Time for MORE POWER! 1400a 1200v IGBT controller build!

Electric Motors and Controllers
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amberwolf
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Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Post by amberwolf » Oct 24, 2017 12:02 am

Build your own caps shaped the way you want? ;)

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Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Post by Lebowski » Oct 24, 2017 2:24 am

Arlo1 wrote: Now to let everyone know.. HH is very doubtful this will work well. He let me know I am breaking all the design rules. But I know I am breaking the laminated buss design rule and my hope is because they are in side the middle it won't be such a big deal.
I am with HH on this one... I think a lot of attention should be paid to how the currents flow and how they change throughout the full switching cycles. Throughout the switching cycle the current should (as much as possible) stay in the same 3D space, minimizing current and voltage spikes and associated extra switching losses.

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Re: Time for MORE POWER! 1400a 1200v IGBT controller build

Post by Arlo1 » Oct 24, 2017 8:33 am

Lebowski wrote:
Arlo1 wrote: Now to let everyone know.. HH is very doubtful this will work well. He let me know I am breaking all the design rules. But I know I am breaking the laminated buss design rule and my hope is because they are in side the middle it won't be such a big deal.
I am with HH on this one... I think a lot of attention should be paid to how the currents flow and how they change throughout the full switching cycles. Throughout the switching cycle the current should (as much as possible) stay in the same 3D space, minimizing current and voltage spikes and associated extra switching losses.
So maybe you guys don't understand the current paths?

In a rectangular controller they flow in awkward paths. And the inductance from the end caps on each side is quite large.

What I have here is the current flowing from battery > to top busbars which link all caps together > to caps > to IGBT + - with another cap parallel link on the + - end of the IGBTs as well.
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