Hi alexan_e and atrianpathi,
Thank for your help.
I already downloaded your related documents about convergence problem. But, unfortunately, I can not solve my problem.
Could your please see my problem again with more detail below.
I change some detail in my circuit,
I used delay switches (1ms) for operating gate driver first.
Then the lower IGBT will turn on.
The convergence problem happen at the time the higher IGBT start turning on, that means DC voltage source (100V) applied the circuit.
I do not know why?
Please give me some hints. Thanks a lot
thanks for your help.
and this is my netlist
* source IR2106_FI
V_Vtri1 N42345 0
+PULSE 0 3.3 0 1n 1n {(1/{2*{1kHz}}-2n)} {1/1kHz}
X_U3 N55458 N45885 Sw_tClose PARAMS: tClose=1ms ttran=1u Rclosed=0.01
+ Ropen=1Meg
R_R2 N42139 N42127 18 TC=0,0
C_C1 N42241 0 1u
X_Z1 N44942 N52963 N45885 IRGP30B120KDE
V_V1 N42241 0 15Vdc
R_R6 N44396 0 2 TC=0,0
V_Vtri4 N42335 0
+PULSE 0 3.3 {3/(6*{1kHz})+0.4u} 1n 1n {(1/{2*{1kHz}}-0.8002u)} {1/1kHz}
R_R3 N42393 N55458 5 TC=0,0
X_D1 N42241 N42359 murs260t3/ON
C_C3 N44942 0 500u
X_D2 N42001 N420431 murs260t3/ON
R_R4 N42009 N420431 3 TC=0,0
X_U4 N42127 N57780 Sw_tClose PARAMS: tClose=1ms ttran=1u Rclosed=0.01
+ Ropen=1Meg
X_Z2 N45885 N57780 0 IRGP30B120KDE
X_U2 N42001 N52963 Sw_tClose PARAMS: tClose=1ms ttran=1u Rclosed=0.01
+ Ropen=1Meg
X_D3 N42127 N420911 murs260t3/ON
R_R5 N42139 N420911 3 TC=0,0
V_V2 N44942 0 100Vdc
C_C2 N42359 N42393 1u
L_L1 N45885 N44396 10mH
X_U1 N42241 N42335 N42345 0 N42359 N42009 N42393 N42139 IR2106 PARAMS:
+ CDELAY=50N RDELAY=50 T1=-40 T2=25 T3=125 V1=10 V2=15 V3=20 TOFFT1=200N
+ TOFFT2=200N TOFFT3=200N TOFFV1=200N TOFFV2=200N TOFFV3=200N TONT1=210N
+ TONT2=210N TONT3=210N TONV1=210N TONV2=210N TONV3=210N
R_R1 N42009 N42001 18 TC=0,0