Hi
Does anyone know if you can put a 110v plug on a 230v drill so that th drill would become 110v?
Cheer
-- brendonavoo69
Hi
Does anyone know if you can put a 110v plug on a 230v drill so that th drill would become 110v?
Cheer
-- brendonavoo69
Yes, you can, but the 230V drill will become a 110V firecracker.
I don't know - why don't you try it and let us know how you get on?
PS. Don't.
Only if you like the smell of melting plastic!
You need one of these:
Would connecting it to a PP9 battery make it a 9V drill?
In what way do you think just changing the plug will change the voltage of the drill?
MBQ
other way round. The OP has a 240v drill and a 110v supply
The OP needs a step UP transformer like this
It is probably cheaper the buy another drill though.
Sparks...
I wouldn't reccomend this at all.....
.... but years ago a mate of mine had a couple of 110volt drills - he gave me one and I found a suitable (isolating) transformer for it but it was a bit under-powered.
He was a mad bugger and did very well running his at 240 volts !
(It was a classic diecast alloy Black and Decker !)
Yes, well spotted! Sorry was reading what I thought he wrote.
(still at least doing it the way descibed has less potential for pyrotechnics than sticking 240V into a 110V tool)
You may be able to change the armature on the drill for one with 110V windings.
A 240v drill will run ok on 110v, but at half the speed and a fair bit lower power. But if its not for a lot of work it may do ok. If OTOH you've got whole days of drilling to do, I'd get a 240v one, it'll be quicker.
NT
Just for a minute I wondered if you were going to say ...
"So he connected them in series"
:))
DG
Sorry you missed April 1st by a mile
Dave
Unfortunately, the back-emf in the motor windings is proportional to the speed, so as it slows down, more current flows, the windings get very hot... which is how drill motors get burned out. (don't believe me? hold the trigger in on a stalled drill for a few minutes, smell how hot it gets. Then buy a new drill).
Hope this helps, Dave H. (The engineer formerly known as Homeless)
the comparison is not equivalent, and running the motor on lower v will reduce i, not increase it. Ask news:sci.electronics.design if you wish.
NT
If the novel mains is 110V or 115V it is likely it may be alternating at
60Hz, so this 20% increase will influence behaviour of any optimised @50Hz, step-up 1:2 transformer and of the (nominally 50Hz) drill motor connected to the boosted voltage. Jim
We're not tallking about stalling it. Running on a lower voltage and hence at a lower speed will not damage a motor, all other things being equal.
Does DC motor theory applies to AC power tools?
MBQ
"All other things being equal", then yes. But the ratio of excess heat to power output goes up somewhere between twice and 4 times (linear to square law, depending on what the limiting factor of the drill design is). As most hand-held power tools already run quite hot to keep their size and weight down, you're either at risk of cooking the drill, or you have to limit it to a far less powerful output..
Yes, except that you obviously have to allow for frequency effects too. There are no DC motors - if you expect it to rotate, then you have to make a rotating field somehow, either by powering static windings with AC or by chopping DC through a commutator. The current in at least some of those windings always has an AC component.
Univeral / brushed motor designs (every drill) won't care.
The magnetic effciency boost between 50Hz and 60Hz is minuscule (although real).
Ac fans are routinely speed controlled, and just like drill motors theyre cooled by their own blades. Fan motors stay close to the same temp over a wide v range.
NT
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