The 3-phase inverter of Fig. 4 has the following parameters: The fundamental fre

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The 3-phase inverter of Fig. 4 has the following parameters: The fundamental frequency of the output voltage f_1 = 60 Hz V_d = 300 V Calculate If the magnitude modulation index m_a = 1.0, find the RMS value of the fundamental frequency line-to-line voltage, V_LL1; If it goes over modulation (i.e., m_a > 1.0), what is the maximum value of V_LL1 that can be possibly achieved ? If the inverter is connected to a 120/208 V utility grid, how to control the inverter for the grid interconnection? Which of following carrier frequency would be a better choice for the inverter 1140 Hz; 1200 Hz, 1260 Hz.

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