Re: [TCML] MOT Measurements

[tesla <tesla@xxxxxxxxxxxxxxx>]

Update

With 800v rms excitation 0.4mA flows so again Z=2000, same inductance as at
200v excitation
Rgds
Ted
From: "tesla" <tesla@xxxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Monday, January 05, 2009 7:40 PM
Subject: Re: [TCML] MOT Measurements


> Hi Again all
>
> Did measurements and advise.
>
> Single 600 Watt MOT, magnetic shunts in:
>
> With primary sided shorted (replicates low source Z mains) 200v rms of
> secondary excitation causes 100mA to flow.
>
> The modulus of the impedance is therefore 2000 ohms. As the resistive
> component is small compared to this the modulus is almost the same as the
> Inductive reactance. So from 2pifL=Z L is 6.3Hy
>
> What are the measurement conditions used to give results as high as 40Hy
??
>
> I believe my technique is validly measuring the series output inductance
of
> an operating MOT as an external voltage generator can replace the one
> provided when the Xfrmr is operating. Have I missed something in my
thinking
> ??. I will try the same measurement with an AC excitation of about 1kv to
> bring the xfrmr closer to normal operating conditions but I expect this
will
> lower further the Xl value as saturation impacts
> Ta
> Ted
>
>

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla