What is the measuring scheme/protocol for conducted EMI in DC/AC single phase inverter in both DC and AC side using LISN, and what are the differences in design between DC LISN and AC LISN ?
I'll be glad If anyone could provide /suggest good references (articles, books) regarding LISN design.
Thanks
In my understanding, the DC LISN is rated to over 100VDC or less mostly suitable for standard DC voltages used like 24V, 48V, 96V etc.
On the contrary, the AC LISN operates at the 110VAC or 230VAC (single phase) or the 300/440VAC 3-phase systems. Therefore, protection from such High voltages and eventually power spikes is more stringent in the AC LISN as compared to the DC LISN which mostly operate on battery powered systems.
Hope my comments are useful to you.
Best wishes!
-Prasanna Waichal
Prasanna Waichal That's correct but in case of DC/AC grid connected converters are both "DC LISN" and "AC LISN" used for Conducted EMI ? are there any accessible references for LISN analysis and design.
Thank You.
Probably you should know as what you want to investigate for EMI/EMC of?
1) Whether you want to observed the Conducted emissions from the DC/AC Grid connected converter?
OR
2) The conducted emissions of the load connected to the DC/AC Converter connected on the GRID?
Prasanna Waichal Sorry for being imprecise, what I meant was your first suggestion which is : the conducted emission FROM the DC/AC converter into : both AC BUS (Grid) and DC BUS ! and I may have narrowed a bit the context; the inverter could be off-grid or a grid-tied inverter. Does using just an RSIL on the DC side include both aspects of conducted emission (to DC and AC side) ? and How is it possible to isolate the converter from eventual disturbances from AC side ?
Sid,
So the answer is pretty straight forward, I believe.
1) To check the performance on the AC output side (of the Grid-Tied-Inverter GTI) you connect, possibly a 3-phase LISN rated for 415V AC 50/60Hz operation and then take measurements at different load conditions.. from No-Load (0%) to Full-Load (100%).
2) At the input side, repeat above measurements using DC LISN.
3) Better if you connect simultaneoys both the LISNs and observe/note measurements. This will remove any unwanted/stray pickup should there be any.
Wishing you best,
Would be happy to see your measurement results.
Prasanna Waichal, thanks for your answers !
I'll be glad to share the results.
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