Discussion Overview
The discussion focuses on designing a 12V, 2A unregulated power supply, specifically addressing the specifications for the transformer, bridge rectifier, and smoothing capacitor. Participants explore calculations related to voltage, current, and ripple factor, as well as the methodology for determining component ratings.
Discussion Character
- Homework-related
- Mathematical reasoning
- Technical explanation
Main Points Raised
- One participant calculates the transformer VA rating as exceeding 24VA based on the output voltage and current.
- The peak secondary voltage is determined to be 17V, derived from the output voltage multiplied by the square root of 2.
- The capacitor value is calculated using the formula C = I / (2f * Vr), resulting in approximately 24,540 micro-farads.
- Another participant questions the output voltage, suggesting it may be around 15V DC after accounting for the rectifier voltage drop.
- Clarification is sought on the capacitor calculation, particularly regarding the ripple voltage conversion.
- Participants express uncertainty about the methodology used for the calculations, with one participant affirming that it looks correct.
Areas of Agreement / Disagreement
There is no consensus on the correctness of the calculations or methodology, as some participants express uncertainty and seek clarification on specific points.
Contextual Notes
Participants have not fully resolved the assumptions regarding ripple voltage calculations and the impact of the rectifier on output voltage. The discussion includes varying interpretations of the formulas and their application.