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Three-phase Power
Sep 26, 2018


        In detail, everyone knows that when the coil rotates in a magnetic field, the wire cutting magnetic field line will generate an induced electromotive force, and its variation law can be expressed by a sinusoidal curve. Suppose that each of the three coils is at an angle of 120 degrees in the local orientation. The three coils still rotate at the same speed in the magnetic field, and will induce three induced electromotive forces of the same frequency. Because the three coils are at an angle of 120 degrees from the local azimuth, the resulting current is also a three-phase sinusoidal change called a three-phase sinusoidal alternating current.