Harmonics are periodic distortions of voltage, current, or electricity sine waves. Harmonics in energy distribution methods are sometimes because of non-linear loads for example switched manner dc electrical power supplies and adjustable speed motor drives.Th?ng kê t? ??ng c?p nh?t khi k?t thúc bu?i t??ng thu?t tr?c ti?p k?t qu? x? s?You'll be ab