Impedance Calculator

(To be removed) Compute impedance versus frequency of Impedance Measurement blocks in model

Since R2021b

The Specialized Power Systems library will be removed in R2026a. Use the Simscape™ Electrical™ blocks and functions instead. For more information on updating your models, see Upgrade Specialized Power System Models to use Simscape Electrical Blocks.

Description

The Impedance Calculator app uses the power_zmeter function to compute the impedance versus frequency of the Impedance Measurement blocks in your model.

Open the Impedance Calculator App

• MATLAB^® command prompt: Enter powerImpedance(sys), where sys is a string scalar or character vector that is the name of a model.

• powergui block: Under Tools, click Impedance Calculator.

Parameters

Model — Name of model

no default

Name of the model under analysis. Enter the name of a model to analyze, then click Update.

Update — Display or update

button

Display or update the impedance versus frequency measurement for the model specified in the Model parameter. Click this button when you want the app to take into account any change made to the model. Any previously selected block and displayed frequency response are cleared from the app.

Impedance Measurement blocks — Lists Impedance Measurement blocks

no default

Lists the Impedance Measurement blocks in the model. Select the blocks for which you want to obtain the frequency response. Press Ctrl to select several impedances to display on the same plot.

Impedance Axis — Choose logarithmic or linear scale

Logarithmic (default) | Linear

Choose logarithmic or linear scale for the vertical impedance scale.

Frequency Axis — Choose logarithmic or linear scale

Logarithmic (default) | Linear

Choose logarithmic or linear scale for the horizontal frequency scales.

Range — Frequency vector

[1:2:500] (default) | vector

Frequency vector, in hertz. You can specify any valid MATLAB expression that defines a vector of frequencies; for example, 0:2:1000 or linspace(0,1000,500).

Save selected Impedance Measurement block data to workspace — Save data in variable

off (default) | on

Select to save the data in a variable in the workspace. The name of the variable is defined by the Variable name parameter. The data is saved in the workspace every time you select the Impedance Measurement block in the list.

Variable name — Name of variable

Zdata (default) | string

Name of the variable to save in the workspace.

Dependencies

To enable this parameter, select Save selected Impedance Measurement block data to workspace.

Version History

Introduced in R2021b