D
david00001
- Jan 1, 1970
- 0
Hello folks,
I plan to use 2 semikron SKHI 23/12 boards to control 4 half bridge
1200V 200A Toshiba IGBTs. I want to use them as a high voltage- high
curent switch (3000 - 5000 volts, 150 amps...low duty cycle ..50usec
pulses at 50 hertz) for some experiments I want to do.
I am theorising that I should be able to connect them in series from
low side emitter to topside collector and get a switch that can cope
with transients of up to 9600 (8 x 1200) volts. I want to get the
pulses as square as possible (especially the front edge). I plan to
static balance the voltages with resistors ( I have some 15KV 100M wire
wound resistors...) connected across the load contacts of the half
bridges. I know nothing about snubbers but I intend to learn...any good
info out there?
I was hoping that those with experience in these matters might be able
to point out any flaws or give me any helpful suggestions they may
have. What would be the best way to current limit this? The current
will be passing through a non inductive load and some heavy diodes to
ground. The diodes are to stop any reverse bounce of current as I want
purely DC pulses if possible.
I am collecting parts at present. I have the IGBTs and the SKHI 23s. I
plan to build some heavy capacitors for the power supply. (I have a
large roll of 23 micron mylar )
thanks
Dave
I plan to use 2 semikron SKHI 23/12 boards to control 4 half bridge
1200V 200A Toshiba IGBTs. I want to use them as a high voltage- high
curent switch (3000 - 5000 volts, 150 amps...low duty cycle ..50usec
pulses at 50 hertz) for some experiments I want to do.
I am theorising that I should be able to connect them in series from
low side emitter to topside collector and get a switch that can cope
with transients of up to 9600 (8 x 1200) volts. I want to get the
pulses as square as possible (especially the front edge). I plan to
static balance the voltages with resistors ( I have some 15KV 100M wire
wound resistors...) connected across the load contacts of the half
bridges. I know nothing about snubbers but I intend to learn...any good
info out there?
I was hoping that those with experience in these matters might be able
to point out any flaws or give me any helpful suggestions they may
have. What would be the best way to current limit this? The current
will be passing through a non inductive load and some heavy diodes to
ground. The diodes are to stop any reverse bounce of current as I want
purely DC pulses if possible.
I am collecting parts at present. I have the IGBTs and the SKHI 23s. I
plan to build some heavy capacitors for the power supply. (I have a
large roll of 23 micron mylar )
thanks
Dave