In three phase full bridge inverter as shown in Fig. 5, the de voltage Va = 290 V, the amplitude index modulation index

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In Three Phase Full Bridge Inverter As Shown In Fig 5 The De Voltage Va 290 V The Amplitude Index Modulation Index 1 (176.55 KiB) Viewed 19 times

In three phase full bridge inverter as shown in Fig. 5, the de voltage Va = 290 V, the amplitude index modulation index ma = 0.8, the frequency modulation index me = 27, and the frequency of the three-phase sinusoidal modulating wave is 40Hz. The load is three-phase Y-connected RL load, the resistance is 100 and the inductance is 10mH. Answer the following questions: (a) Determine the line-to-line voltage and line current at fundamental frequency. (10 points) (6) Calculate the rms values of line-to-line voltage of dominant harmonics, mp+2. (5 points) 7 x =+ ***K* **K + ܂ R 2 V mm w 2 ******* If the load neutral n is connected to ground node 0 as shown in Fig. 6, answer the following questions when the gating signals remain the same in questions (a) and (b): (c) Determine the line-to-line voltage at fundamental frequency. (5 points) Hint: the converter can be treated as three three-phase half-bridge converter. (d) Calculate the rms values of line-to-line voltage of dominant harmonics, mf, mp+2. (5 points) V KIKOKO 82K d 11 be w CV ke m2 Table 8-1 Generalized Harmonies of ra for a largem m. h 0.2 0.4 0.6 0.8 1.0 1 0.2 0.4 0.6 0.8 1.0 Fundamental my 1.242 1.15 1.006 0.818 0.601 0.016 0.061 0.131 0.220 0.318 0.018 0.190 0.326 0.370 0.314 0.181 0.024 0.07! 0.139 0.212 0.013 0.033 3m 0.335 0.123 0.083 0.171 0.113 0.044 0.139 0.203 0.176 0,062 0.012 0.047 0.104 0.157 3,6 0.016 0.044 4m + 1 0.163 0.157 0.008 0.105 0.068 4m, 3 0.012 0.070 0.132 0.115 0.009 Amy + 5 0.034 0.084 0.119 4m + 7 0.017 0.050 Note: (V.V. (V) is tabulated as a function of m. 211 2m, 3 2, +5 12 W4 3m +2 3m + 4 Table 8-2 General Ilarmonies of for a large and Odd an hulsa Multiple of m. h 0.2 0.4 0.6 0.8 1.0 1 0.122 0.245 0.367 0.490) 0.612 0.010 0.037 0.080 0.135 0.195 0.005 0.011 2018, 11 0.116 0.200 0.227 0.192 0.111 0.008 0.020 0.027 0.085 0.124 0.108 0.038 31, +4 0.007 0.029 0.064 0.096 4m, t ! 0.100 0.096 0.005 0.064 0.042 4, +5 0.021 0.051 0.073 4m, 57 0.010 0.030 Note: (V/V, are tabulated as a function of m, where are the mms values of the harmonic voltages. 201, +5 31, 2