Power balance (Transient Magnetic application)
Introduction
In Transient Magnetic application, the resolution is carried out for each time step. The power balance is carried out for a time interval defined by the user.
Subsystems definition: reminder
A system comprises one or more subsystems as the one presented in the figure below.
Computation / results
For each of the subsystems, as well as for the time interval defined by the user (Δt = t_{2}  t_{1}), the following quantities are computed:
 the stored energies (instantaneous values, for t = t_{1} and for t = t_{2})
 the dissipated powers (mean values over the time interval Δt)
Stored energies
For the stored energies, a summary of the computed quantities is presented in the table below.
Subsystem 
Stored energy (at a moment t) (in J) 


Internal 
Magnetic energy stored in the computation domain: , with 

Internal mechanical energy:  
Electrical 
Energy stored in the coils: Energy stored in the capacitors: 

Mechanical 
External mechanical energy

Dissipated powers
For the dissipated powers, a summary of the calculated quantities is presented in the table below.
Subsystem 
Losses (instantaneous values) (in W) 
Losses (mean values) (in W) 

Internal 
Losses by Joule effect in solid conductors Losses by Joule effect in stranded conductors 

Internal mechanical losses: (translating motion) (rotating motion) 

Electrical  Losses by Joule effect (resistive components):  
Mechanical 
External mechanical losses: (translating motion) (rotating motion) 