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An accurate power loss model for a high-efficiency dual active bridge converter, which provides a bidirectional electrical interface between a 12-V battery and a high-voltage (HV) dc bus in a fuel cell car, is derived. The nominal power is 2 kW, the HV dc bus varies between 240 and 450 V, and the battery voltage range is between 11 and 16 V. Consequently, battery currents of up to 200 A occur at nominal...
This paper studies the design of DC-DC Converter to convert low-voltage energy sources generated from renewable power like battery power, photovoltaic power, or fuel cells into high-voltage ones. The circuit topology of H-bridge converter to convert input voltage, 24 V, into out voltage, 270 V, was realized through applying phase shift angle control so as to manage electric power and voltage in the...
This paper presents modeling and simulation study of a fuel cell power system for ships. The paper reviews the ship's current power system and its limitations. A detailed discussion of the issues associated with integrating fuel cells to ships and power conditioning systems for fuel cells to overcome the limitations is also presented. A model of the fuel cell and an energy storage system to mitigate...
The buck-boost bi-directional DC-DC converter is at double sources application in the proposed fuel cell power system-DC bus at high voltage port and battery at low voltage port. Due to complemented operation of switches in buck-boost bi-directional DC-DC converter, traditional soft start method will give rise to large inverse inductor current from the output source, and result in damage of devices...
For fuel cells based power supplies, necessity for operation for a wide input range presents a problem for realizing synchronous rectification for achieving higher converter efficiency. A novel design scheme that allows synchronous rectification with isolated interleaved active clamp converter is introduced in this paper. It involves a pre-regulating buck converter for part of the fuel cell output...
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