modelPolyphaseInductance
Polyphase inductance
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
This example compares an electric polyphase inductor with equivalent fundamental wave reluctance circuits,
one with reluctances individual for each phase (s) and the other with a common reluctance for all phases (m).
The phase inductance L and the magnetic fundamental wave reluctance R_m
for reluctances individual to the phases (s) and for a reluctance common to all phases (m) are related by:
R_ms = effectiveTurns^2 / L R_mm = effectiveTurns^2 / L * m / 2
The currents
resistor_e.i[1]resistor_s.i[1]resistor_m.i[1]
show the same waveforms and thus prove the equivalence of the different modelling approaches.
Note that the number of initial equations (which depends on the number of phases m, too) depends on either individual or common implementation of the reluctance.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | m | 3 | Number of phases |
| SI.Frequency | f | 1 | Supply frequency |
| SI.Voltage | VRMS | 100 | RMS supply voltage |
| SI.Resistance | R | 0.1 | Leader cable resistance |
| Real | effectiveTurns | 5 | Effective number of turns |
| SI.Inductance | L | 1 | Load inductance |
| SI.Reluctance | R_ms | effectiveTurns^2/L | Individual equivalent magnetic reluctances |
| SI.Reluctance | R_mm | m/2*effectiveTurns^2/L | Common equivalent magnetic reluctance |