polifase

Polifase refers to a type of electrical power system that utilizes multiple alternating current phases. This is in contrast to a single-phase system, which has only one alternating current waveform. The most common polifase system is three-phase, which uses three separate alternating currents that are offset in phase by 120 degrees. This arrangement provides a more consistent and efficient power delivery than single-phase systems, especially for industrial and heavy-duty applications.

The advantages of polifase power include higher power density, meaning more power can be transmitted over the same size conductors compared to single-phase. It also allows for simpler and more efficient motors, as three-phase motors are inherently self-starting and operate more smoothly. Furthermore, the power delivery from a three-phase system is more constant, resulting in less vibration and a more stable operation for connected equipment.

Polifase systems are widely used in power generation, transmission, and distribution networks. They are essential for running large machinery in factories, powering commercial buildings, and even for some residential applications requiring high power demands. The generation of polifase power typically involves alternators with multiple sets of windings, producing the staggered waveforms. The efficiency and power capabilities of polifase systems make them the standard for modern electrical infrastructure.