Harmonics are periodic distortions of voltage, current, or electrical power sine waves. Harmonics in energy distribution techniques are sometimes brought on by non-linear loads including switched mode dc power supplies and adjustable speed motor drives.Cài ??t tài kho?n Tin ?ã l?u Bình lu?n c?a b?n L?ch s? giao d?ch Dành cho b?n Vào Tu?i Tr?