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4hv.org :: Forums :: High Voltage
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ZVS Problem

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technology man
Thu Dec 01 2011, 11:30AM Print
technology man Registered Member #4193 Joined: Mon Nov 07 2011, 11:21AM
Location: St. Louis
Posts: 33
Hi,
i have build a ZVS like Mazillis-Shematic but if i turn the voltage to 5V or 7V my power supply (0-30V/10A) go to overload.
And the ZVS get more as 8A with no arc after the mosfets go hot.
The mosfets haven´t contact to the heatsink.

Please help me to find the problem by my ZVS.
Photos:

1322738624 4193 FT0 Img 16531

1322738728 4193 FT0 Img 16541

1322738827 4193 FT0 Img 16571

1322738917 4193 FT0 Img 16591
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Alex M
Thu Dec 01 2011, 01:22PM
Alex M Registered Member #3943 Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Are you certain that the MOSFET drains are not electrically connected via the heatsink? Check it with a multimeter to be 100% sure.
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technology man
Thu Dec 01 2011, 02:06PM
technology man Registered Member #4193 Joined: Mon Nov 07 2011, 11:21AM
Location: St. Louis
Posts: 33
Thanks for your answer.
I ve checked the connect from the mosfet to the heatsink, and it haven´t electrically connecting.
Is the problem maybe the electrical inductor with the yellow core ?
If the flyback isn´t connected, the ZVS get 0A with flyback 8A by 5V.
Is the flyback not connected i can turn the voltage to 30V and the ZVS get 0A.
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technology man
Thu Dec 01 2011, 04:59PM
technology man Registered Member #4193 Joined: Mon Nov 07 2011, 11:21AM
Location: St. Louis
Posts: 33
Time is coming and it works baby.
My ZVS is running, the apperature is great.
Pics coming in the next hours.
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