A DC chopper has a resistive load of R = 10 Ω and an input voltage of Vs = 220 V. When the chopper switch remains in the ON state, its voltage drop is Vch = 2 V. If the duty cycle is 50%, determine its average output voltage Vo.

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MPPKVVCL Indore JE Electrical 21 August 2018 Official Paper
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  1. 111 V
  2. 110 V
  3. 109 V
  4. 108 V

Answer (Detailed Solution Below)

Option 3 : 109 V
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Detailed Solution

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DC chopper

It is a power electronics device that is used to convert pure DC into pulsating DC.

The average value of output voltage (pulsating value):

where, D is the duty cycle

Calculation

Source voltage (Vs) = 220 V

Vch = 2 V

When the chopper is in an ON state:

When the chopper is in an OFF state:

Vo = 0V

The waveform is given below:

The average value of output voltage is:

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