Fault tolerant 24 KVA interleaved inverter

This paper focuses on the use of specific coupling transformer associations which allow easily improving the availability of power electronics converter based on interleaved structures. By using these structures, the system will continue working (with reduced output power) in case of power component failure. The paper focuses on the behaviour and the magnetic and electrical interconnection between the several coupling transformers and describes how, by shutting down some phases of the power electronic converter, it will be possible to ensure the systems operation. These structures are normally sized to work with a fixed number of phases. Our control strategy induces new constraints on magnetic component, especially saturation problems which will induce some modifications on the control strategy. Finally a 24kVA fault tolerant Power electronic converter driven by an FPGA and based on coupling transformers is presented with the experimental results.