Transformer for 240v to 110v - but the Watts?

[forestboy]

I'm bracing myself for an obvious answer here!

What would happen to the input Watts needed for a 1600 Watt power tool which ran on 110v if you used a 240v (230) to 110v transformer?

Would it reduce to 800 watts? or double to 3200 or stay the same?

I have a 230v 900w generator but can't find a circular saw with a feeble enough wattage rating to use with it.

Thanks.

 

[ericmark]

The watts stay the same.

2kw in gives 2kw out well not quite there are losses of course.

 

[GaryMo]

Your power tool is rated for 1600W at 110V. It's as simple as that

 

[Spark123]

Power in Watts = V x I x powerfactor, ignoring powerfactor and losses when you transform down your V x I input is the same as your V x I output, so your current in effect slightly more than doubles (ratio of 230/110) but the power remains the same.

 

[Lectrician]

Yep - Power is the constant. You don't get something for nothing in this world!

 

[Gees]

Yep - Power is the constant. You don't get something for nothing in this world!

Unless you live near a lamp post

 

[forestboy]

Thanks, I suspected there be no free lunch

 

[tim west]

unless of course we are talking superconductivity