The magnetic elements in PSIM (windings, leakage paths, air gaps, and magnetic cores) provide a
powerful way of modelling magnetic devices. The objective of this tutorial is to show how to
define the saturable core element.
The saturable core element has the following parameters:
Inductance Factor AL Inductance factor AL of the core, in H, defined as the
inductance per turn squared.
Resistance for Losses Resistance R, in Ohm, that represents the core losses
Coefficient phi_sat Coefficient phi_sat for the core B-H curve, in Weber
Coefficient K1 Coefficient K1 for the core B-H curve
Coefficient Kexp1 Coefficient Kexp1 for the core B-H curve
Coefficient K2 Coefficient K2 for the core B-H curve
Coefficient Kexp2 Coefficient Kexp2 for the core B-H curve
Current Flag Flag of the electric current that flows through the resistor R for
the core losses. If the rms value of the current is Irms, the core
losses can be calculated as: Pcore_loss = Irms*Irms*R.
The simulated B-H curve of the saturable core depends on the combined effect of all the
parameters above. The diagram below shows how the parameters are related to the B-H curve.
R K1 & Kexp1
AL
phi_sat / Ac
K2 & Kexp2
Fig. 1: The B-H curve of a saturable core
The inductance factor AL mainly affects the slope of the B-H curve in the linear region. A larger
value of AL will result in a steeper slope.
The magnetic elements in PSIM (windings, leakage paths, air gaps, and magnetic cores) provide apowerful way of modelling magnetic devices. The objective of this tutorial is to show how todefine the saturable core element.The saturable core element has the following parameters:Inductance Factor AL Inductance factor AL of the core, in H, defined as theinductance per turn squared.Resistance for Losses Resistance R, in Ohm, that represents the core lossesCoefficient phi_sat Coefficient phi_sat for the core B-H curve, in WeberCoefficient K1 Coefficient K1 for the core B-H curveCoefficient Kexp1 Coefficient Kexp1 for the core B-H curveCoefficient K2 Coefficient K2 for the core B-H curveCoefficient Kexp2 Coefficient Kexp2 for the core B-H curveCurrent Flag Flag of the electric current that flows through the resistor R forthe core losses. If the rms value of the current is Irms, the corelosses can be calculated as: Pcore_loss = Irms*Irms*R.The simulated B-H curve of the saturable core depends on the combined effect of all theparameters above. The diagram below shows how the parameters are related to the B-H curve.R K1 & Kexp1ALphi_sat / AcK2 & Kexp2Fig. 1: The B-H curve of a saturable coreThe inductance factor AL mainly affects the slope of the B-H curve in the linear region. A largervalue of AL will result in a steeper slope.
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