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Ripple voltage represents the residual periodic variation of the DC voltage within a power supply power pack originating from an alternating current source after complete rectification. In electronics engineering, keeping ripple voltage under strict limits is critical for ensuring stable circuit functionality, protecting sensitive microprocessors, and eliminating unwanted audio hum in amplifier systems.
The peak-to-peak ripple voltage ($V_r$) for a capacitor-filtered full-wave rectifier is calculated using the following engineering formula:
$$V_r = \frac{I_L}{f_{ripple} \times C}$$
Where $I_L$ is the load current, $f_{ripple}$ is twice the input AC line frequency, and $C$ represents the filter capacitance value.
Why is full-wave ripple frequency double the input frequency?
Full-wave rectifiers invert both halves of the AC waveform cycle, producing two pulsation peaks per individual input cycle.
How can I reduce ripple voltage?
You can effectively lower ripple voltage by increasing the filter capacitance or utilizing an active electronic regulator circuit.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.