WOLFRAM SYSTEMMODELER

VariableAdmittance

Single phase variable admittance

Wolfram Language

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SystemModel["Modelica.Electrical.QuasiStationary.SinglePhase.Basic.VariableAdmittance"]
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Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

The admittance model represents a parallel connection of a conductor and either a capacitor or inductor.

The linear admittance connects the complex voltage v with the complex current i by v*Y = i. The admittance Y_ref = G_ref + j*B_ref is given as complex input signal, representing the resistive and reactive component of the input admittance. The resistive component is modeled temperature dependent, so the real part G_actual = real(Y) is determined from the actual operating temperature and the reference input conductance real(Y_ref). The reactive component B_actual = imag(Y) is equal to imag(Y_ref) if frequencyDependent = false. Frequency dependency is considered by frequencyDependent = true, distinguishing two cases:

(a) imag(Y_ref) > 0: capacitive case
The actual susceptance B_actual is proportional to f/f_ref
(b) imag(Y_ref) < 0: inductive case
The actual susceptance B_actual is proportional to f_ref/f

Note

A zero crossing of the real or imaginary part of the admittance signal Y_ref could cause singularities due to the actual structure of the connected network.

See also

Resistor, Conductor, Capacitor, Inductor, Impedance, Admittance, Variable resistor, Variable conductor, Variable capacitor, Variable inductor, Variable impedance

Parameters (6)

useHeatPort

Value: false

Type: Boolean

Description: =true, if heatPort is enabled

T

Value: T_ref

Type: Temperature (K)

Description: Fixed device temperature if useHeatPort = false

T_ref

Value: 293.15

Type: Temperature (K)

Description: Reference temperature

alpha_ref

Value: 0

Type: LinearTemperatureCoefficient (ยน/K)

Description: Temperature coefficient of resistance (R_actual = R_ref*(1 + alpha_ref*(heatPort.T - T_ref))

frequencyDependent

Value: false

Type: Boolean

Description: Consider frequency dependency, if true

f_ref

Value: 1

Type: Frequency (Hz)

Description: Reference frequency, if frequency dependency is considered

Connectors (4)

pin_p

Type: PositivePin

Description: Positive quasi-static single-phase pin

pin_n

Type: NegativePin

Description: Negative quasi-static single-phase pin

heatPort

Type: HeatPort_a

Description: Conditional heat port

Y_ref

Type: ComplexInput

Description: Variable complex admittance

Components (2)

v

Type: ComplexVoltage

Description: Complex voltage

i

Type: ComplexCurrent

Description: Complex current

Used in Components (1)

VariableAdmittance

Modelica.Electrical.QuasiStationary.MultiPhase.Basic

Multiphase variable admittance