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4hv.org :: Forums :: General Science and Electronics
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6kw Pure Sine Wave Inverter? Is it possible?

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Steve Conner
Fri Jun 01 2012, 04:36PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Hard to say without the generator manual, but I'd expect the 230V outlet is just connected between one phase and neutral of the 400V outlet. So in that case you could get about 2kW from it.

A 3 phase generator needs a balanced 3 phase load to achieve its full rated power.

PFC is power factor correction. It's also explained in the article where you got the 19% figure.
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blackwoolf511
Sat Jun 02 2012, 05:26AM
blackwoolf511 Registered Member #4278 Joined: Tue Dec 20 2011, 09:03PM
Location:
Posts: 17
so can someone tell me if this 1-phase avr generator motor is good for home use?

Link2
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Steve Conner
Sat Jun 02 2012, 08:58AM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Looks like a reasonable quality unit. But bear in mind that it only has one bearing, it relies on the engine to support the other end of the shaft, so it has to be used with the correct engine.
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blackwoolf511
Sat Jun 02 2012, 01:06PM
blackwoolf511 Registered Member #4278 Joined: Tue Dec 20 2011, 09:03PM
Location:
Posts: 17
So finally i have to choose the 1-phase generator.

Why does a generator motor have a single bearing, physically talking it gives more vibrations the whole system and forces the engine to hold the weight of the generator and consequently by consuming more fuel?
Shouldn't generator motors all have 2 bearings?
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Steve Conner
Sat Jun 02 2012, 02:06PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Because it saves money and allows the engine-generator system to be smaller, I guess.

The engine's crankshaft bearing is probably pretty solid, I doubt the extra weight of the generator rotor causes it any trouble.

There are plenty of 2-bearing generators available. Mr. Ludens used some Chinese ones for a microhydro installation: Link2

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