The Circuits tab lets you set the load as impedance, solve resonant LLC converters, configure delta connections, and perform many other useful setups. Beneath the interface, the equation system (sparse matrix) is defined using Kirchhoff’s circuit laws.
By default, TRAFOLO sets up a simple circuit with windings connected to their respective sources and ground. If this setup is insufficient, you can add linear elements (L-R-C) and configure connections using circuit netlists.
The specific index values do not matter if unconnected nodes use different indexes. Nodes with the same index are considered connected.
Electronic circuits for connecting FEM components with sources and L, R, and C components
IMPORTANT: This is not a traditional SPICE simulator, so you must account for additional numerical errors and potential challenges when coupling FEM components to circuits. For example, large resistors should be added between sources and ground in a delta connection to avoid an over-constrained system and help the solver find a solution that satisfies Kirchhoff’s circuit law.
The primary winding is connected in a delta configuration, while the secondary winding is connected in a star configuration with the neutral grounded.
