step up/down transformer
Oct 17th 2016, 4:13 am
#76
Account Closed
Joined: Jan 2006
Posts: 0
Re: step up/down transformer
hahaha...nor me but, co-incidentally, in a few hours I'm having my belly cut to have an open Incisional Ventral Hernia repaired... so your comment about basic surgery, without equipment created with the knowledge of physics, hasn't inspired nor given me much confidence...fortunately I'll be asleep...
Oct 18th 2016, 3:24 pm
#77
Magnificently Withering
Joined: Jan 2007
Location: Oakville, ON
Posts: 6,891
Re: step up/down transformer
The debate here is how a UK 240VAC drill works from a N.A. 240VAC system. There aren't any bridged amplifiers in a UK Black and Decker drill.
The UK drill only has one wire that is wound around two stators to produce an alternating N and S polarity which turns the rotor.
Your point about the voltage is only relevant to how much load can be driven i.e. the amount of power available to do a particular job.
The principle is the AC sine wave creates the magnetic field.
This frequency shift creates an inductive magnetic field by alternating between sine + & - to create a N & S magnetic field.
A 12 VDC motor uses a commutator to alternate between + & - to do the same.
It's explained here.....
Electric motors and generators
The UK drill only has one wire that is wound around two stators to produce an alternating N and S polarity which turns the rotor.
Your point about the voltage is only relevant to how much load can be driven i.e. the amount of power available to do a particular job.
The principle is the AC sine wave creates the magnetic field.
This frequency shift creates an inductive magnetic field by alternating between sine + & - to create a N & S magnetic field.
A 12 VDC motor uses a commutator to alternate between + & - to do the same.
It's explained here.....
Electric motors and generators
The blue and red lines are the two legs of the split-phase 120V power. The pea-green line is the potential difference between these two - a 240V single-phase power supply, which quite happily makes the drill motor go round and round.
Oct 18th 2016, 4:39 pm
#78
Proudly Scarberian
Joined: Aug 2014
Location: Scarberia
Posts: 2,196
Re: step up/down transformer
Very well explained Mr O.
Unfortunately, for making the dark wizardry that is electrical engineering look understandable, I am going to have to kill you. I'll do my best to get to the next pissup ;p
Unfortunately, for making the dark wizardry that is electrical engineering look understandable, I am going to have to kill you. I'll do my best to get to the next pissup ;p
