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4hv.org :: Forums :: High Voltage
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strange mot

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Kristian
Sat Sept 01 2007, 02:40PM Print
Kristian Registered Member #611 Joined: Wed Mar 28 2007, 11:40PM
Location: Hudsonville, Michigan
Posts: 79
I found this mot yesterday and I was wondering if anyone has ever see anything like this? It kind of looks like a flyback. I'm not very electronically inclined, so I'm having a little trouble figuring whats going on here. I see the transformer, capacitors and diodes, but beyond that I'm lost. Any info on this thing would be appreciated.
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Dago
Sat Sept 01 2007, 02:56PM
Dago Registered Member #538 Joined: Sun Feb 18 2007, 08:33PM
Location: Finland
Posts: 181
That is a solid-state microwave oven powersupply where the "MOT" is a ferrite cored transformer which is being driven with high-frequency AC with the driver electronics.
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sparky
Sat Sept 01 2007, 05:22PM
sparky Registered Member #530 Joined: Sat Feb 17 2007, 07:56AM
Location: Victoria BC, Canada
Posts: 178
Ahh, nice find! Basically you have your power supply for a big solid state Tesla Coil already prebuilt for you. Find another and you could run a dual solid state circuit into a voltage doubler.... who knows right? Endless possibilties!
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Kristian
Sun Sept 02 2007, 08:06PM
Kristian Registered Member #611 Joined: Wed Mar 28 2007, 11:40PM
Location: Hudsonville, Michigan
Posts: 79
I don't know that much about solid state coils yet, or solid state anything for that matter. I'll hold on to it until I can identify the components and understand how it works.

I have tore apart 40 or 50 microwaves and have never seen one of these before, I don't know if I'll ever just happen to find another. Who knows though, I might get lucky.
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Marko
Sun Sept 02 2007, 08:22PM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Most of new light ovens have these. As is, it's hard to use for a TC supply, it outputs only 4kV and is without filtering (100Hz buzz.)

Somebody clever enough could although hack it with a multiplier (which is easy with high frequency) and a filter cap on low voltage side, and power a TC. I haven't seen anyone doing that although.
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Dr. Dark Current
Sun Sept 02 2007, 08:43PM
Dr. Dark Current Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Marko wrote ...


Somebody clever enough could although hack it with a multiplier (which is easy with high frequency) and a filter cap on low voltage side, and power a TC. I haven't seen anyone doing that although.
As you can see from the circuit board there's already a multiplier/doubler of some sort.

I'm wondering, could you draw an arc off of one of these without blowing it up?
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Marko
Sun Sept 02 2007, 09:09PM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145

As you can see from the circuit board there's already a multiplier/doubler of some sort.

Yup, but only 4kV for a magnetron. It simply imitates an iron mot with level shifter, and to power a TC it would need to be further doubled, and then used with resonant charging.


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Coronafix
Mon Sept 03 2007, 01:15AM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
I saw that Sam Barros uses one on his rail gun.
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sparky
Mon Sept 03 2007, 06:28AM
sparky Registered Member #530 Joined: Sat Feb 17 2007, 07:56AM
Location: Victoria BC, Canada
Posts: 178
PS: Don't let size fool you! These solid state MOTs are equally as deadly as a large iron core MOT.
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Wolfram
Mon Sept 03 2007, 08:36AM
Wolfram Registered Member #33 Joined: Sat Feb 04 2006, 01:31PM
Location: Norway
Posts: 971
It is possible to draw arcs with them, but mine went into protection and had to be restarted when the arc went out.
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