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Registered Member #1143
Joined: Sun Nov 25 2007, 04:55PM
Location: Vilnius, Lithuania
Posts: 721
Hi all i am making large DRSSTC (like 15KW or so) Now i madded all electronics (except one brick IGBT driver..) Coil will be 15KW 311V 1500Apeak 60KHz. IGBT are FF400R06KE3. Here some pictures base driver
Bridge
Led current indicator
IGBT driver with desaturation detection:
IGBT driver 3 channel power supply +18 0 -8V
Does someone can buy brass bolts for me, and send to Lithuania?
Registered Member #1143
Joined: Sun Nov 25 2007, 04:55PM
Location: Vilnius, Lithuania
Posts: 721
Here is IGBT snubber. i don't want to protect IGBT with TVS, so i decided to use RCD snubber.It don't let voltage grow up to power supply voltage... Here is principal circuit:
and here is snubber:
i am using 47R 20W noninductive resistor and 30ns 30A 600V ultrafast diode (all are D2-pak)
Registered Member #1143
Joined: Sun Nov 25 2007, 04:55PM
Location: Vilnius, Lithuania
Posts: 721
Robert2 wrote ...
Very good job !! You use IR2153S ? What is transformer in IGBT driver ? You use GDT with half bridge IR driver? When you finish project ?
IR2153 is Half bridge controller for 3 channel IGBT supply. I am using 4 identical power channels with 7908 and 7818 stabilization. 3 (3 channel is, because i need two power supply for high side, and one for low side) Driver signal will be take from 1:1 GDT ( UCC's controlled) Driver is like Steve Ward (with 74HC109N). When i finish it, i don't know, maybe in summer :) Driver is also like Steve Ward brick driver, but i am using completely different circuit, just MOSFET circuit are same... (i have STD10PF06 and STD12NF06 ) I have some problem. I made circuit for turn on delay i have 470pF capacitor, and need to make ~300ns delay ,what R have to be near UCC27321 ? (cap are between 2 and 4 leg) Principe are simple. From GDT i will charge cap (470pF) with resistor, and when i have turn off, mosfet will discharge cap, so don't have delay for turn off ( delay need, because IGBT have 500ns delay Tdoff ).
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Large DRSSTC [update]
