Noob needs HELP!!

[Admin]

Hi all,

I have this circuit that I am hope to use for HV electrolysis. It has
damaged every Mosfet and IGBT I have tried. It even damaged an IGBT
that is rated 600V and 58 amps. The circuit works without a hitch when
the load is resistive like a light bulb.

But as soon as I hook up a transformer the IGBT fails in 10 seconds. It
has trouble with inductive loads.

I have tried clamping the IGBT with a diode to no avail.

Please, somebody take a look and tell me what I am doing wrong. My
power source is and auto inverter.

 

[Peter Hucker]

On Sun, 11 Jan 2009 19:22:27 -0000, Admin <sowhati@comcast.net> wrote:

Hi all,

I have this circuit that I am hope to use for HV electrolysis. It has
damaged every Mosfet and IGBT I have tried. It even damaged an IGBT
that is rated 600V and 58 amps. The circuit works without a hitch when
the load is resistive like a light bulb.

But as soon as I hook up a transformer the IGBT fails in 10 seconds. It
has trouble with inductive loads.

I have tried clamping the IGBT with a diode to no avail.

Please, somebody take a look and tell me what I am doing wrong. My
power source is and auto inverter.

I can see it here, but a lot of news servers do not allow pictures on groups without "binary" in the name. Thus most people won't see the picture, or may not even see the post.

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

Lemon entry my dear Watson.

 

[Herman]

"Admin" <sowhati@comcast.net> wrote in message
news:2009011111222775249-sowhati@comcastnet...

Hi all,

I have this circuit that I am hope to use for HV electrolysis. It has
damaged every Mosfet and IGBT I have tried. It even damaged an IGBT
that is rated 600V and 58 amps. The circuit works without a hitch when
the load is resistive like a light bulb.

But as soon as I hook up a transformer the IGBT fails in 10 seconds. It
has trouble with inductive loads.

I have tried clamping the IGBT with a diode to no avail.

Please, somebody take a look and tell me what I am doing wrong. My
power source is and auto inverter.

The .22uF 400 volt cap should be 330uF 400 volts.

 

[Admin]

On 2009-01-12 17:06:24 -0800, "Herman" <ripe@bellsouth.net> said:

"Admin" <sowhati@comcast.net> wrote in message
news:2009011111222775249-sowhati@comcastnet...

Hi all,

I have this circuit that I am hope to use for HV electrolysis. It has
damaged every Mosfet and IGBT I have tried. It even damaged an IGBT
that is rated 600V and 58 amps. The circuit works without a hitch when
the load is resistive like a light bulb.

But as soon as I hook up a transformer the IGBT fails in 10 seconds. It
has trouble with inductive loads.

I have tried clamping the IGBT with a diode to no avail.

Please, somebody take a look and tell me what I am doing wrong. My
power source is and auto inverter.



The .22uF 400 volt cap should be 330uF 400 volts.

Thanks. I will try that.
--
Make extra income!! Goto http://www.paysforever.com/JA6680.htm

 

[Herman]

"Admin" <sowhati@comcast.net> wrote in message
news:200901131209538930-sowhati@comcastnet...

On 2009-01-12 17:06:24 -0800, "Herman" <ripe@bellsouth.net> said:

"Admin" <sowhati@comcast.net> wrote in message
news:2009011111222775249-sowhati@comcastnet...

Hi all,

I have this circuit that I am hope to use for HV electrolysis. It has
damaged every Mosfet and IGBT I have tried. It even damaged an IGBT
that is rated 600V and 58 amps. The circuit works without a hitch when
the load is resistive like a light bulb.

But as soon as I hook up a transformer the IGBT fails in 10 seconds. It
has trouble with inductive loads.

I have tried clamping the IGBT with a diode to no avail.

Please, somebody take a look and tell me what I am doing wrong. My
power source is and auto inverter.



The .22uF 400 volt cap should be 330uF 400 volts.

Thanks. I will try that.
--
Make extra income!! Goto http://www.paysforever.com/JA6680.htm

Since you have an isolated supply for your pulse generator, use it's power
supply and eliminate the opto isolator. Opto isolators have a rather long
rise and fall time. Use a full wave bridge on your low voltage supply and
make the filter capacitor 220 uF.