s?a mã ngu?n]Harmonics are periodic distortions of voltage, current, or electrical power sine waves. Harmonics in electric power distribution programs are often brought on by non-linear loads which include switched manner dc energy materials and adjustable pace motor drives.Giao di?n danh m?c nh?n ??nh ???c thi?t k? c?c k? b?t m?t Bên c?nh ?ó, t