A single phase full bridge bipolar inverter with RL load as shown in Figure 2, has...

 

Transcribed Image Text:

A single phase full bridge bipolar inverter with RL load as shown in Figure 2, has the following parameters (i) (ii) (iii) Input de voltage = 96 Volts R= 32 Q2 L= 24 mH Fundamental output voltage frequency= 60 Hz Explain the operation of the inverter and sketch the input and output voltages. Determine the amplitude modulation ratio to provide a 54 V rms fundamental frequency output. Determine the total harmonic distortion of the load current for a frequency modulation ratio of 17. Table 1. Normalized Fourier Coefficients Vn/Vdc for Bipolar PWM m-1 1.00 0.9 0.8 0.7 0.6 0.90 0.80 0.70 0.60 0.71 0.82 0.92 1.01 0.27 0.22 0.17 0.13 n = 1 n=mf n=m₂ ±2 0.60 0.32 Va T₁ DA D 0.5 0.4 0.3 0.2 0.1 0.30 0.20 0.10 0.50 0.40 1.08 1.15 1.20 1.24 1.27 0.09 0.06 0.03 0.02 0.00 R wwm L D T₂ D.A Figure 2. single phase full bridge inverter A single phase full bridge bipolar inverter with RL load as shown in Figure 2, has the following parameters (i) (ii) (iii) Input de voltage = 96 Volts R= 32 Q2 L= 24 mH Fundamental output voltage frequency= 60 Hz Explain the operation of the inverter and sketch the input and output voltages. Determine the amplitude modulation ratio to provide a 54 V rms fundamental frequency output. Determine the total harmonic distortion of the load current for a frequency modulation ratio of 17. Table 1. Normalized Fourier Coefficients Vn/Vdc for Bipolar PWM m-1 1.00 0.9 0.8 0.7 0.6 0.90 0.80 0.70 0.60 0.71 0.82 0.92 1.01 0.27 0.22 0.17 0.13 n = 1 n=mf n=m₂ ±2 0.60 0.32 Va T₁ DA D 0.5 0.4 0.3 0.2 0.1 0.30 0.20 0.10 0.50 0.40 1.08 1.15 1.20 1.24 1.27 0.09 0.06 0.03 0.02 0.00 R wwm L D T₂ D.A Figure 2. single phase full bridge inverter