# PSpice Orcad three phase simulation help.

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#### Ponke

##### Newbie level 3
Hi all!

I'm having a problem simulating this circuit below: it's a three-phase diode bridge rectifier. The error I get is the following:

"
ERROR -- Convergence problem in transient analysis at Time = 20.69E-06
Time step = 15.92E-15, minimum allowable step size = 60.00E-15

These voltages failed to converge:

V(N01303) = -10.00GV \ -42.48MV
V(N00985) = -10.00GV \ -42.48MV
V(N01118) = -10.00GV \ -1.627GV
V(N01015) = -10.00GV \ -42.48MV
V(N01252) = -10.00GV \ 1.542GV

These supply currents failed to converge:

I(L_L1) = 131.07KA \ -29.58A
I(L_L2) = 8.590GA \ -15.29KA
I(L_L3) = 128.74KA \ 15.23KA
I(V_V3) = -128.74KA \ -15.23KA
I(V_V1) = -131.07KA \ 29.58A
I(V_V2) = -8.590GA \ 15.29KA

These devices failed to converge:
D_D12 D_D7 D_D8 D_D13 D_D9 D_D10
"

It seems as an enormous amounts of volts and amps :roll: . If you have any suggestions I'll be happy to hear them!

you did not mention your requirements fully i mean your desired output,ripple,load current etc.But if you want go with that design you mentioned on the image you need to add a ground to the load side to avoid unnecessary trasisent effect. it will solve your problem.

• abhajn and Ponke

Points: 2

### abhajn

Points: 2
you did not mention your requirements fully i mean your desired output,ripple,load current etc.But if you want go with that design you mentioned on the image you need to add a ground to the load side to avoid unnecessary trasisent effect. it will solve your problem.

Awesome! It works! :-D

Thanks a lot JUBAYER!

You are welcome....Ponke

Many error arise from trying to use ideal part to simulate real circuit , so you must understand nature of simulator such as Calculating: Represent, Algebra, Data Analysis, Graphics.

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