Can ADE7758 measure active power of non-linear electrical loads?
Yes. It can. In fact, all ADE ICs can measure active power for all kinds of loads as long as they are measured within the bandwidth specified in the specifications table. The ADE ICs capture all the data, including the harmonic content, within the bandwidth of interest and helps to measure active power. Look for the -3 dB bandwidth specification in the datasheet to know the frequency limits for which the harmonic measurements are made. However, if the signal has a DC component, then the ADE ICs might not be able to account for it.
Below is a sample waveform of a non-linear load signal. This is the typical signal for dimmer switch applications. The proportion of time that the sine wave is ‘ON’ is determined by the dimmer. This is an example of a non-linear application where ADE ICs can be used.
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