Conventionally, multiple power converters are needed to
convert power from manifold power sources [3-10]. Such a
simple solution is obviously of high cost and inefficient. To
cope with the requirement of the application with two power
sources, this paper proposes a novel three-port dc-to-dc
converter with only an active power switch. The three-port
power converter is capable of converting power from dual
sources to the load. The dual sources deliver power to the load
alternatively by switching the active power switch on and off.
The power converter can be utilized for the applications with
two different dc power sources, such as solar cells, fuel cells
and battery power systems.