Comments on: Power inverter designs

By: Tomi Engdahl

Tomi Engdahl — Tue, 29 Nov 2022 11:30:00 +0000

https://hackaday.com/2022/11/25/unlocking-a-locked-down-inverter/

By: Tomi Engdahl

Tomi Engdahl — Fri, 19 Aug 2022 09:08:13 +0000

https://www.electricaltechnology.org/2022/08/cycloconverter.html#

By: Tomi Engdahl

Tomi Engdahl — Thu, 24 Mar 2022 13:03:58 +0000

https://circuitdiagrams.in/3-phase-inverter-using-arduino/

By: Tomi Engdahl

Tomi Engdahl — Tue, 08 Mar 2022 09:56:24 +0000

How i made this Mini Inverter
https://www.youtube.com/watch?v=RTtPpPd0l2o

Hello Friends, in this video ill show you making 50-60w Mini Inverter.

By: Tomi Engdahl

Tomi Engdahl — Thu, 03 Mar 2022 14:23:32 +0000

Simple Powerful 3000W Inverter // How to Make Powerful Inverter Using Mosfet IRFP450
https://www.youtube.com/watch?v=Bg4pMpYFWio

By: Tomi Engdahl

Tomi Engdahl — Mon, 17 Jan 2022 20:08:00 +0000

For classic mains frequency inverter the same formulas than for mains transformer design apply. For inverter use it is a good idea to design the transformer for at least 20-30% higher power than what is your inverter can output for better voltage regulation and to have some extra peak power reserve and safely handle non-sine waveform.

By: Tomi Engdahl

Tomi Engdahl — Tue, 07 Dec 2021 17:52:06 +0000

3 Phase Inverter Circuit Using Arduino
Project link: https://circuitdiagrams.in/3-phase-inverter-using-arduino

By: Tomi Engdahl

Tomi Engdahl — Mon, 22 Nov 2021 12:04:57 +0000

Inside a portable battery power station
https://www.youtube.com/watch?v=0aFj4l3EDa8

Opening up my EcoFlow Delta Max to see what’s inside and make a small change (which turned out to be pointless)

By: Tomi Engdahl

Tomi Engdahl — Wed, 03 Nov 2021 13:59:12 +0000

300 Amp Fuse Blowing with 4KW of Load from an Inverter – Safety Mechanism Prepare for the Unexpected
https://www.youtube.com/watch?v=gMvrMemPxrg

I bought a couple of 300 Amp fuses from an eBay seller and decided to build an enclosure on the cheap. Be careful as wood is FLAMMABLE.
Using 4KW of load at 240 volts the fuse did blow… After a while of uncertainty.
The temperature of the fuse did peak at 90 degrees Celsius at one point with 200 Amps flowing through it at 12v but this seemed to be down to the retaining bolts being poor conductors.

Prepare for the Unexpected

Viewer comments:

You should bolt the cables directly to the fuse without the nut spacing it. Currently all of the current is flowing through the zinc plated STEEL nut and bolt which is a poor conductor and will produce a lot of heat due to the high resistance. This might be the whole reason why it blew.

nothing strange. The fuse is in the battery side, battery are 12 Volts, if load is 4000W, amps will be 4000W/12V = 333 Amperes. The 300A fuse is not “big enough” for a 4000W load.

Fairly standard for wire fuses to take over their rating before going , but they should go out pretty quick under fault conditions , certainly a smart move having one inline in case the inverter develops a fault (iv seen them go short circuit before) makes a real mess without any fusing

I usually don’t go through eBay I like craigslist or Amazon but for craigslist always go local and make sure it works before you buy

By: Tomi Engdahl

Tomi Engdahl — Wed, 27 Oct 2021 11:05:38 +0000

Vintage S.A.C. mains inverter teardown
https://www.youtube.com/watch?v=XH4lfFOGdOI

A mate of mine let me have this old mains inverter to play with. Perhaps this is so simple even I can work out how it works. Let’s see…

Schematic: https://www.facebook.com/AintBigAintClever/posts/2901198693525141

INDEX
0:00 Index
0:10 Introduction: an old mains inverter
0:51 A quick run, both off and on-load
1:29 What’s inside?
2:54 The obligatory schematic
3:02 Top board: input polarity and undervoltage protection
4:41 Middle board: frequency generator
5:32 Breadboarding the frequency generator
6:58 Bottom board: power handling
8:40 What’s the power rating of this thing?