Re: Term: Mag Amp

Thanks Jon but let me just get it clear. Are you saying that if you put,
say, the high voltage winding of a mains transformer in series with the
low voltage motor, it will boost its starting torque?

Ian

Jon Elson wrote:

>
> From: Jon Elson <jmelson@...>
>
> "Ian W. Wright" wrote:
>
> > From: "Ian W. Wright" <Ian@...>
> >
> > Sorry to seem so dim but what, pray, is a mag amp?
> >
> > > The trick Bridgeport uses (pretty tricky, but not original) is to use a mag
> > > amp on the AC input to the rectifier.
>
> Sorry, old technology. Mag amp is short for a magnetic amplifier.
> This goes back to WW-II, and certainly Korea.
> A way of getting a lot of gain without much energy loss is to use a winding
> of many turns of fine wire to drive an inductor into and out of saturation.
> When the inductor is saturated, AC current passes through a winding
> of a modest number of turns of heavy wire fairly easily. When the control
> winding does not saturate the inductor, then the inductance blocks the
> power flow through the power winding.
>
> Jon
>
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--
Best wishes

Ian

--

Ian W. Wright LBHI
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