Harmonics are periodic distortions of voltage, existing, or ability sine waves. Harmonics in electrical power distribution devices will often be brought on by non-linear hundreds for instance switched method dc ability materials and adjustable pace motor drives.?óng T?p chí tri th?c tr?c tuy?n Xu?t b?n Tác gi? Kinh doanh Công ngh? S?c kh?e ??i