Hi, i am design a bldc motor driver, simulating the circuit in ltspice, and there is problem, when it is about to reach to the end of simulation, the phase voltage suddently drops, and says that time step too small, anyone could help, thanks so much.

 

Welcome to AAC.
Please post your .asc file and the IR2130 model file.

 

Hi jcj,
Please post the asy files for these two models.
E

 

Hi jcj,
I have tried various methods, but I cannot remove this error???

Try adding this options text.

.options cshunt =10f gshunt=1n abstol=1n vntol=1m

E

 

Hi jcj,
I have tried various methods, but I cannot remove this error???

Try adding this options text.

.options cshunt =10f gshunt=1n abstol=1n vntol=1m

E
View attachment 332801

Thank you for helping, the file route of the error is my files route, i guess that's why

 

Hi jcj,
I have tried various methods, but I cannot remove this error???

Try adding this options text.

.options cshunt =10f gshunt=1n abstol=1n vntol=1m

E
View attachment 332801

I add the option text, it's running just fine now, i'll update when it finishs

 

Hi jcj,
I have tried various methods, but I cannot remove this error???

Try adding this options text.

.options cshunt =10f gshunt=1n abstol=1n vntol=1m

E
View attachment 332801

So, this is the phase voltage after adding the text, i just wonder why its the case? Thank you so much