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Re: Auto synchronous generators ? eh!.. practical redundancy

PostPosted: Mon May 13, 2013 6:59 pm
by Tracker
As I said - NO EXPERIENCE in those fields, so I have been working on intuition..

So my thinking is likely correct.. Now the POWER was said to be automatic and the two or many generators, completely SHARE the load and ramp up automatically..

Sorry - I just find it interesting..

Re: Auto synchronous generators ? eh!.. practical redundancy

PostPosted: Tue Jun 18, 2013 9:35 pm
by davidg
Tracker wrote:None of this answers my original concern as to how two generators can just connect and synchronize "magnetically".... all I know is that the suggestion was that the second generator connects to the first for a time until it's in sync and then locks and generates.. my thinking is that the second device acts as a small load to the first, slowing or speeding it up until locked.. all just interesting ...!

Well how about something less complicated look at GCInverters what do they do? They look for an A/C signal 50Hz in this case then if they find one they use that sync to it and then plonk online how simple (Well easy to say). So lets have generator/s produce power via an alternator rectify it to DC feed it through a version of a "GCInverter" like device but this one has some mods it looks for an A/C signal if it does not find one it produces power and provides it at 50Hz electronically if you add another generator of the same type it does the same thing but when it looks for a frequency it finds one so it follows that signal and syncs and then plonks online follows the voltage and frequency and there you have it multi-generator automatically producing additive power which allows for variable speed motors but stable 50Hz power.

Damn I should patent that :lol: :lol:

Re: Auto synchronous generators ? eh!.. practical redundancy

PostPosted: Thu Jun 20, 2013 6:36 am
by davidg
I should added one other thing and that was so they share the load evenly they need to have the same voltage as well so the first one set the voltage the next one/s follow to provide the same voltage

Re: Auto synchronous generators ? eh!.. practical redunda

PostPosted: Sat Jan 04, 2014 8:21 am
by Warpspeed
Some of the newer small standby power generators are now what they call "inverter generators".

These use a standard ac alternator, the output of which is rectified to produce a high dc voltage, which in turn drives an inverter stage that produces the outgiong 240v 50Hz ac power.

The advantages of doing this are many.
A "normal" 240 volt ac machine needs to be run up to exact speed and very carefully phase synchronised to the mains before you can close the electrical connection. It then needs to run at constant fixed speed, regardless of load.

With an indpendant isolated power generator, it can just be started up and run, but if you expect 50 Hz from it, it still needs to run at a fixed RPM regardless of load. This can be noisy and inefficient at very low load.

What the inverter generator does, it allows the engine to run at whatever speed it needs to run to generate enough dc power. The inverter can then ELECTRONICALLY output 240 volts and 50Hz quite independantly of engine speed. At very low loads the engine can perhaps tick over at just above fast idle speed, saving fuel, noise, and engine wear. Switch in the big electrical load, and the engine quickly throttles up to max power at full RPM. And your 240v and 50Hz stays constant.

With a microprocessor and a few "smarts" you could just connect it up, push the start button, and away it goes all by itself without any need to do anything else.
Just like a grid tie inverter, the electronics keeps the inverter mains synchronised.