You can apply the following loads on a 2D transient magnetic analysis:
Constraints - vector potential (AZ) and time-integrated scalar potential (VOLT)
Forces - current segment (CSGZ), current (AMPS)
Surface loads - Maxwell surfaces (MXWF)
Body loads - (source current density (JS), virtual displacement (MVDI)
To apply these loads, use the commands listed in Loading Options for 2D Static Magnetic Analysis.