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Distributed Generation has created the need for new types of smart dc grids developments. The multiple generation sources, bi-directional power flow, power flow time co-ordination and management bring significant benefits as well as challenges for current ac electrical grids and emerging dc microgrids. In particular, the effect of voltage weak distribution systems on protection concepts and approaches...
This paper proposes a finite element based method to compute rotor eddy-current losses in surface mounted PM machines. A surface current density boundary condition, obtained from static solutions of the full machine geometry, is applied to a model containing only the rotor. Unlike other similar methods, this method is not based on the assumption of resistively limited eddy-currents; it can account...
This paper presents an approach to the high power density design of high-current DC-DC converters which bears high transient load power. The transient thermal design of semiconductors to obtain the minimum cooling medium volume is proposed. Optimal dimensional design of the low-profile nanocrystalline transformer is also highlighted for achieving the minimized transformer loss in the steady state...
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