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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: Microwave oven from 110V to 220V
Date: Wed, 09 Oct 2002 14:06:34 GMT
NNTP-Posting-Date: Wed, 09 Oct 2002 07:06:34 PDT
> Ahmdsamir wrote:
> > Hi there
> > is it ok to use a transformer to run a microwave oven originaly for
> > 110V/60Hz , with a 220/[50Hz]?? i.e. does the mains frequency has any effect
> > on the operation of the microwave???
> > thanks
> > ahmdsamir
> Possibly OK; although the internal transformer will be less
> efficient at 50 Hz. and so may get hotter especially with
> prolonged use. I don't think it will affect the control functions
> (push buttons/display etc.) if yours has that feature. What size
> and type is yours?
> But more to the point microwaves take a lot of power for brief
> periods so a pretty big separate transformer, or something, will
> be required to step down the 220 to 110!
> If you use a single winding auto transformer it will have to
> carry the total power required which can be anywhere from 600 to
> 1200 watts.
> If you use a 'bucking' transformer arrangement the secondary
> winding feeding the microwave and opposing the 220 volts so that
> it is 'stepped down' to 110, will have to be wound with
> sufficiently heavy wire to carry the total current required by
> the microwave; even though in this configuration the transformer
> will only have to handle half of the total power required by the
> microwave. Transformers of this size are not necessarily small or
By what enormously strange method of calculation do you get the result
that the ordinary transformer "will only have to handle half of the
total power?" Did someone change the laws of the universe while I was
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org
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