Jim: Yes, they have to generate RF energy when multi-amperes are rapidly switched. BUT,.......they should be constructed such that they do not RADIATE that energy. There are two sides to the RFI/EMC
Exactly my point, David. And switching speed is critical for EFFICIENCY in power systems -- it is unrelated to the "speed" of Si. Those switching devices would "fry" if slowed down, because power is
I WELL understand, Jim!! I've been at this game for some 30+ years. I know the SMPS designers don't line resistances or small inductors inserted in series with the gate drive of the final switching F
IN further poking around on the FCC OET site under Generac, I can't find a single report filed on anything except wireless hardware. I could not locate any complete systems which would include the pa
David, Solar systems are digital devices that are classified as unintentional emitters. If they are marketed into residential environments, they must meet Part 15 B emissions limits. The only uninten
< So, according to Ed Hare, ARRL, solar power systems might fall under Part 15, Subpart B, as unintentional radiators as an "appliance". > This is wrong. According to Ed Hare, solar systems DO fall u
Yes, ED, I'm well aware of all that. In my looking at all the reports filed with FCC, none addressed the complete system, only the intentional radiators (Zigibee, BlueTooth, or whatever). Yes, as a C
< In the future, if power companies who go mostly solar could be redefined as unintentional emitters, could that loosen up requirements that they stop harmful interference if that's what it does for
You are not well aware if you were looking in the FCC certification database for reports on digital-devices unintentional emitters. They are not required to file anything into the certification datab
Correct, Jim. In my growing contact with the industry, I am looking to form a WG to try to put some of the good approaches into an IEEE Recommended Practice. I am positioned to help that go forward p
Yes, I may have jumped to conclusions too fast based on what I wanted to see. Apologies to everyone on the RFI list. I've been out of it in retirement for some 11 years and am not as sharp as I once