Motor Control EMC Simulation

Andreas Barchanski is the EMC Market Development Manager at CST. He holds an M.Sc. degree in physics and a Ph.D. in numerical electromagnetics from the Technical University Darmstadt. He joined CST as an application engineer in 2007. Besides EMC, his main interest lies in the simulation of various electronic systems ranging from high speed digital to power electronics.

A variable frequency drive uses a varying frequency and voltage signal to control the speed and torque of a motor. It promises an excellent control performance and energy savings up to 20% when compared to traditional driving techniques. However the fast switching of high currents is well known to create EMC issues and leads to the need of filtering the switching circuit. In this webinar, we show how the EMC performance of a control system for an automotive motor can be simulated. For this task we have coupled a full-wave 3D analysis to a switching circuit. The simulation results are directly compared to measurements of prototypes and show an excellent agreement.