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Conventional dc--dc converters are unable to provide very high step-down conversion ratio due to the inherent limitation of power switches and rectifier diodes in turning on and off instantaneously. Since utilization of transformers to make high conversion ratio imposes efficiency obstacle, more efficient transformerless converters have been proposed. With transformerless hybrid converters high step-down...
This paper presents the analysis and novel controller design for a hybrid switched-capacitor bidirectional dc/dc converter that is applicable for hybrid electric vehicle (HEV)/plug-in HEV energy-storage system (ESS) applications, based on the power of the traction motor and the gradient of the battery current. Features of voltage step-down, voltage step-up, and bidirectional power flow are integrated...
In this paper, authors propose a coupled inductor bidirectional converter, and design of classical PI controllers in voltage mode control. The proposed converter has the high voltage diversity which enables battery module of low voltage to be interfaced with the high-voltage dc bus or the micro grid for subsequent utilization. The working principles, design guidelines, and PI based voltage controller...
This paper describes the design of a fuzzy logic controller using voltage output as feedback for significantly improving the dynamic performance of boost dc-dc converter by using MATLAB@Simulink software. The objective of this proposed methodology is to develop fuzzy logic controller on control boost dc-dc converter using MATLAB@Simulink software. The fuzzy logic controller has been implemented to...
This paper presents the detailed analysis and novel hybrid controller design for bidirectional energy management solutions, using smart power electronic DC/DC converter solutions. More specifically, an intelligently designed novel digital control technique is presented for 4-quadrant (4Q) switched-capacitor (SC) Luo DC/DC converters, based on power of traction motor and gradient of battery current...
The paper focuses on a high efficiency Zero Voltage Transition (ZVT) DC-DC full-bridge converter using a high-frequency transformer. A novel structure with recovery of energy on load side is proposed. Such solution is particularly suitable for photovoltaic applications which require low losses and cannot recovery energy on source side. Moreover, a suitable architecture of snubber circuit that permits...
This paper presents a novel interleaved and isolated DC to DC buck converter with high voltage ratio. The converter consists of a half-bridge converter and a forward converter which are connected in parallel with a common load. As being one of interleaved DC to DC converters, it has smaller output current ripples within wide duty ratio, and it also has isolated input/output parts and higher voltage...
Switched converter (SC) DC/DC converters are new prototype of DC/DC Conversion technology. Since switched capacitor can be integrated into a power IC chip, consequently, these converters have small size and high power density. Switched capacitor can be used in voltage-lift technique to construct DC/DC converters. The clue is that for the converters operating in input current discontinuous mode (ICDM)...
Switched capacitor DC/DC converters are new prototype of DC/DC Conversion technology. Since switched capacitor can be integrated into a power IC chip, consequently, these converters have small size and high power density. Switched capacitor can be used in voltage-lift technique to construct DC/DC converters. The clue is that for the converters operating in discontinuous input current mode (DICM) the...
The paper is concerned with new resonant converter configurations, belonging to the previously published dual channel dc-dc converter family. On one hand, the new configurations solve a significant shortcoming of the original ones, namely, the output midpoint potential was floating in comparison with the input midpoint. This caused a high-frequency oscillation of the output midpoint, often significantly...
In this paper, a regulated dual phase charge pump with switched-capacitor voltage reference is presented. This charge pump uses a dual phase technique to reduce the output ripple and combines the switch-capacitor CMOS voltage reference to diminish the chip area and quiescent current. This charge pump provides output voltage 5 V and maximum load current 5 mA with the constant frequency regulation....
An on-chip buck converter with 3D chip stacking is proposed and the operation is experimentally verified. The manufactured converter achieves a maximum power efficiency of 62% for an output current of 70mA with a switching frequency of 200MHz and a 2x2mm on-chip LC output filter in 0.35mum CMOS. The use of glass epoxy interposer to increase the maximum power efficiency up to 71.3%, and the power efficiency...
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