G+L innotec Develops Fuel Cell Media Gap Motor
G+L innotec is developing a media gap motor as part of a collaborative project with other partners. The motor is intended to optimise the efficiency of the fuel cell and significantly extend its service life.
As part of their joint project, named "Recirculation blower development for fuel cell technology" (REZEBT), G+L innotec, The Institute of Turbomachinery and Fluid Dynamics (TFD) at the Leibniz University of Hannover (LUH), and The hydrogen and fuel cell center ZBT GmbH hope to develop a media gap motor (MGM) by 2022. This electric motor is characterised by a particularly large gap between the magnet and the coil. The medium passes directly through this gap in the motor, helping to cool the motor at the same time.
This design is intended to optimise the efficiency of the fuel cell and extend its service life. The MGM will firstly serve as the drive for the axial recirculation blower, where hydrogen is hermetically enclosed and transported without dynamic seals. It will secondly serve as an electric compressor to convey oxygen into the fuel cell and convey water out of it.
Media gap motor developed in the off-highway sector
Development service provider G+L innotec had already developed the MGM to provide electric assistance for turbochargers for combustion engines. Rolls-Royce Power Systems has now acquired the rights of use for off-highway combustion engines with more than 450 kW of power. The project is being funded by the Federal Ministry for Economic Affairs and Energy as part of the Central Innovation Programme for SMEs (ZIM).