Synkronimoottorin

Synkronimoottori is a type of AC electric motor where the rotor speed is in perfect synchronism with the rotating magnetic field of the stator. This means that the rotor completes one rotation for every cycle of the supplied AC frequency, hence the name. Unlike induction motors, which rely on slip to generate torque, synkronimoottori have a rotor that turns at a constant speed, dictated by the frequency of the power supply and the number of poles in the motor.

The stator of a synkronimoottori is similar to that of an induction motor, typically containing windings that, when energized by a three-phase AC supply, create a rotating magnetic field. The rotor, however, is either a permanent magnet or an electromagnet. In the case of an electromagnet, a DC current is supplied to rotor windings, creating a fixed magnetic field. This rotor field then locks onto the rotating stator field, forcing the rotor to rotate at the same speed.

Synkronimoottori are known for their high efficiency and ability to operate at a constant speed regardless of load variations, within their torque limits. They also have the advantage of being able to operate at leading or unity power factor, which can improve the overall power factor of an electrical system. This makes them suitable for applications requiring precise speed control, such as in industrial machinery, clocks, and record players. They are often used in large-scale applications where efficiency and power factor correction are critical.