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

The impedance model represents a series connection of a resistor and either an inductor or capacitor in each phase.

The linear impedance connects the voltage v with the current i by v = Z*i in each phase, using m singlephase impedances. The resistive components are modeled temperature dependent, so the real parts R_actual = real(Z) are determined from the actual operating temperatures and the reference input resistances real(Z_ref). Conditional heat ports are considered. The reactive components X_actual = imag(Z) are equal to imag(Z_ref) if frequencyDependent = false. Frequency dependency is considered by frequencyDependent = true, distinguishing two cases:

(a) imag(Z_ref) > 0: inductive case

The actual reactances X_actual are proportional to f/f_ref

(b) imag(Z_ref) < 0: capacitive case

The actual reactances X_actual are proportional to f_ref/f

See also

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

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
Z_ref	Value: Type: ComplexImpedance[m] Description: Complex impedances R_ref + j*X_ref
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