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Input Current Distortion Factor Formula:
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Input current distortion factor is defined as the ratio of the RMS value of fundamental component of the input current to the RMS value of the input current including fundamental and harmonics. It measures the purity of the current waveform.
The calculator uses the Input Current Distortion Factor formula:
Where:
Explanation: The formula calculates the proportion of fundamental current component in the total RMS current, indicating how much the current waveform deviates from a pure sinusoidal shape.
Details: Accurate CDF calculation is crucial for power quality analysis, harmonic distortion assessment, and designing power factor correction systems. It helps in evaluating the efficiency and performance of electrical systems.
Tips: Enter RMS supply current fundamental component and total RMS supply current in Amperes. Both values must be positive and non-zero for accurate calculation.
Q1: What is a good CDF value?
A: A CDF value closer to 1 indicates less distortion and better power quality. Values significantly lower than 1 indicate higher harmonic content.
Q2: How is CDF related to THD?
A: CDF and Total Harmonic Distortion (THD) are related through the formula: \( THD = \sqrt{\frac{1}{CDF^2} - 1} \)
Q3: When should CDF be measured?
A: CDF should be measured during power quality assessments, especially when dealing with non-linear loads that generate harmonics.
Q4: What factors affect CDF?
A: Non-linear loads, switching power supplies, variable frequency drives, and other harmonic-generating equipment can significantly reduce CDF.
Q5: How can CDF be improved?
A: CDF can be improved by using harmonic filters, power factor correction equipment, and selecting equipment with lower harmonic generation.