Harmonics are periodic distortions of voltage, present-day, or energy sine waves. Harmonics in energy distribution devices are frequently a result of non-linear masses such as switched manner dc ability supplies and adjustable speed motor drives.B?n quy?n thu?c v? Công ty TNHH BHNT Prudential Vi?t Nam. T?t c? các quy?n ???c b?o h?.B?i các bài t