scholarly journals Comprehensive Analysis of a High-Power Density Phase-Shift Full Bridge Converter Highlighting the Effects of the Parasitic Capacitances

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1439
Author(s):  
Dorin Petreus ◽  
Radu Etz ◽  
Toma Patarau ◽  
Ionut Ciocan
Keyword(s):  
Phase Shift ◽  
Power Density ◽  
High Power ◽  
Comprehensive Analysis ◽  
Time Interval ◽  
High Power Density ◽  
Switching Cycle ◽  
Stray Capacitance ◽  
Bridge Rectifier ◽  
Conduction Mode

A phase-shift full bridge converter is analyzed in detail in continuous conduction mode for one switching cycle for both the leading and lagging legs of the primary bridge. The objective of the study is to determine how the stray capacitance of the transformer, and the capacitances of the diodes in the bridge rectifier affect the converter functionality. Starting from some experimental results, Laplace equivalent circuit models and describing equations are derived for each significant time interval during the switching cycle and are validated through simulations and experimental measurements. The resulting equations are of great interest in the high-power density domain because they can be used to design a clamping circuit for the output rectifier bridge accurately.

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 Modular-Designed Three-Phase High-Efficiency High-Power-Density EV Battery Charger Using Dual/Triple-Phase-Shift Control

2018 ◽  
Vol 33 (9) ◽  
pp. 8091-8100 ◽  
Author(s):  
Juncheng Lu ◽  
Kevin Bai ◽  
Allan Ray Taylor ◽  
Guanliang Liu ◽  
Alan Brown ◽  
...  
Keyword(s):  
Phase Shift ◽  
Power Density ◽  
High Power ◽  
High Efficiency ◽  
High Power Density ◽  
Battery Charger ◽  
Shift Control ◽  
Three Phase

Welding with high brilliance lasers and high power density

2010 ◽  
Author(s):  
Andreas Patschger ◽  
Markus Franz ◽  
Jens Bliedtner ◽  
Jean Pierre Bergmann
Keyword(s):  
Power Density ◽  
High Power ◽  
High Power Density
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