Table 3: Comparison of the Power-Invariant and reluctance models.
| Quantities | Power-Invariant | Reluctance |
| Conserved Quantity | Magnetic Flux [Wb] | ? |
| Flow | Magnetic Current [Wb/s] | Flux [Wb] |
| Effort | Magnetic Voltage [t•A] | MMF [t•A] |
| Dissipative Element | Magnetic Resistance [Ω-1] | Reluctance [H-1] |
| Energy Storage Element | Magnetic Capacitance [H] | ? |
| Energy Storage Element | Magnetic Inductance [F] | ? |