What Formula is Needed to Find the Capacitor Value for a Half Wave Rectifier?

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Discussion Overview

The discussion centers around determining the appropriate formula to calculate the capacitor value needed for a half wave rectifier, given specific parameters such as load current, input frequency, and desired ripple voltage. The context is primarily homework-related, focusing on theoretical understanding and application of electrical engineering concepts.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant states the problem of needing a formula to find the capacitor value for a half wave rectifier, specifying the load current, frequency, and ripple voltage.
  • Another participant suggests the formula V_r = I_{dc}/(fC) as a potential solution, where V_r is the ripple voltage, I_{dc} is the direct current, f is the frequency, and C is the capacitance. They also recommend searching for "half-wave rectifier capacitor filter" for further information.
  • There is a request for additional help or clarification on the topic from another participant.

Areas of Agreement / Disagreement

The discussion does not present a consensus on the formula, as participants are still exploring options and seeking clarification. There is no clear agreement on a definitive solution.

Contextual Notes

Participants have not provided a complete derivation of the formula, and there may be assumptions regarding the ideal behavior of the rectifier and capacitor that are not explicitly stated.

snowJT
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Homework Statement



A half wave rectifier is supplying a load current of 100 mA. The input frequency is 60 Hz. Find the capacitor value required to limit the ripple ot 160 mVpp.

Really... I can solve this I'm sure... But I'm wondering what formula I need to use... I've never been shown one in class, and I don't have a textbook, so a little help with a formula would be nice...
 
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its V = IR
 
somebody please?
 
I think the equation you're looking for is V_r=I_{dc}/fC.
Where Vr is the ripple voltage, Idc is the direct current, f is the frequency of the supply voltage, and C is the capacitance. But I would do a search for something like "half-wave rectifier capacitor filter" to learn about it and be sure that you agree with it. OK? I don't want to mislead you.
 

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