Question
Download Solution PDFA 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.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFDC 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):
\(V_{o(avg)}=V_o\times ({T_{on}\over T})\)
\(V_{o(avg)}=V_o\times D\)
where, D is the duty cycle
Calculation
Source voltage (Vs) = 220 V
Vch = 2 V
When the chopper is in an ON state:
\(V_o=V_s-V_{ch}\)
\(V_o=220-2\)
\(V_o=218\space V\)
When the chopper is in an OFF state:
Vo = 0V
The waveform is given below:
The average value of output voltage is:
\(V_{o(avg)}=218\times {0.5T\over T}\)
\(V_{o(avg)}=109\space V\)
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