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A high-gain non-isolated DC-DC converter is proposed with a inversely coupled inductor and a voltage lift cell. Energy stored in the leakage inductance of the coupled inductor is recycled through a voltage lift cell to obtain high voltage conversion ratio. The operation of the proposed converter is explained using its equivalent circuits which are used to derive static gain expression. The operation...
A new non-isolated DC-DC converter for photovoltaic systems is proposed in this paper. This converter topology is characterized by an integration of the classical Boost and Ćuk DC-DC converters. The proposed topology requires only a single power semiconductor switch, reduces voltage stress across diodes and power semiconductor switch while providing a continuous input current. Further, this topology...
This paper presents a novel, non-isolated step-down converter for the application of point-of-load (POL) voltage regulation. The new converter can achieve higher power density by utilizing a much smaller inductor compared with Buck converter in the POL application. A smaller inductor is achieved by increasing the effective operating frequency applied to the inductor by a factor of 4 and at the same...
The paper compares generic on board charger module (OBCM) topologies with respect to ground fault current detection and interruption. Ground fault current in isolated charging modules is very small due to the galvanic isolation between the input and output sides. In non-isolated charging modules, the paper shows the contributing components of the system to the generation of ground fault current. The...
Grid-connected photovoltaic (GPV) using module-integrated-inverters is a well known method to use PVs in power networks. This paper proposes a novel structure of module-integrated GPV based on double input DC-DC converters. Special structure and switching strategy of the proposed converter result in high efficient power conditioning system for GPVs. The proposed structure of module-integrated GPV...
This study presents a novel topology named high voltage-gain boost DC-DC converter with tapped-inductor. The proposed topology provides a high voltage-gain and low input current ripple which are suitable for alternative power sources such as PV and fuel-cell applications. The interleaved control mode can be used to reduce input and output filtering. Moreover, the voltage stress on MOSFETs are clamped,...
Conventional switched mode power supplies (SMPSs) used in personal computers (PCs) are suffering from various power quality (PQ) problems such as high crest factor (CF), distorted and dense periodic input ac mains current with very low power factor (PF) and poor output voltage regulation. A non-isolated Sheppard-Taylor (S-T) converter in SMPS is proposed to mitigate these PQ problems and to maintain...
A high efficiency bidirectional dc-dc converter is proposed for energy storage systems. In the proposed bidirectional converter, a simple auxiliary circuit has been applied to provide soft switching at both modes of operation. By added a resonant cell, the converter can realize zero-voltage-transition (ZVT) where both the switch and the rectifier diode achieve soft condition without increasing their...
In order to reduce size of bidirectional DC-DC converter, conventional topologies using hard switching method operate with high frequency. As switching frequency is getting higher, switching loss is increased. Conventionally an auxiliary circuit is implemented by using soft switching method in order to overcome this drawback,. The switch of the auxiliary circuit, however, is operated as hard switching...
The buck-boost power factor corrected (PFC) converter has the wide range of the dc output voltage. A new non-isolated three-phase hard-switching buck-boost PFC converter and a new non-isolated three-phase soft-switching buck-boost PFC converter are proposed. Their structures are very compact and the low cost is achieved by removing the three-phase transformer. They are operated in the discontinuous...
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