An induction motor, also known as an "asynchronous motor", is a device that places a rotor in a rotating magnetic field and obtains a rotational moment under the action of a rotating magnetic field, thereby rotating the rotor. The rotor is a rotatable conductor, usually in the form of a squirrel cage. Invented in 1887 by electrical engineer Nikola Tesla. The entry introduces the concept, inventor, working principle, basic structure, working mode, braking method, asynchronous characteristics, specifications and fault checking of the induction motor.
Asynchronous motor, also known as induction motor, is an AC motor that converts electromechanical energy into mechanical energy by the interaction of the air gap rotating magnetic field and the rotor winding induced current to generate electromagnetic torque. The three-phase asynchronous motor is mainly used as an electric motor to drive various production machines, such as fans, pumps, compressors, machine tools, light industry and mining machinery, threshers and pulverizers in agricultural production, processing machinery in agricultural and sideline products, etc. Wait. The structure is simple, easy to manufacture, low in price, reliable in operation, durable, high in operating efficiency and suitable for operating characteristics.
The terms "asynchronous motor" and "induction motor" are very common in motor professional textbooks and are often used interchangeably. So is there any difference between these two words?
1, the sea
Cihai contains the "asynchronous motor" entry (link), which is interpreted as:
Asynchronous motors, also known as "induction motors." An alternating current motor that utilizes an air gap rotating magnetic field between a stator and a rotor to interact with an induced current of a rotor winding. The rotor speed is lower than the synchronous speed of the rotating magnetic field. About 90% of the electric drive machinery is driven by it.
It can be seen that Cihai believes that the terms "asynchronous motor" and "induction motor" are equivalent.
2, Wikipedia
The difference between asynchronous and induction motors is given in the Wikipedia "Asynchronous Motors" entry (link):
An asynchronous motor is an alternating current motor whose ratio of the speed of the load to the frequency of the connected grid is not constant. 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 mean both concepts.
According to Wikipedia, "induction motors" are just a subclass of "asynchronous motors."
3, textbook conventions
In Chen Bo's textbook "Electric Power Drag Automatic Control System", Mr. Chen Lao clearly stated in the book (4th edition, p. 113):
AC motors have two types of asynchronous motors (ie induction motors) and synchronous motors...
In the opening chapter of Mr. Qi Chenglin’s "Electrical Science" Asynchronous Motors chapter, the author proposes
Asynchronous motor is an AC motor, also called induction motor, mainly used as motor.
It can be seen that both Chen Boshi and Qi Chenglin believe that asynchronous motors and induction motors are one thing.
4. Chinese literature
In the network, I searched for themes "asynchronous motor" and "winding" at the same time, with 381 results. At the same time searching for "induction motor" and "winding", there were 85 results. At the same time, search for "asynchronous motor" and "squirrel cage". There are 495 results. At the same time, there are 133 results for "Induction Motor" and "Squirrel Cage". At the same time, "Induction Motor" and "Double-Feed" are searched for 419 results. At the same time, "Asynchronous Motor" and "Double" are searched. Feeding, there are 305 results. The search results show that researchers do not have a clear preference when using these two words.
summary
For squirrel-cage asynchronous motors and squirrel-cage induction motors, the above statements are the same; for wound-wound asynchronous motors, voltage (dual-feed) can be applied to the rotor circuit, according to Wikipedia's explanation. It should not be called an induction motor. But in fact, from the search results of the Chinese literature keywords, it can be seen that the doubly-fed induction motor is even more widely said than the doubly-fed induction motor. It can be seen that in the Chinese context, the induction motor and the asynchronous motor are completely equivalent.
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