Main Content

Machine Plotting and Display Options

Use the Electrical menu on the block context menu to perform plotting and display actions for certain blocks in the Simscape™ Electrical™Electromechanical sublibrary. For example, you can plot torque versus speed for the Induction Machine Wound Rotor block, either in SI or per-unit units.

Using other options on the Electrical menu, you can display values in per-unit or display base parameter values in the MATLAB® Command Window. These options enable you to initialize and tune your three-phase machine quickly.

Asynchronous Machine Options

The context menus of certain asynchronous machine blocks contain some or all of these options:

  • Display Base Values — Displays the machine per-unit base values in the MATLAB Command Window.

  • Plot Torque Speed (SI) — Plots torque versus speed, both measured in SI units, in a MATLAB figure window using the present machine parameters.

  • Plot Torque Speed (pu) — Plots torque versus speed, both measured in per-unit, in a MATLAB figure window using the present machine parameters.

  • Plot Open-Circuit Saturation — Plots terminal voltage versus no-load stator current, both in per-unit, or, for SI blocks, in V and A, respectively, in a MATLAB figure window. The plot contains three traces:

    • Unsaturated

    • Saturated

    • Derived

  • Plot Saturation Factor — Plots saturation factor applied to magnetic inductance versus magnetic flux linkage in per-unit, or for SI blocks, in Wb, in a MATLAB figure window.

  • Plot Saturated Inductance — Plots magnetizing inductance versus per-unit magnetic flux linkage, both in per-unit, or, for SI blocks, in H and Wb, respectively, in a MATLAB figure window.

Induction Machine Options

The context menus of certain induction machine blocks contain some or all of these options for displaying the associated values in the MATLAB Command Window:

  • Display Base Values — Displays the machine per-unit base values in the MATLAB Command Window

  • Display Associated Base Values — Displays the associated per-unit base values in the MATLAB Command Window.

  • Display Associated Initial Conditions — Displays the associated initial condition values in the MATLAB Command Window.

  • Plot Open-Circuit Saturation (pu) — Plots air-gap voltage, Vag, versus field current, ifd, both measured in per-unit, in a MATLAB figure window. The plot contains three traces:

    • Unsaturated — Stator d-axis mutual inductance (unsaturated), Ladu you specify

    • Saturated — Per-unit open-circuit lookup table (Vag versus ifd) you specify

    • Derived — Open-circuit lookup table (per-unit) derived from the Per-unit open-circuit lookup table (Vag versus ifd) you specify. This data is used to calculate the saturation factor, Ks, versus magnetic flux linkage, ψat, characteristic.

  • Plot Saturation Factor (pu) — Plots saturation factor, Ks, versus magnetic flux linkage, ψat, both measured in per-unit, in a MATLAB figure window using the present machine parameters. This value is derived from parameters you specify:

    • Stator d-axis mutual inductance (unsaturated), Ladu

    • Per-unit field current saturation data, ifd

    • Per-unit air-gap voltage saturation data, Vag

Machine Inertia Block Options

For the Machine Inertia block, you can display the inertia parameters and base values using the Electrical menu on the block context menu. The block displays parameter values in the MATLAB Command Window.