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+/- 30 kV(60 kV) LAB HV powersupply with custom flyback transformers, variable

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Patrick
Fri Dec 04 2015, 10:04PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
 		I want to see how well this works out, I'm rebuilding mine : Link2


1449266699 2431 FT160992 1324600055 2431 Ft120576 Sam 0775cc
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Erlend^SE
Sat Dec 05 2015, 12:43AM
Erlend^SE Registered Member #1565 Joined: Wed Jun 25 2008, 09:08PM
Location: Norway
Posts: 159
Patrick wrote ...

I want to see how well this works out, I'm rebuilding mine : Link2


Note: my supply will fit within 10x15 (base) x15 (tall) cm (not including cables)

I have ordered the board, so getting somewhere.

Will have to do a multi-component order to get the other parts needed.

I wonder about building a HV isolator based on spinning wheel of capacitors, so I can get 60 kV isolated.

Board will be managed from UART control panel (not designed) or Ethernet control from computer. (also added RS232 & RS485)
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Erlend^SE
Thu Dec 31 2015, 07:12PM
Erlend^SE Registered Member #1565 Joined: Wed Jun 25 2008, 09:08PM
Location: Norway
Posts: 159
 		Test-fitted the components loosely, no soldering so far.

Seems to fit nicely together

1451589028 1565 FT160992 Tryout


Just put RJ45 jack (ethernet), DSub (rs232), power input (screw terminals) in place. Looking good.
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woodchuck
Thu Dec 31 2015, 07:57PM
woodchuck Registered Member #39190 Joined: Sat Oct 26 2013, 09:15AM
Location: Boise National Forest
Posts: 65
 		I'm following this with great interest. Love what you've done to date!

So you were driving the transformer at 30 kHz when you obtained 10 mA @ 30 kV? Is the maximum frequency somewhat limited by parasitic capacitance of secondary?
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Patrick
Mon Jan 04 2016, 05:22PM
Patrick Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
 		how do you know its 10mA ?
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Erlend^SE
Mon Jan 04 2016, 05:26PM
Erlend^SE Registered Member #1565 Joined: Wed Jun 25 2008, 09:08PM
Location: Norway
Posts: 159
 		1. the transformers on that board is 3.3 mA, the other ones are 10 mA.

2. they are made to order to do 10 mA (blocks)/3.3 mA (round ones).
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Erlend^SE
Tue Mar 29 2016, 08:57PM
Erlend^SE Registered Member #1565 Joined: Wed Jun 25 2008, 09:08PM
Location: Norway
Posts: 159
 		Progress:

Soldered on the logic + internal voltage regulators & FET's and drivers(not transformers yet).

Ethernet seems to work (ordering a genuine chip, seems like the ENC424J600 chips from aliexpress is junk)

Gate waveform looks good (low side only tested, no voltage on bridge)

Got to code some kind of data-logging before taking it live!
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Erlend^SE
Sat Apr 02 2016, 01:49PM
Erlend^SE Registered Member #1565 Joined: Wed Jun 25 2008, 09:08PM
Location: Norway
Posts: 159
 		Pictures of board as of how it currently is here.

Waiting for a shipment of parts expected to arrive next week, then I should be able to get Ethernet up & running.

Next is code tuning, and transformer testing (with spark-gap)


02
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Vale
Sun Apr 03 2016, 09:02AM
Vale Registered Member #54139 Joined: Mon Dec 29 2014, 08:19PM
Location:
Posts: 7
 		Looks neat, what's with the large jumper and smd button on that ic?
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Erlend^SE
Sun Apr 03 2016, 10:24AM
Erlend^SE Registered Member #1565 Joined: Wed Jun 25 2008, 09:08PM
Location: Norway
Posts: 159
 		It's actually a 25 MHz crystal for ethernet. I didn't have the right shape.
It will be replaced with a crystal that fits, as soon as I get the package I am waiting for. (Next week)
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