Setting Up Current Variables

For problems with current, the Current Variables Represent setting allows you to specify one of the following two options:

• Ampere-Turns
• Amperes

This setting provides flexibility in setting up current sources with different numbers of turns and branches.

In Maxwell, current source values are specified in Ampere-turns, meaning that if a given source is driven with 2 Amps through 100 turns, then the source value must be set to 200. Inductance is calculated per-turn; therefore, to calculate EMF, the flux must be scaled by the number of turns to give the total flux.

You can create two kinds of circuit models:

• A model format where the data table is based on current in Amp-turns and flux per turn. This model internally converts currents and fluxes using the specified turn ratio. This model format was the only one available in versions of Maxwell before Maxwell 11.
• A model format where the data table is based on current in Amps and total flux. This model does no internal scaling of values, since the data is already in a form the outside circuit expects. This model format is available in Maxwell 11 and later versions.

For either model type, you can view the inductance setup to obtain information about the specified groups, turns, and branches.