1-The dc source supplying an inverter with a bipolar PWM output is 96 V. The load is an RL series combination with R = 32 and L = 24 mH. The output has a fundamental frequency of 60 Hz. (a) Speci the amplitude modulation ratio to provide a 54-V rms fundamental frequency output. (b) If the frequency modulation ratio is 17, determine the total harmonic distortion of the load current.
1-The dc source supplying an inverter with a bipolar PWM output is 96 V. The load is an RL series combination with R = 32 and L = 24 mH. The output has a fundamental frequency of 60 Hz. (a) Speci the amplitude modulation ratio to provide a 54-V rms fundamental frequency output. (b) If the frequency modulation ratio is 17, determine the total harmonic distortion of the load current.
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Transcribed Image Text:1-The dc source supplying an inverter with a bipolar PWM output is 96 V. The load is an RL series
combination with R = 32 and L = 24 mH. The output has a fundamental frequency of 60 Hz. (a) Specify
the amplitude modulation ratio to provide a 54-V rms fundamental frequency output. (b) If the
frequency modulation ratio is 17, determine the total harmonic distortion of the load current.
2-A six-step three-phase inverter has a 250-V dc source and an output frequency of 60 Hz. A balanced Y-
connected load consists of a series 25- resistance and 20-mH inductance in each phase. Determine (a)
the rms value of the 60-Hz component of load current and (b) the THD of the load current.
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