Integration of electromagnetic finite element models in a multibody simulation to evaluate vibrations in direct-drive generators

Abstract This paper introduces a novel electromechanical model for calculating electromagnetic excited structural vibrations and structure borne acoustics gearless wind turbines. Therefore, the turbine is explained drivetrain derived to investigate decoupled from aerodynamic excitations. The fed with results an finite element of generator considering air gap width changes torque speed characteristics. Furthermore, exemplary ramp-up simulated. It can be seen, that oscillations are during certain rotational speeds, which may relevant acoustic behavior turbine.