Re: [TCML] MOT Measurements

["Herwig Roscher" <herwig.roscher@xxxxxx>]

Hello Bart,
 
> I took a a few minutes to measure the characteristics of a MOT
- thank you very much for sharing the results of your tests. Great 
work!
 
> My conclusion here is that unless one is using a very large cap value, 
> there is no transformer resonance issue.
- A very clear statement. So the assumption that the measured(!) 
overvoltage across the MOT's secondary winding was caused by EMF 
could be true. Remember: The MOT's no load output voltage was 2232 
Vrms and its voltage connected to the circuitry of Piranha II rose to 
3675 Vrms.

My conclusions are:
* Use potted MOTs only
* Use HV diodes with 15 kV PIV only (normally an overkill for 2 kV 			
   tranny output)
* Design the MMC voltage with enough "headroom"

Do you know of other means of protection?





Bye		Herwig

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