Impedance Analysis And Topology Selection In Standardization For Middle Power Level DC/DC Converters

Design for standardized Integrated Power Electronic Modules (IPEM) and ensuring the stability of the system integrated by the IPEMs are the most important tasks in the Power Electronic System Integration study.The main reason for the instability of an integrated system is the poor match of the impedances of the modules. To ensure the stability of an integrated system, it's needed to increase the input impedance and decrease the output impedance of the modules as much as possible. The impedances of voltage mode DC/DC converters (in both CCM and DCM operations) and current mode DC/DC converters are discussed, modeled and experimentally measured. The dissertation also verified the methods proposed previously to improve the impedances of these converters.To design IPEMs, the topology that fits the application best should be properly selected first. Targeting at the applications for middle power DC/DC converters in the marketing, by analysis and comparison, eleven topologies as the candidate topologies for IPEMs are selected from numerous topologies (mainly the full bridge topologies). In this dissertation, six prototypes of them are built, comparison and evaluation are described.