EMF transforms electrical energy into rotational mechanical
energy. It is used as basic building block of an electrical
machine. The mechanical connector flange can be connected to
elements of the Modelica.Mechanics.Rotational library. The magnetic
field is excited by the excitation current provided at the input
connector ie.
To obtain the Rikitake equations, the negative
armature current of the other emf has to be used as excitation
current ie.