Harmonics are periodic distortions of voltage, current, or power sine waves. Harmonics in energy distribution techniques are sometimes caused by non-linear loads such as switched mode dc energy materials and adjustable pace 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? Sao Thoát Tu?i