RE: [CAD_CAM_EDM_DRO] U.S. 220 vs Euro 220

Peter:

The rotors are beefier because it takes more steel to avoid saturating the
rotor at 50 hz than at 60 hz. Transformers in Europe will be either larger,
or derated for the same reason.

I would expect that stepper and servo motors would not be affected by the
difference in operating voltage and frequency if their controllers convert
the line power to DC. The controllers, of course, will be different (the
difference may be as little as either a step-up or step-down transformer)
unless they have universal power supplies (90-240 volt input) the way many
of the notebook (also called lap-top) computers do.

-- Carol & Jerry Jankura
Strongsville, Ohio
So many toys, so little time



-----Original Message-----
From: Sven Peter, TAD S.A. [mailto:peteryco@...]
Sent: Thursday, May 17, 2001 4:17 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] U.S. 220 vs Euro 220


Europe is dangerous for US machines!!!!!
US is no problem for European machines!

I looked meanwhile through some other posts on this thread.
It seems like Europe is now changing over to 230 Volt 50 Herz.
This might make changes better for you. But when I lived back
in Germany we had 220V 50 Hz. One leg life and the other neutral and the
third true ground. This might give problems as it was mentioned with
120V users,
which often are hidden inside the machine without mentioning in the
manual.

These two currents are definitely very different.
In America we have 240 Volts and 60 Hertz frequency
in Europe there is 220V and 50 Hertz.(Now or soon 230V)
The 50 Hz motors are designed to have much more inertia than the 60 Hz
ones. The rotors are much beefier in Europe.
At least this is the case with threefase and normal singlefase motors.
How it is with DC and step motors I have no clue.

The result is you can easily take a machine from Europe to America.
Only the motors rise 20% in speed and loose 20% in torque.
For contactors you frequently have to step up the voltage
from 220V 20% up to 264 Volt. Otherwise they shatter.
But if you take from America a machine to Europe you will
burn it in a very short time,because the motors low inertia.
In other words the gap between the sinus curve of voltage in 50 Hz
is too long and the motor for 60 Hz does not come over this dead point.
If you want to take it with you, you probably need a inverter to produce
your own 60 Hz current.
Hope this is a hint and saves you a loss.
Good Luck
Sven Peter

blueveil@... wrote:

> Does anyone know if U.S. 220 is the same as European 220?
> Could I take a 220 single phase cnc machine to Europe and use
> it without any adapters?
> Any knowledge on this subject would be greatly appreciated.
>
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Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the
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