Determine the output voltage ripple

In summary, the conversation is discussing how to find the ripple voltage from a given data and the challenges of measuring it accurately on a digital scope. Tips are given on how to zoom in on the ripple and adjust the scope settings to block DC but allow AC.
  • #1
ToonBlue
26
0

Homework Statement


upload_2015-9-8_22-53-22.png


Homework Equations

The Attempt at a Solution


This is my load voltage output from my digital scope.
From the digital scope , my output voltage is 25.0007V but how do I find the ripple voltage from the given data?
 
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  • #2
Yikes! That's a heck of an overshoot on startup that you have there, Scooter! :woot:

The ripple is the peak-to-peak ripple voltage that you see as the voltage is stabilizing. Can you zoom in on that ripple near the end of the startup?
 
  • #3
ToonBlue.. Are you asking how to set up the scope to measure the ripple accurately?

The problem is that you can't just turn up the gain because the 25V DC offset will send the trace off the screen, probably further than the zero adjust will cope with.

We aren't allowed to just give you the answer but have a think how you might change the scope settings to block DC but allow AC.
 

Related to Determine the output voltage ripple

1. What is output voltage ripple?

Output voltage ripple is a measure of the variation or fluctuation in the output voltage of a power supply. It is typically measured as the peak-to-peak value of the voltage waveform.

2. Why is it important to determine the output voltage ripple?

The output voltage ripple can affect the performance and stability of electronic devices that rely on a steady power supply. High levels of ripple can cause malfunctions, overheating, and premature failure of components.

3. How is output voltage ripple calculated?

Output voltage ripple is calculated by measuring the peak-to-peak voltage of the waveform and dividing it by the DC voltage level. This ratio is then multiplied by 100 to get the percentage ripple value.

4. What factors can contribute to output voltage ripple?

There are several factors that can contribute to output voltage ripple, including the design and quality of the power supply, the load on the power supply, and the frequency and type of AC input voltage.

5. How can output voltage ripple be reduced?

Output voltage ripple can be reduced by using a higher quality power supply with better filtering components, minimizing the load on the power supply, and using a higher frequency AC input voltage. Additionally, adding external capacitors or using a voltage regulator circuit can also help reduce ripple.

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