Initialization by static calculation: particular cases
General case
The static initialization permits a computation close to reality (without numeric transient) in the cases where there are nonnull sources of field at the initial time t = 0 s: magnets, currents (constant, threephase...)
Particular cases
There are a number of situations in which there are:
 nonnull sources of field at the initial time t = 0 s (as described previously)
 and a change in the state of the circuit at t = 0 s
 Contactor (establishment of the voltage at t = 0 s)
 Closing switch
 Discharge of capacitor
These particular situations are presented in the blocks below.
Contactor
Contactor with magnet; with establishment of the voltage at t = 0 s :
 initialization by static calculation allows to take into account the flux generated by the magnets

to respect the "assumptions associated with the initialization by static calculation", the voltage should be set at t = 0 + epsilon
⇒ voltage is described with the function Valid or the function ValidLR as presented in the figure below
Finite element description:  Circuit description: 



Coil around the core and the magnet is not represented 
U(t) = U_{0}*Valid(t, 1^{e8},) U(t) = U_{0}*ValidLR(t,0, ,0,0) 
Switch
Device with magnet, and electrical circuit with a switch closes at t = 0 s :
 initialization by static calculation allows to take into account the flux generated by the magnets

to respect the "assumptions associated with the initialization by static calculation", the switch must be closed at t = 0 + epsilon
⇒ see examples below
U_{0}(t) = 48*ValidLR(t,0,,0,0)  U_{0}(t) = 5*cos(ω*t)*ValidLR(Time,0,,0,0) 
Capacitor
Device with magnet, and electrical circuit with discharge of a capacitor at t = 0s :
 initialization by static calculation allows to take into account the flux generated by the magnets
 to respect the "assumptions associated with the initialization by static calculation", you must:
 add a switch in series with the capacitor
 open the switch at t = 0 + epsilon