Series Connection of IGBT's (OLTC / SSTC)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Sparktron01-at-comcast-dot-net 


SSTC Experimenters

I found this link to IEEE Transactions on Industry Standards (Nov./Dec. 
2001) describing a series connection of IGBT's using a very simple 
auxiliary circuit per stage switch consisting of 3 resistors (passive V 
equilization, aux gate drive), 1 high speed HV diode (FR107 for gate 
drive), and 2 capacitors (dV/dt control).  A demo switch was simulated and 
actually built using sixteen 1.2kV, 400A Semikron IGBT modules 
(SMK400GB124D), and 20kV switching -at- 400A was demonstrated.  Maximum 
voltage imbalance was ~5% with turn on and ~15% with turn off (with 20% of 
less being considered acceptable); with measured turn on and turn off times 
of <1.0uS reported...  Directly applicable to HV OLTC and DRSSTC 
adaptations.  Passive devices are very small (<1W).
<http://palgong.knu.ac.kr/~kimhg/High-voltage%20switch%20using%20series-connected%20IGBTs%20with%20simple%20auxiliary%20circuit.pdf>http://palgong.knu.ac.kr/~kimhg/High-voltage%20switch%20using%20series-connected%20IGBTs%20with%20simple%20auxiliary%20circuit.pdf

Time to get those IGBT samples out and start building...

Best Regards
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA. USA