This weekly report provides information about calculating ripple voltage from a full-wave bridge rectifier. It discusses the output voltage waveform with and without a smoothing capacitor, defines ripple voltage as the variation in output voltage due to the load resistance and capacitor size, and provides a formula to calculate ripple voltage based on those factors. The report also notes that the formula is an approximation that becomes less accurate if ripple voltage exceeds 10% and outlines next steps which include an engineering team presentation of knowledge sharing.

1. [INC 281 MULTIDISCIPLINARY WORKSHOP WEEKLY REPORT]] March 28, 2012
Name-Surname JaturapatPakkawanit
Student ID. 53211804
Group Name Bork-Korn-Thai
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Weekly Progress
Calculating Ripple Voltage (Vripple)
The output from a fullwave bridge rectifier looks like this:
If we add a smoothing capacitor the capacitor charges up to the
peak value of voltageand the output stays steady at this value …
until you connect a load to the powersupply (RL). Now the output
will look like this:
As the output voltage from the bridge drops the capacitor discharges
through the loadand so a ripple voltage, Vripple, appears on the
output from the supply.The size of this voltage depends on the load
resistance, RL, the size of the smoothingcapacitor, C, and the peak
value of the output voltage, Vp, and is given by:
where is the time between successive peaks of the output waveform from therectifier circuit. This will
be 10ms if the ac frequency is 50Hz and a fullwavebridgerectifier circuit is
used. (But 20ms if a halfwaverectifier circuit is used; the questioncould
specify a different supply frequency, eg 60Hz, which would also affect .)
This formula is an approximation and assumes that the ripple voltage is small. If the
ripple voltage exceeds ~10% this formula becomes increasingly inaccurate.
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