The list below provides a status by work package for POCOL project
WP1 - Management - KOM held 21st Dec 2015; Project coordination & management on going.
WP2 - Product Description - Completed. First releases of required documents were produced by UNOTT and TFE.
WP3 - Preliminary Design - Completed. This preliminary design activity were achieved mainly by UNOTT and resulted in a mock up manufacturing and validation test activities. At the end of this phase (Feb 2017), conclusions from industrial partners (namely TFE) with the support of end user (AH) stated the academic optimal topology for DC-DC bidirectional converter proposed by UNOTT was not the best choice when all implementation and industrial constraints are evaluated.
WP4 - Critical Design - BeginninCompleted. Because of the conclusions of previous phase, an updated preliminary design activity had to be performed, led by TFE, including: architecture choice updating, design analysis, simulation activities including control stage design. Then a 3D CAD model was produced. An updated PDR occurred leading to a reject status, mainly because of weight and dimensions issues. A design optimization was conducted, focused on cooling optimization, volume and weight savings. In parallel, safety and reliability aspects were analysed and included in design requirements. A CDR was conducted in two phases : first phase in June 2018 in order to launch B1 manufacturing. Second phase in November 2018 to review all documentation linked to this milestone. All documents are up to date. CDR activity is closed
WP5 - B1 models - Completed. First power sub-assembly has been tested in both Buck and Boost mode, in open loop. The only weakness detected is the overheating of the power transformer. This power transformer will be improved for B2 model. A temperature sensor near the transformer has been added on first model in order to avoid damage due to this over-heating phenomenon. This model was delivered to AIRBUS after a Prototype Inspection in July 2019.
WP6 - TRL5 maturity testing - Started. Functional validation and verification versus specification was performed including thermal validation. EMC derisk was also performed
WP7 - AH Integration tests - Started. Model B1 has been delivered. Buck mode has been tested on Airbus test bench.
WP8 - Critical Design update - Completed. Main modification was the redesign of the power transformer for which a new design, fully proprietary, were studied. The purpose of this transformer was to reduce losses to improve thermal behavior using a planar technology
WP9 - B2 models - Started. Testing activity started with the new power transformer showing a 20°C improvement in temperature behavior, then a first power module was assembled and tested confirming the good results and non regression on other parameters. B2 model was fully assembled and tested.
WP10 - Flight clearance testing - Started with the test of firmware of complex component (FPGA). Equipment test procedure and associated report were released. The qualification test plan applicable for flight clearance has been agreed with AIRBUS.
