Modelling electric drives and motors
Over the last years, electric power units are increasingly replacing engine-driven loads in cars. Different solutions to address rising electrical power requirements are being investigated, with a main focus on energy-efficient electric actuators. Within EMDA_LOOP(opens in new window) (Optimal low-noise energy-efficient electrical machines and drives for automotive applications), work was geared towards developing multiphysics models for simulating permanent-magnet synchronous motors (PMSMs) and switched reluctance motors (SRMs) at component level. Project work covered the whole spectrum of the modelling process – from early development to detailed design of components – considering all important aspects such as energy performance and management, safety, driving range, comfort and noise. In addition, researchers combined optimal design processes for hardware components with optimal control strategies at component and vehicle levels, allowing combined mechatronic optimisation of all aspects at once. Project partners designed models and a variety of design tools, including electromagnetic, mechanical, vibroacoustic and thermal. Two design and optimisation procedures – one for surface-mounted PMSMs and another for SRMs – were developed based on MATLAB code. The coupled analytical electromagnetic-vibroacoustic modelling tools for PMSMs and SRMs are complete. Partners carried out several analyses to study the interdependencies between PMSM and SRM electromagnetic and vibroacoustic designs. The multiphysics modelling environment is available through integration of the independent modules. The modules can be used either independently or coupled for any surface-mounted PMSM and SRM. Team members applied the optimal design in two cases: a clima-compressor (using SRM) and a light traction motor (using PMSM). Results were evaluated at system level. Work also included preparing the test benches for evaluating SRM and PMSM performance. EMDA_LOOP carried out several studies on PMSM vibroacoustic behaviour. The influence of different topologies, winding configurations and geometrical dimensions on the radial forces in PMSMs was considered. Project partners also filed two patents for two converter topologies that can enhance performance of both motor types. To disseminate project results, project members designed the project website, gave numerous presentations and hosted an exhibition stand at an international symposium. One paper was published in a peer-reviewed journal and more are on the way.
