MagnaSine Inverter Questions
I just completed an upgrade to my little coach, where I added four group 31 AGM 12v batteries and a Magnum Energy MS2812 inverter. I'll type up a little photo essay about that later. Right now, I ha...
Forum Discussion
Every electronic inverter is a modified sinewave inverter, regardless of the marketing about "pure" or "true" sinewave. I accept this. The difference is the number of steps.
A good inverter's wave will have a lot of steps, so it looks "smooth" compared to the el-cheapo inverters you can find on ebay that claim 1000's of watts for only a few 100 dollars. The Magnum runs its stepped wave through a heck of an inductor (its heavy), to smooth those steps as best they can. Other inverters use digital trickery to shave those steps, but they are still there, especially when it comes time to drive heavy inductive loads and those with poor power factors.
I've had a chance to spend more time in my rig, and it appears the ringing in the bulbs only happens when the CHARGER is operating and not the inverter. The radio interference is present all the time. I will put my scope on the AC and DC sides out of curiosity and post the pictures here.
I suspect the radio interference may be due to an insufficient chassis ground of the inverter. I admit I got impatient and used a smaller chassis ground wire than was recommended, rather than put off finishing the project another day. Time and weather permitting this weekend, I'll take everything apart again and investigate, as well as upgrading the chassis ground wire.
A good inverter's wave will have a lot of steps, so it looks "smooth" compared to the el-cheapo inverters you can find on ebay that claim 1000's of watts for only a few 100 dollars. The Magnum runs its stepped wave through a heck of an inductor (its heavy), to smooth those steps as best they can. Other inverters use digital trickery to shave those steps, but they are still there, especially when it comes time to drive heavy inductive loads and those with poor power factors.
I've had a chance to spend more time in my rig, and it appears the ringing in the bulbs only happens when the CHARGER is operating and not the inverter. The radio interference is present all the time. I will put my scope on the AC and DC sides out of curiosity and post the pictures here.
I suspect the radio interference may be due to an insufficient chassis ground of the inverter. I admit I got impatient and used a smaller chassis ground wire than was recommended, rather than put off finishing the project another day. Time and weather permitting this weekend, I'll take everything apart again and investigate, as well as upgrading the chassis ground wire.
