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Model Forum / Radio Controlled / Helicopters / August 2005Inverter
Hi Guys I'm looking to buy a decent quality inverter 12v to 250v for our field. Power output of between 2000-3000 watts. Does anyone have any ideas regards good and bad suppliers and manufacturers. Thanks in advance  SignatureAdrian Smith www.YourStadium.com Superb aerial pictures of UK football stadiums. That is quite an input at 12v current for full output (3000/(12*.9)=280Amps). I would go for a petrol driven type. Regards Peter > Hi Guys > [quoted text clipped - 5 lines] > > Thanks in advance A generator does not suit our purpose unfortunately. Yes we need a lot of battery power:-) SignatureAdrian Smith www.YourStadium.com Superb aerial pictures of UK football stadiums. > That is quite an input at 12v current for full output > (3000/(12*.9)=280Amps). I would go for a petrol driven type. [quoted text clipped - 10 lines] >> >> Thanks in advance >>> Hi Guys >>> [quoted text clipped - 5 lines] >>> >>> Thanks in advance You could try www.maplin.co.uk for stuff like that. I bought a small 300W 12v invertor not long ago and it didn't cost that much. They drop their prices quite often which is good, and can probably point you in the direction of a good invertor source if they don't have one. Good Luck >>>> Hi Guys >>>> [quoted text clipped - 12 lines] > > Good Luck InvertEr. Damn my spelling. I always put a bloody "o" in there. lol http://www.maplin.co.uk/Module.aspx?ModuleNo=45033&doy=31m8D Maplin have the 1000W version on offer at the moment, £99. Is the 3KW all into the same load, or could you use a few of these seperately (not sure running them all from the same 12v battery would be a good idea though). > >>>> Hi Guys > >>>> [quoted text clipped - 14 lines] > > InvertEr. Damn my spelling. I always put a bloody "o" in there. lol I looked at the maplin ones but they can't power an inductive load light strip lights etc. Thanks for pointing me there though. You can normally discover on the net the best brands but I am having some difficulty discovering this with inverters. SignatureAdrian Smith www.YourStadium.com Superb aerial pictures of UK football stadiums. > http://www.maplin.co.uk/Module.aspx?ModuleNo=45033&doy=31m8D > [quoted text clipped - 23 lines] >> >> InvertEr. Damn my spelling. I always put a bloody "o" in there. lol Will an inverter not be electrically very noisey and give a poor approximation to a sine wave that some devices may not like? Regards Peter >A generator does not suit our purpose unfortunately. > [quoted text clipped - 14 lines] >>> >>> Thanks in advance | Will an inverter not be electrically very noisey and give a poor | approximation to a sine wave that some devices may not like? The really cheap inverters use a square wave. The better ones use a modified square wave. The even better ones have a real sine wave. More on that here -- http://www.pcguide.com/ref/power/ext/ups/funcOutput-c.html (In case it's not obvious, a UPS is just a charger, battery and inverter all in one package, with some glue to switch over quickly when needed. It's not quite that simple, but it's close enough.) Most devices work OK with a modified square wave. It all depends on what sort of devices he's looking to run. SignatureDoug McLaren, dougmc@frenzy.com Inform all the troops that communications have completely broken down. --Ashleigh Brilliant It's to power tools and lights and maybe the odd laptop. Must be able to power inductive loads. A modified sine wave will be good enough but all modified sine waves are not equal. SignatureAdrian Smith www.YourStadium.com Superb aerial pictures of UK football stadiums. > > | Will an inverter not be electrically very noisey and give a poor [quoted text clipped - 15 lines] > > It all depends on what sort of devices he's looking to run. | I'm looking to buy a decent quality inverter 12v to 250v for our field. | Power output of between 2000-3000 watts. Do you really need that much power? To get 2000 watts out of a 12 volt battery requires drawing 166 amps, and that's assuming 100% efficiency. (Apparantly the good ones are over 90% efficient, so apparantly efficiency isn't too bad.) But 166 amps is a lot. You'll need a bank of 12 volt batteries and something to charge them if you expect to use this for any length of time. (Most car batteries can do 166 amps, but only for a few seconds.) Even a 50 watt solar panel (50 watts in full direct sunlight, I might add, which you won't get for long as the sun moves across the sky unless you have some sort of tracking system) isn't cheap. (Or were you going to charge the batteries in some other way?) And if this is all kept out at a somewhat isolated flying field, it's going to be an attactive target for thieves, being quite expensive. Maybe you'll need to use your hair dryers (1500 watts) at home rather than at the field :) SignatureDoug McLaren, dougmc@frenzy.com If you believe everything you read, better not read. --Japanese proverb > | I'm looking to buy a decent quality inverter 12v to 250v for our field. > | Power output of between 2000-3000 watts. [quoted text clipped - 20 lines] > Maybe you'll need to use your hair dryers (1500 watts) at home rather > than at the field :) And if you REALLY want an inverter, have a look at these as a guide. They aint cheap for the power output you require. http://www.bullnet.co.uk/shops/test/inverter.htm I know, I've done the calculation. It's a lot of current. Thanks for the link I'll give them a call tomorrow and ask for their specs. SignatureAdrian Smith www.YourStadium.com Superb aerial pictures of UK football stadiums. > >> | I'm looking to buy a decent quality inverter 12v to 250v for our field. [quoted text clipped - 25 lines] > aint cheap for the power output you require. > http://www.bullnet.co.uk/shops/test/inverter.htm |
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