VariableImpedance
Single phase variable impedance
Library
Modelica/Electrical/QuasiStationary/SinglePhase/Basic
Description
The impedance model represents a series connection of a resistor and either an inductor or capacitor.
The linear impedance connects the complex voltage v with the
complex current i by i*Z = v.
The impedance Z_ref = R_ref + j*X_ref is given as complex input signal, representing the
resistive and reactive component of the input impedance. The resistive
component is modeled temperature dependent, so the real part R_actual = real(Z) is determined from
the actual operating temperature and the reference input resistance real(Z_ref).
The reactive component X_actual = imag(Z)
is 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 reactance
X_actualis proportional tof/f_ref - (b)
imag(Z_ref) < 0: capacitive case - The actual reactance
X_actualis proportional tof_ref/f
Note
A zero crossing of the real or imaginary part of the impedance signal Z_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 admittance
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_T_ref | T_ref | Reference temperature | Scalar | |
mo_alpha_ref | alpha_ref | Temperature coefficient of resistance (R_actual = R_ref*(1 + alpha_ref*(heatPort.T - T_ref)) | Scalar | |
mo_useHeatPort | useHeatPort | =true, if heatPort is enabled | Number | 0 |
mo_T | T | Fixed device temperature if useHeatPort = false | Scalar | |
mo_frequencyDependent | frequencyDependent | Consider frequency dependency, if true | Scalar | true |
mo_f_ref | f_ref | Reference frequency, if frequency dependency is considered | Scalar |
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
mo_abs_v | abs_v | abs_v | Structure | |
mo_abs_v/fixed | fixed | Cell of scalars | true | |
mo_abs_v/start | start | Cell of scalars | ||
mo_arg_v | arg_v | arg_v | Structure | |
mo_arg_v/fixed | fixed | Cell of scalars | true | |
mo_arg_v/start | start | Cell of scalars | ||
mo_abs_i | abs_i | abs_i | Structure | |
mo_abs_i/fixed | fixed | Cell of scalars | true | |
mo_abs_i/start | start | Cell of scalars | ||
mo_arg_i | arg_i | arg_i | Structure | |
mo_arg_i/fixed | fixed | Cell of scalars | true | |
mo_arg_i/start | start | Cell of scalars | ||
mo_P | P | P | Structure | |
mo_P/fixed | fixed | Cell of scalars | true | |
mo_P/start | start | Cell of scalars | ||
mo_Q | Q | Q | Structure | |
mo_Q/fixed | fixed | Cell of scalars | true | |
mo_Q/start | start | Cell of scalars | ||
mo_S | S | S | Structure | |
mo_S/fixed | fixed | Cell of scalars | true | |
mo_S/start | start | Cell of scalars | ||
mo_pf | pf | pf | Structure | |
mo_pf/fixed | fixed | Cell of scalars | true | |
mo_pf/start | start | Cell of scalars | ||
mo_omega | omega | omega | Structure | |
mo_omega/fixed | fixed | Cell of scalars | true | |
mo_omega/start | start | Cell of scalars | ||
mo_LossPower | LossPower | LossPower | Structure | |
mo_LossPower/fixed | fixed | Cell of scalars | true | |
mo_LossPower/start | start | Cell of scalars | ||
mo_T_heatPort | T_heatPort | T_heatPort | Structure | |
mo_T_heatPort/fixed | fixed | Cell of scalars | true | |
mo_T_heatPort/start | start | Cell of scalars | ||
mo_R_actual | R_actual | R_actual | Structure | |
mo_R_actual/fixed | fixed | Cell of scalars | true | |
mo_R_actual/start | start | Cell of scalars | ||
mo_X_actual | X_actual | X_actual | Structure | |
mo_X_actual/fixed | fixed | Cell of scalars | true | |
mo_X_actual/start | start | Cell of scalars | ||
mo_R_ref | R_ref | R_ref | Structure | |
mo_R_ref/fixed | fixed | Cell of scalars | true | |
mo_R_ref/start | start | Cell of scalars | ||
mo_X_ref | X_ref | X_ref | Structure | |
mo_X_ref/fixed | fixed | Cell of scalars | true | |
mo_X_ref/start | start | Cell of scalars |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
pin_p | implicit | Positive quasi-static single-phase pin | input | 1 |
pin_n | implicit | Negative quasi-static single-phase pin | output | 1 |
Z_ref | implicit | Variable complex impedance | input | 2 |
Port 4 | implicit | Conditional heat port | input | mo_useHeatPort |