Gi?i m?i (bao g?m t?t c? gi?i nào có s? thay ??i, c?p nh?t m?i ho?c ?i?u ch?nh)Harmonics are periodic distortions of voltage, current, or electrical power sine waves. Harmonics in electricity distribution systems are frequently a result of non-linear loads including switched manner dc ability materials and adjustable speed motor drives... Trong