About the Simulation Tool

The motor voltage simulation on this website is a simplified version of simulation tools developed at the University of Wisconsin-Madison for research into passive filters for motor protection. It is a tool to help users understand how motor drive waveforms interact with the cable and motor. Note that this simulation tool uses a simplified model of the cable and motor, and therefore may not be a completely accurate representation of the voltages in a real system.

About Integrated Filters

The integrated dv/dt filter was created at the Department of Electrical and Computer Engineering at the University of Wisconsin-Madison, within the Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC). This filter integrates the magnetic field of the inductor and the electric field of the capacitor into a common volume, allowing for a very compact dv/dt filter that can be integrated directly onto the output bus bars of the drive. More information on this concept can be found here and in the publications and patents listed below.


  • A. Schroedermeier and D. Ludois, “Integrated Inductors, Capacitors, and Damping in Bus Bars for dv/dt Filter Applications,” 2018 IEEE Applied Power Electronics Conference and Exposition (APEC), 2018. (Link)
  • A. Schroedermeier and D. Ludois, “An Integrated Inductor and Capacitor with Co-Located Electric and Magnetic Fields,” IEEE Trans. Industry Applications, 2016. (Link)


  • D. Ludois and A. Schroedermeier, “Integrated Capacitor and Inductor with Low Parasitic Inductance,” US9934903, 23-Apr-2018. (Link)
  • D. Ludois and A. Schroedermeier, “Bus Bar with Integrated Voltage Rise Time Filter,” US15658989, 31-Jan-2019. (Link)