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Single-switch converters can be an attractive solution for low-cost and low-power applications. This paper studies efficiency improvements from topology modifications of the single-switch galvanically isolated quasi-Z-source DC-DC converter. The following approaches were studied: synchronous rectification in the quasi-Z-source network, implementation of a voltage multiplier rectifier and the multidevice...
Modular power conditioning systems, where each PV module has its own power converter, have been proven to yield higher output power due to their superior maximum power point tracking capabilities. In PV strings the typical operating voltages pose reasonable electrical safety problems that can be overcome in conventional modules. For certain cell constructions, such as thin film arrays deposited onto...
A dual active bridge (DAB) converter promises high power density. The highest power transfer can be achieved by phase shift modulation inside the zero-voltage switching boundaries. This paper analyzes the transients of DAB commutation. Although commutation has been previously analyzed for DAB with the linear turn-off snubbers, in today's industries, the output capacitors of the switches are utilized...
In this paper, a design of high output power density 400/400V isolated dc/dc converter for power supply in data center is discussed. The isolated DC/DC converter uses the hybrid pair of SJ-MOSFET and SiC-SBD power devices. A high accuracy of DC/DC converter analysis is carried out by considering the intrinsic and extrinsic loss parameter of power devices and circuit board. Based on this analysis,...
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