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Polyphase AC is a system for generating and transmitting alternating current (AC) electricity using multiple phases. Instead of a single alternating voltage, polyphase systems employ two or more AC voltages that are offset in time, or phase, from each other. The most common polyphase system is three-phase AC, which uses three voltages that are 120 degrees apart. Other systems, such as two-phase, exist but are less prevalent.
The primary advantage of polyphase systems over single-phase AC is their efficiency in power generation and
Polyphase power is particularly well-suited for driving electric motors. Polyphase induction motors, a common type, are