multiphase current

The term "multiphase current" refers to alternating currents that are out of phase with one another. In electrical engineering, multiphase systems, also known as polyphase systems, utilize multiple currents that are intentionally offset in their phase angles.1

A two-phase system has two currents with a 90° phase difference, while a three-phase system has currents that differ by 120°. This controlled phase difference is crucial in alternating-current technology for efficient power transmission and operation of various electrical devices. The concept of phase itself relates to the fraction of a period a point completes in its cycle, and when comparing periodic motions like waves or currents, their relative timing is described by their phase difference.1