Example: An SPWM controlled three-phase inverter is supplied from a three-phase diode full-bridge rectifier. The rectifier is connected to a 400V-50HZ AC line. Neglect the ripple of the rectifier output voltage. The frequency modulation index, m-36. Answer the following. a. What is the line fundamental voltage when, m3D0.8? b. With m=0.8 determine the duty ratios of the three switching variables for during the 16th switching interval. c. What is maximum phase voltage (VLN.1.MAX) ? d. What is the order of the dominant harmonics? e. Assuming (0.1

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Example: An SPWM controlled three-phase inverter is supplied from a three-phase diode full-bridge rectifier. The rectifier is connected to a 400V-50HZ AC line.
Neglect the ripple of the rectifier output voltage. The frequency modulation index, m-36.
Answer the following.
a. What is the line fundamental voltage when, m3D0.8?
b. With m=0.8 determine the duty ratios of the three switching variables for during the 16th switching interval.
c. What is maximum phase voltage (VLN.1.MAX) ?
d. What is the order of the dominant harmonics?
e. Assuming (0.1<m<0.9) and an maximum f,=100HZ, determine the minimum pulse and notch duration of the switching function.
Transcribed Image Text:Example: An SPWM controlled three-phase inverter is supplied from a three-phase diode full-bridge rectifier. The rectifier is connected to a 400V-50HZ AC line. Neglect the ripple of the rectifier output voltage. The frequency modulation index, m-36. Answer the following. a. What is the line fundamental voltage when, m3D0.8? b. With m=0.8 determine the duty ratios of the three switching variables for during the 16th switching interval. c. What is maximum phase voltage (VLN.1.MAX) ? d. What is the order of the dominant harmonics? e. Assuming (0.1<m<0.9) and an maximum f,=100HZ, determine the minimum pulse and notch duration of the switching function.
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