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In current source inverters (CSIs), the output voltage’s
  • a)
    amplitude depends upon the load impedance
  • b)
    waveform depends upon the load impedance
  • c)
    amplitude as well as the nature of the waveform depends on the load
  • d)
    both amplitude and waveform are independent of the load impedance
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
In current source inverters (CSIs), the output voltage’sa)amplit...
In CSIs, the amplitude of the output current is independent on the load impedance, as the input current (to the CSI) is kept constant. However, the magnitude of output voltage and its waveform depends upon the nature of the load impedance.
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In current source inverters (CSIs), the output voltage’sa)amplit...
Is controlled by adjusting the modulation index of the switching signals. The modulation index represents the ratio of the amplitude of the modulating signal to the amplitude of the carrier signal. By varying the modulation index, the output voltage of the inverter can be adjusted.

CSIs use a high-frequency carrier signal to switch the power devices (such as transistors or thyristors) in the inverter. The carrier signal is usually a sinusoidal waveform with a fixed frequency. By modulating this carrier signal with a low-frequency sinusoidal waveform, the output voltage of the inverter can be controlled.

When the modulation index is increased, the amplitude of the modulating signal is increased relative to the carrier signal. This leads to a higher peak value of the output voltage waveform. Conversely, when the modulation index is decreased, the output voltage waveform has a lower peak value.

The modulation index also affects the harmonic content of the output voltage waveform. Higher modulation indices result in more harmonics, while lower modulation indices result in fewer harmonics. This is because the modulation process introduces additional frequency components to the output waveform.

Overall, the modulation index in CSIs plays a crucial role in controlling the output voltage magnitude and harmonic content. It allows for precise control of the output voltage, making CSIs widely used in applications such as motor drives, renewable energy systems, and power grid interfaces.
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In current source inverters (CSIs), the output voltage’sa)amplitude depends upon the load impedanceb)waveform depends upon the load impedancec)amplitude as well as the nature of the waveform depends on the loadd)both amplitude and waveform are independent of the load impedanceCorrect answer is option 'C'. Can you explain this answer?
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