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The output of a 50 Hz inverter is pulse-width-modulated by a triangular wave of frequency 500 Hz. Calculate the harmonic content of the wave when the reference wave is set to a) Its maximum value Fig. Q2a and the angle of switching is 28°, 509, 57° and 90°. b) One half of its maximum value Fig. Q2b and the angle of switching is 31°, 42°, 64º and 810 0.5 0 -0.5 - 1 0 Att 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 Fig. Q2a Pulse width modulation 0.5 0 -0.5 0 0.002 0.004 0.006 0.008 0.01 0.012 0.014 0.016 0.018 0.02 Fig. Q2b Pulse width modulation