Switched-Capacitorized DC/DC Converters

2013 ◽  
Vol 310 ◽  
pp. 453-465
Author(s):  
Fang Lin Luo
Keyword(s):  
Power Density ◽  
High Power ◽  
Current Mode ◽  
Input Current ◽  
Switched Capacitor ◽  
High Power Density ◽  
Stored Energy ◽  
Switched Capacitors ◽  
Conversion Operation ◽  
Source Voltage

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 switched capacitors can be charged during the input current discontinuous period. The switched capacitors are charged to the source voltage during the switch-off period. They will join the conversion operation during switch-on period, and the stored energy in them will be delivered through further elements to the load. These converters are called switched-capacitorized DC/DC converters. Simulation and experimental results are provided for verification of this design.

Analysis of Current Mode in High Power Density Boost Converters with Magnetic Coupling

2016 ◽  
Vol 136 (10) ◽  
pp. 778-783
Author(s):  
Yasuo Sasaki ◽  
Yusuke Sugihara ◽  
Kimihiro Nanamori ◽  
Masayoshi Yamamoto
Keyword(s):  
Power Density ◽  
High Power ◽  
Magnetic Coupling ◽  
Current Mode ◽  
High Power Density ◽  
Boost Converters

An improved integrated control modeling of a high-power density interleaved non-inverting buck-boost DC-DC converter

2018 ◽  
Vol 15 (6) ◽  
pp. 688-699 ◽  
Author(s):  
Mohsen Karimi ◽  
Mohammad Pichan ◽  
Adib Abrishamifar ◽  
Mehdi Fazeli
Keyword(s):  
Power Density ◽  
High Power ◽  
Integrated Control ◽  
Input Current ◽  
High Power Density ◽  
Parallel Operation ◽  
Content Type ◽  
Two Stages ◽  
Conduction Mode ◽  
Current Ripple

PurposeThis paper aims to propose a novel integrated control method (ICM) for high-power-density non-inverting interleaved buck-boost DC-DC converter. To achieve high power conversion by conventional single phase DC-DC converter, inductor value must be increased. This converter is not suitable for industrial and high-power applications as large inductor value will increase the inductor current ripple. Thus, two-phase non-inverting interleaved buck-boost DC-DC converter is proposed.Design/methodology/approachThe proposed ICM approach is based on the theory of integrated dynamic modeling of continuous conduction mode (CCM), discontinuous conduction mode and synchronizing parallel operation mode. In addition, it involves the output voltage controller with inner current loop (inductor current controller) to make a fair balancing between two stages. To ensure fast transient performance, proposed digital ICM is implemented based on a TMS320F28335 digital signal microprocessor.FindingsThe results verify the effectiveness of the proposed ICM algorithm to achieve high voltage regulating (under 0.01 per cent), very low inductor current ripple (for boost is 1.96 per cent, for buck is 1.1) and fair input current balance between two stages (unbalancing current less than 0.5A).Originality/valueThe proposed new ICM design procedure is developed satisfactorily to ensure fast transient response even under high load variation and the solving R right-half-plane HP zeros of the CCM. In addition, the proposed method can equally divide the input current of stages and stable different parallel operation modes with large input voltage variations.

A High-Power-Density Converter With a Continuous Input Current Waveform for Satellite Power Applications

2020 ◽  
Vol 67 (2) ◽  
pp. 1024-1035 ◽  
Author(s):  
Nayoung Lee ◽  
Ju-Young Lee ◽  
Yee-Jin Cheon ◽  
Sang-Kyoo Han ◽  
Gun-Woo Moon
Keyword(s):  
Power Density ◽  
High Power ◽  
Input Current ◽  
High Power Density ◽  
Current Waveform ◽  
Continuous Input

scholarly journals A High Power Density Converter with a Continuous Input Current Waveform for Satellite Power Applications

2021 ◽  
Vol 9 (VI) ◽  
pp. 4523-4527
Author(s):  
Kema Vivek
Keyword(s):  
Power Density ◽  
High Power ◽  
Input Voltage ◽  
Input Current ◽  
High Power Density ◽  
Current Waveform ◽  
High Input ◽  
Voltage Stress ◽  
Continuous Input ◽  
Switch Voltage

Conventional Active Clamp-Forward topology is studied for a satellite converter owing to its comparitively simple structure, minimum number of components and fine clamping capability concerning its switch voltage stress. However, it has a high switch voltage stress,a high di/dt level and has pulsating input current shape. These are disadvantageous with respect to the EMI filter size and high input voltage converter applications.To get the better of these drawbacks, a new ACF topology with a continuous input current waveform is proposed . By this proposed waveform ,the voltage stresses on the main switches are relieved. This is crucial reliability of satelite FET switches, by utilizing a two series connected structure. These conditions will allow the proposed converter to serve as a high input voltage, high power density satellite converter.

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