Quote:
Originally Posted by h&jeuropa
Shindengen regulators / rectifiers are shunt regulators. I'm not an expert, but my understanding is that a shunt regulator / rectifier is not very efficient. They dissipate energy not needed to satisfy power demand as heat. The advantage of the Shindengen units over other shunt regulators / rectifiers is that they use MOSFET technology rather than SCR technology, MOSFET being more efficient. So it is a more efficient way to dissipate energy not needed.
The Ducatti regulator / rectifier is a bridge rectifier which only rectifies (converts from AC to DC) the AC from the dynmo when needed to satisfy power demand. If your power requirements are modest, much of the time the SCRs are turned off, generating no heat. When needed, they turn on and heat is generated. It also provides more pure DC so it is easier to filter and smooth.
The John Deere unit mentioned looks pretty good too. Here's a link to more information on it: http://www.n56ml.com/corvair/dynamo.html
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The FH series from Shindengen are shunts. They have just come out with their first series regulator which is the SH775 and they have two more (more powerful) versions in development. The SH775 is good for 14Amps continuous without any cooling and claims 27Amps with light cooling, 35max.
I'd rather wait for the slightly more powerful version as I like to have some tolerance in respect to the currents we are running and as it is in a rather warm environment. I'm just thinking of summer-in-Southern-Arizona kind of warm environment. Anywhere else, I wouldn't be so concerned.
I've tried to find a reliable source for the JD regulators and could not find one that didn't have reports online that the unit appeared to be of bad quality and did not stand the current for a loinger period of time. Lots of burnouts and such on all the models from AM101....6, over MIA8..... up to the latest AKH6004. Also I was not able to locate any kind of spec sheet that could tell me for what current rating these JD regs where designed. It clearly worked for N56ML but the pictures show an old AM101...6 model that used to be sold by JD and was apparently a much higher quality part than what you can get today. As I cannot find a supplier or a spec sheet I'll be staying away from this one for now.
There is also a US made option with series configuration, which I am currently investigating.
Compu-fire is building, among other electrical things, Harley-Davidson replacement R/R units. The
55120 @ 32Amp looks very good to me.
I am trying to get wiring information from them for non-Harley installations. The unit is readily available and looks very, very promising to me.