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Signal Converters

Introduction Features
Principles Classifications
Engineering Data Further Information
Explanation of Terms Troubleshooting

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Converters with Effective Value Calculation and Converters with Average Value Rectification

Average-value-rectification Converters first perform processing with an average value, and then they convert the result to a sinusoidal effective value and output it.
That means that there will be no difference in the output value between an Average-value-rectification Converter and an Effective-value-calculation Converter if the input is a sine wave. Neither type is better than the other.
There is a general misunderstanding that an Effective-valuecalculation Converter is better because it costs more than an Average-value-rectification Converter. However, when the waveform is greatly distorted, such as in a load current that is controlled with a thyristor, an Average-value-rectification Converter cannot correctly obtain an effective value, and there will be a difference between it and the value measured with an Effective-value-calculation Converter. If the waveform of the measured value has no distortions, the output that is obtained will be the same no matter which type of Converter is selected. But we recommend that you select an Effectivevalue-calculation Converter if there is a possibility that distortions will occur in the waveform.
This type of Converter, however, cannot be used in combination with an inverter because the input waveform will be less than 15% of the third harmonic wave.

Current Waveform Distorted by a Thyristor

Applicable Models:

Models with Effective Value Calculation: K3FK-CE and K3FM-CE
Models with Average Value Rectification: K3FM-CA and K3FK-C