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Registered Member #1938
Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 701
Thanks for your replies.
I don't have them here, so I'll draw the schematic later today.
It is very similar to what Ash posted, the components have different ratings. Yes it also uses TVSs.
Proud Mary, do you think oil is necessary? The boards have almost perfect soldering, to prevent corona, and they were used in the recipient shown in picture 1, under air. I have enough mineral oil, but would like to keep this clean, unless there is no other alternative.
I'd also like to build a good driver, given the fact this module has a resistive/capacitive divider to measure the output. I could use this to control the PWM signal driving the Flyback, and have something close to a regulated HV supply. Hopefully after I put the schematics we can come up with something, since I put my trust in your help. Thanks!
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
radhoo wrote ...
Proud Mary, do you think oil is necessary? The boards have almost perfect soldering, to prevent corona, and they were used in the recipient shown in picture 1, under air. I have enough mineral oil, but would like to keep this clean, unless there is no other alternative.
In the top picture, the apparatus is shewn in a tank - an oil tank, I must suppose.
Registered Member #1938
Joined: Sun Jan 25 2009, 12:44PM
Location: Romania
Posts: 701
Do you think I have a chance of rebuilding a decent driver?
I read the article Steve posted, there are some details there. The advanced diode/caps protection is in fact an array of HV Resistors in the white pipe. The driver seems to be running directly on 220V, on a fixed frequency to drive the flyback.
I've also seen some schematics, including what Ash posted, but they a bit too complicated for what I can do. I might be able to get my hands on this module:
It is the module prior to the multiplier, but does this make things easier for me? This module on the other hand has another complicated connector.
I can drive the flyback directly, but it would be really nice to use the feedback from the HV divider to have a regulated supply, not to mention other protection mechanisms I'm not aware of (that have been designed for this supply).
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
radhoo wrote ...
Do you think I have a chance of rebuilding a decent driver?
I read the article Steve posted, there are some details there. The advanced diode/caps protection is in fact an array of HV Resistors in the white pipe. The driver seems to be running directly on 220V, on a fixed frequency to drive the flyback.
I've also seen some schematics, including what Ash posted, but they a bit too complicated for what I can do. I might be able to get my hands on this module:
It is the module prior to the multiplier, but does this make things easier for me? This module on the other hand has another complicated connector.
I can drive the flyback directly, but it would be really nice to use the feedback from the HV divider to have a regulated supply, not to mention other protection mechanisms I'm not aware of (that have been designed for this supply).
There won't be anything complicated or difficult about driving those flybacks once you have transcribed the part of the circuit surrounding the transformer on the board.
I would guess that there will be a PWM feedback loop so that the output will remain stable across variable loads, and perhaps even some 'hardening' circuits to protect the module from EMP, or radiation, depending on the application.
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