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

Forschung im Ingenieurwesen, vol. 85, pp. 257–264

Abstract

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

Authors 6

1. Tobias Duda corresponding Aachen Chair for Wind Power Drives (CWD)

   RWTH Aachen University

   Affiliation as printed

   Chair for Wind Power Drives, RWTH Aachen University, 52074, Aachen, Germany

2. Christoph Mülder Aachen Institute of Electrical Machines (IEM)

   RWTH Aachen University

   Affiliation as printed

   Institute of Electrical Machines, RWTH Aachen University, 52062, Aachen, Germany

3. Georg Jacobs Aachen Chair for Wind Power Drives (CWD)

   RWTH Aachen University

   Affiliation as printed

   Chair for Wind Power Drives, RWTH Aachen University, 52074, Aachen, Germany

4. Kay Hameyer Aachen Institute of Electrical Machines (IEM)

   RWTH Aachen University

   Affiliation as printed

   Institute of Electrical Machines, RWTH Aachen University, 52062, Aachen, Germany

5. Dennis Bosse Aachen Chair for Wind Power Drives (CWD)

   RWTH Aachen University

   Affiliation as printed

   Chair for Wind Power Drives, RWTH Aachen University, 52074, Aachen, Germany

6. Martin Cardaun Aachen Chair for Wind Power Drives (CWD)

   RWTH Aachen University

   Affiliation as printed

   Chair for Wind Power Drives, RWTH Aachen University, 52074, Aachen, Germany