PEREC Harmonic analysis s There is no dc component and 100 even order harmonics in the curre 80 The current waveform is half- Fundamental wave symmetric 60 +p the higher the number of 40 harmonic ordinate the lower the harmonic content 20 中c=90° is when harmonics is the most severe 060120180 a(°) e the situation for the inductive load is similar to that for the Current harmonics resistive load except that the for the resistive load corresponding harmonic content is lower and is even lower as is Increasing 12Harmonic analysis Harmonic analysis There is no DC component and There is no DC component and even order harmonics in the even order harmonics in the current. current. – The current waveform is half The current waveform is half￾wave symmetric. wave symmetric. The higher the number of The higher the number of harmonic ordinate, the low harmonic ordinate, the low er the harmonic content. harmonic content. α = 90 ° is when harmonic is when harmonic s is the is the most severe. most severe. The situation for the inductive The situation for the inductive load is load is similar to that for the similar to that for the resistive load exce resistive load except tha t the corresponding harmonic content corresponding harmonic content is lower and is even lower as is lower and is even lower as ϕ is increasing. increasing. Power Electron cs i Current harm Current harm onics for the resistive load for the resistive load 0 6 0 120 180 Fundamental 3 5 7 α/( °) In/I* /% 20 40 60 80 100 12