Figure Q1 is a single phase 2-level voltage source converter (VSC) with a total DC voltage V-1000V. A PWM scheme, by comparing a reference value with a 1kHz triangular waveform, is used to control the switches S₁ and S2, and output 340v at Vo. With the aid of graphs explain how pulse signals for the switches are generated, sketch the output voltage Vo, determine the duty cycle and the modulation index.

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Q1. a)
Figure Q1 is a single phase 2-level voltage source converter (VSC) with a
total DC voltage V-1000V. A PWM scheme, by comparing a reference
value with a 1kHz triangular waveform, is used to control the switches S₁
and S2, and output 340v at Vo. With the aid of graphs explain how pulse
signals for the switches are generated, sketch the output voltage Vo,
determine the duty cycle and the modulation index.
Va +
2
it
Va
d
+
TS₁
V
{1+5₂ =
Figure Q1 A single phase VSC
Transcribed Image Text:Q1. a) Figure Q1 is a single phase 2-level voltage source converter (VSC) with a total DC voltage V-1000V. A PWM scheme, by comparing a reference value with a 1kHz triangular waveform, is used to control the switches S₁ and S2, and output 340v at Vo. With the aid of graphs explain how pulse signals for the switches are generated, sketch the output voltage Vo, determine the duty cycle and the modulation index. Va + 2 it Va d + TS₁ V {1+5₂ = Figure Q1 A single phase VSC
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