Examples

These examples measure the mechanical impedance of machine drives and the output admittance of grid converters from motulator simulations by frequency sweeps.

Mechanical Impedance

These examples measure the mechanical impedance of machine drives, i.e., the dynamics of the machine and its control system as seen from the shaft [1].

References

[1]

Hartikainen, Tiitinen, Laine, Hinkkanen, “Identification of mechanical impedance of an electric machine drive for drivetrain design,” Proc. IEEE IEMDC, 2023, https://doi.org/10.1109/IEMDC55163.2023.10238992

45-kW IM, V/Hz control, mechanical impedance

45-kW IM, V/Hz control, mechanical impedance

Output Admittance

These examples measure the output admittance of grid converters [2].

References

[2]

Määttä, Kukkola, Seppänen, Hinkkanen, “Open-source Python tool for grid converter output admittance identification,” 2026, https://arxiv.org/abs/2607.10653

10-kVA, GFL, output admittance

10-kVA, GFL, output admittance

12.5-kVA, DO-GFM, output admittance

12.5-kVA, DO-GFM, output admittance