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DC Voltage Formula:
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The DC voltage calculation from AC RMS (Root Mean Square) voltage is used to determine the equivalent DC voltage that would produce the same power as the AC voltage. This is particularly important in power supply design and electrical engineering applications.
The calculator uses the formula:
Where:
Explanation: The formula converts the RMS value of an AC voltage to the peak DC voltage that would be obtained after rectification and filtering.
Details: Accurate DC voltage calculation is crucial for designing power supplies, determining appropriate component ratings, and ensuring proper operation of electronic circuits that require DC power from AC sources.
Tips: Enter the AC RMS voltage in volts. The value must be a positive number. The calculator will compute the equivalent DC voltage.
Q1: Why multiply by √2 to get DC from AC RMS?
A: The √2 factor converts the RMS voltage to peak voltage, which represents the maximum DC voltage obtainable from a perfectly rectified AC signal.
Q2: Is this calculation accurate for all types of AC waveforms?
A: This calculation is specifically for pure sine waves. For other waveforms (square, triangle, etc.), different conversion factors apply.
Q3: Does this account for voltage drop in rectifiers?
A: No, this calculation provides the theoretical maximum DC voltage. Real-world circuits will have slightly lower voltages due to diode voltage drops and other losses.
Q4: What's the difference between AC peak voltage and AC RMS voltage?
A: RMS voltage is the effective voltage that produces the same power as a DC voltage, while peak voltage is the maximum instantaneous value of the AC waveform.
Q5: Can I use this for three-phase AC systems?
A: This formula is for single-phase AC systems. Three-phase systems require different calculations depending on the rectifier configuration.