational speed of the rotor is the same as the rotational speed of the stator, it is called a synchronous motor. If they are not consistent, it is called an asynchronous motor.
Here is the list
What is the use of Three-phase asynchronous AC motor?
What are the Characteristics of three-phase asynchronous AC motors?
What is the working principle of AC motor?
1) AC asynchronous motor structure
AC asynchronous motor is a type of motor widely used in industry. Its characteristics are: the stator and the rotor are made of laminated silicon steel sheets, and the two ends are sealed with aluminum covers; there are no mechanical parts in contact with each other between the stator and the rotor.
What are the Characteristics of three-phase asynchronous AC motors?
Advantages: simple structure, reliable and durable operation, convenient maintenance. Compared with the DC motor of the same power, the AC asynchronous motor is more efficient and the weight is about one-half lighter. Suitable for high speed operation.
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Pros: Cooling is relatively easy. Because this type of motor does not need to install brushes and mechanical commutation structure, no commutation sparks will be generated during operation, the operation is safe and reliable, and the maintenance is convenient. High energy efficiency.
working principle
When the three-phase symmetrical current passes through the stator, a rotating magnetic field with constant amplitude will be generated in the stator, and its speed depends on the frequency of the three-phase symmetrical current. The rotating magnetic field interacts with the magnetic field of the rotor permanent magnets to generate electromagnetic torque. When turning as a starter, the power electronics box PEB needs to know the position, angle and rotational speed of the rotor. This task is done by the parser. The PEB controls the rotation direction of the rotor by controlling the AC sequence of the three-phase windings, and precisely controls the torque and speed of the driver through PWM mode and the frequency of the AC signal. The polarity and magnetic field strength of the stator coils are constantly changing. The rotation of the permanent magnet rotor is caused by the attraction and repulsion of the stator coils. The classification, principle and application of AC motors are introduced.
Hangzhou New Hengli Electric Machine MFG. Co., Ltd.works has been named the provincial advanced enterprise by Zhejiang provincial government and become a state grade-2 enterprise in 1988. Our motor max-power reaches 15000kW (A.C. motor), 2800kW (D.C. motor), and max-center-high dimension of our motor reaches 1250mm.