3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
Forum Discussion
walkers2rad wrote:
Professor... Is there a difference in the claimed digitals and what honda does? Somewhere I read that they were transistor technology and more of a msw output? Just curious cause I dont know.
There are some "lower end" digital generators that do use TTL (Transistor-Transistor-Logic) technology to produce a so called MSW (modified sine wave). The ones I have seen are in the 1,000 watt output class.
Honda does not use TTL circuits to produce a MSW in their inverter gennys. It also appears that what you have is not a TTL inverter.
As for Matthew_B's comments on spectacular melt downs - well, it does happen. The electrolytic referenced could fail, but it is highly unlikely unless the case is punctured or an extreme over voltage occurs. One thing for sure, when an electrolytic lets go it will sound like someone fired a shotgun!
The doughnut things are ceramic-ferrite toroidal core transformers. They are typically used in high frequency circuits rather than traditional iron core transformers due to their high permeability. As Matthew_B pointed out they may also be wound as single layer inductors to block DC current. What purpose they serve in your unit is something I cannot determine from just the photo - but the number of turns and size of the wire visible on them makes me suspect that they are inductors rather than transformers.
As for the other parts of the circuit - one can only guess. I would hope that both the front and rear end of the inverter would be adequately protected by fuses and diodes.
In this type of genny overload is the worst enemy as it is possible to create excessive heat in the P/N junctions of the most critical devices used in the module. It would also be useless in the aftermath of an atomic bomb explosion as the electro magnetic field generated by such would destroy the components. Of course, it would most likely destroy us too - so why worry?
From what you have shared, it looks like a well built unit. What I would find interesting is the replacement cost of the module. Maybe you can call the supplier who advertises all parts in stock and get some sort of replacement parts cost breakdown. That would be extremely interesting!
Thanks for sharing all this excellent information and photos.
