IGBT

[Cohen Yacov Net]

Question

Is it a way to connect 2 IGBT in serial and to be able to handle twice the
voltage the component can tolerate.
In other words IGBT APT45GP120B2DF2 can work till 1200. Is it a way to use
this 2 components switching a power supply having 2400 Volts?

 

[The Al Bundy]

"Cohen Yacov Net" <cohenyac@netvision.net.il> wrote
news:41408315@news.bezeqint.net...

Question

Is it a way to connect 2 IGBT in serial and to be able to handle twice
the
voltage the component can tolerate.
In other words IGBT APT45GP120B2DF2 can work till 1200. Is it a way to use
this 2 components switching a power supply having 2400 Volts?

Dont do it. Sooner or later you will blow up one of these IGBTs, taking the
other one also with it.

The problem is that the point where the IGBT switches on is not a precise
defined area. So in other words one IGBT will start to conduct earlier then
the 2nd one, and this 2nd one gets the whole voltage (>1200V) across it's
collector-emitter.

To double the current it is possible to put MOSFET or IGBTs parrallel, but
to double the voltage by putting is series doesnt work. Look for components
with a higher Vce rating.

Al

 

[Ken Smith]

In article <cht3lt$ua8$1@news1.tilbu1.nb.home.nl>,
The Al Bundy <the_al_bundy@*^no-spam!^*hotmail.com> wrote:

"Cohen Yacov Net" <cohenyac@netvision.net.il> wrote
news:41408315@news.bezeqint.net...
Question

Is it a way to connect 2 IGBT in serial and to be able to handle twice
the
voltage the component can tolerate.
In other words IGBT APT45GP120B2DF2 can work till 1200. Is it a way to use
this 2 components switching a power supply having 2400 Volts?


Dont do it. Sooner or later you will blow up one of these IGBTs, taking the
other one also with it.

The problem is that the point where the IGBT switches on is not a precise
defined area. So in other words one IGBT will start to conduct earlier then
the 2nd one, and this 2nd one gets the whole voltage (>1200V) across it's
collector-emitter.

To double the current it is possible to put MOSFET or IGBTs parrallel, but
to double the voltage by putting is series doesnt work. Look for components
with a higher Vce rating.

I'd say "ignore the above advice" and have a little fun. I've made
circuits using two bipolars to work at higher voltages. IGBTs are getting
cheap so if you blow up 10 or 11, you still would be in it for less than
the cost of dinner for two.

--
--
kensmith@rahul.net forging knowledge