Induction motor - definition

The induction motor, also known as an asynchronous motor, is the most widely used type of electric motor alternating current (AC), in which torque is generated by the phenomenon of electromagnetic induction between the stator and the rotor. The principle of operation is based on the fact that the alternating magnetic field generated by the stator windings induces current in the conductors of the rotor, which in turn generates its own magnetic field that interacts with the stator field, causing the rotor to rotate.

A characteristic feature of the induction motor is that there is no direct electrical connection between the power supply and the rotor, which simplifies the design and increases reliability. The rotor, depending on the type of design, can be made in the form of a so-called cage (squirrel-cage induction motor) or have windings, as in the case of ring motors. In both cases, torque occurs due to the difference in speed between the magnetic field rotating in the stator and the actual speed of the rotor - hence the origin of the term 'asynchronous'.

Induction motors are most commonly found in three-phase versions, due to their better starting characteristics and higher energy efficiency, although single-phase versions are also available, mainly used in household and simple mechanical appliances. Speed control is possible by varying the frequency of the power supply, which in practice is achieved by means of frequency converters (inverters).

Thanks to their simple design, durability, low operating costs and high efficiency, induction motors are the primary source of drive in industry, especially in pump systems, fans, compressors, conveyor belts and many other mechanical devices. Today's Automation systems use them in combination with modern control systems, allowing precise and energy-efficient management of technological processes.

[Asynchronous motors](/ca/en https://www.tme.eu/pl/katalog/silniki-elektryczne_100611/?params=1885:1454931;1886:1499856_typ-silnika:ac;rodzaj-silnika:synchroniczny){.cs-btn-primary}

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