ZVS Buck Error Inductor Current

General
1

Hello, I’m new to PLECS and I can’t get a resonant ZVS buck circuit to run. When I simplify the circuit by replacing the buck converter with a 5 A DC current source, I get an error:

**State/source-dependence during switching.
The state

  • BuckZVS1/Lr
    is directly dependent on the source(s)
  • BuckZVS1/I_dc**

I don’t know how to fix this.

ZVS C
ZVS C464×313 13.1 KB

2

Please see this FAQ on the Plexim website. There also is a section on the user manual dedicated to this error message. See “Using PLECS + Error Messages + State-source dependency of components”. In your case the issue arises because of a conflict between the inductor current and the DC current source.

One approach from the manual:

Introduce a relatively large parallel resistance with the current source in order to break the inductance/current source dependency.