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This paper presents high-efficiency standby forward converter integrated with the DC/DC Phase-Shift Full Bridge (PSFB) converter. By sharing one leg of DC/DC PSFB converter, the proposed converter features low-voltage stress, no snubber and zero-voltage switching (ZVS) over the entire load range. Thus, the proposed converter has high-efficiency, especially under half load condition. Furthermore, by...
A new interleaved buck converter (IBC) having low switching losses and improved step-down conversion ratio is proposed in this paper. It is similar to a conventional IBC, but two active switches are connected in series, and a coupling capacitor is employed in the power path, like Cúk, Sepic, and Zeta converters. The proposed IBC shows that since the voltage stress across all active switches is half...
In this paper, a new battery equalizer applying two-switch flyback topologies is proposed. Since the proposed circuit is based on two-switch flyback structure, voltage stress on the switches can be clamped at the battery stack voltage level. Furthermore, the number of active devices is minimized by using a common switch and a common clamping diode. The operational principle, theoretical analysis,...
This paper proposes a modularized two-stage charge equalization converter for a series-connected lithium-ion battery string in an HEV. In this paper, the series-connected battery sting is modularized into M modules, and each module has K cells in series. With this modularization, low voltage stress on the electronic devices can be achieved. A two-stage dc-dc converter with cell selection switches...
This paper proposes the modularized charge equalization converter for hybrid electric vehicle (HEV) lithium-ion battery cells, in which the intra-module and the inter-module equalizer are implemented. Considering the high voltage HEV battery pack, approximately above 300 V, the proposed equalization circuit modularizes the entire M*N cells; in other words, M modules in the string and N cells in each...
A new voltage doubler rectified boost-integrated half bridge converter for digital car audio amplifiers is proposed. The proposed converter shows low conduction loss due to low voltage stress of the secondary diodes, no dc magnetizing current for the transformer, and a lack of stored energy in the transformer. Moreover, since the primary MOSFETs are turned-on under zero voltage switching conditions...
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