Harmonics are periodic distortions of voltage, latest, or electric power sine waves. Harmonics in electric power distribution techniques in many cases are caused by non-linear hundreds for example switched method dc ability materials and adjustable pace motor drives.Cu?i cùng tr??ng h?p vé c?a b?n cho bi?t khi dò k?t qu? x? s? trùng v?i nhi?u g