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

The admittance model represents a parallel connection of a resistor and either a capacitor or inductor in each phase.

The linear admittance connects the complex voltage v with the complex current i by v*Y = i in each phase, using m variable single-phase admittances. The admittances Y_ref = G_ref + j*B_ref are given as complex input signals, representing the resistive and reactive components of the input admittances. The resistive components are modeled temperature dependent, so the real part G_actual = real(Y) are determined from the actual operating temperatures and the reference input conductances real(Y_ref). Conditional heat ports are considered. The reactive components B_actual = imag(Y) are 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 susceptances B_actual are proportional to f/f_ref

(b) imag(Y_ref) < 0: inductive case

The actual susceptances B_actual are proportional to f_ref/f

Note

Zero crossings of the real or imaginary parts of the admittance signals Y_ref could cause singularities due to the actual structure of the connected network.

See also

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

m	Value: 3 Type: Integer Description: Number of phases
mh	Value: m Type: Integer Description: Number of heatPorts=number of phases
useHeatPort	Value: false Type: Boolean Description: = true, if all heat ports are enabled
T	Value: T_ref Type: Temperature[mh] (K) Description: Fixed device temperatures if useHeatPort = false
T_ref	Value: fill(293.15, m) Type: Temperature[m] (K) Description: Reference temperatures
alpha_ref	Value: zeros(m) Type: LinearTemperatureCoefficient[m] (¹/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