T?n su?t c?p Loto T?n su?t Lô r?i T?n su?t gi?i ??c bi?t Th?ng kê chu k? lotoHarmonics are periodic distortions of voltage, latest, or energy sine waves. Harmonics in electrical power distribution methods are often attributable to non-linear hundreds like switched mode dc electricity materials and adjustable velocity motor drives..) b?n l?u ý l?