Universal acoustic modelling framework for electrical drives

This presentation describes a universal acoustic modelling process for the efficient, high-quality acoustic modelling of electrical drives. It combines the two fast and user-interactive steps: system simulation and vibration synthesis. The underlying model parameters are obtained via automated offline finite-element simulations based on generic input parameters. This allows the use of complex electromagnetic and structural models without the computation time becoming prohibitive. The approach can be applied to all types of machines, including outer-rotor and transversal-flux machines as well as machines with rotor or stator skew. Switching frequencies and spatial machine harmonics are routinely taken into account. Sound radiation or transfer path analyses can be added. Analytical or measured models can also be used. This makes it a universal acoustic modelling framework for electrical drives. Application examples are given for a permanent-magnet synchronous machine traction drive for a hybrid electric vehicle as well as for a switched-reluctance auxiliary drive. Simulated run-up spectrograms for structure-borne sound are validated against measurements, and operational deflections are presented.