Design of a 2-KW Transformerless Grid Tie Inverter Using High Frequency Boost Converter

2021 ◽  
Author(s):  
Md. Iftadul Islam Sakib ◽  
Mohammad Rejwan Uddin ◽  
Khan Farhan Ibne Faruque ◽  
Khosru M Salim
Keyword(s):  
High Frequency ◽  
Boost Converter

scholarly journals HIGH FREQUENCY BOOST CONVERTER EMPLOYING SOFT SWITCHING AUXILIARY RESONANT CIRCUIT

2013 ◽  
pp. 262-267
Author(s):  
G. NARESH GOUD ◽  
Y. LAKSHMI DEEPA ◽  
G.DILLI BABU ◽  
P. RAJASEKHAR ◽  
N. GANGADHER
Keyword(s):  
Theoretical Analysis ◽  
High Frequency ◽  
Boost Converter ◽  
Soft Switching ◽  
Resonant Circuit ◽  
Switching Converter ◽  
Turn On ◽  
Switching Losses ◽  
Resonant Inductor ◽  
Switching Method

A new soft-switching boost converter is proposed in this paper. The conventional boost converter generates switching losses at turn ON and OFF, and this causes a reduction in the whole system’s efficiency. The proposed boost converter utilizes a soft switching method using an auxiliary circuit with a resonant inductor and capacitor, auxiliary switch, and diodes. Therefore, the proposed soft-switching boost converter reduces switching losses more than the conventional hard-switching converter. The efficiency, which is about 91% in hard switching, increases to about 97% in the proposed soft-switching converter. In this paper, the performance of the proposed soft-switching boost converter is verified through the theoretical analysis, simulation, and experimental results.

A High Temperature, Fast Switching SiC Multi-chip Power Module (MCPM) for High Frequency (> 500 kHz) Power Conversion Applications

2013 ◽  
Vol 2013 (HITEN) ◽  
pp. 000056-000060 ◽  
Author(s):  
Z. Cole ◽  
B. S. Passmore ◽  
B. Whitaker ◽  
A. Barkley ◽  
T. McNutt ◽  
...  
Keyword(s):  
High Temperature ◽  
High Frequency ◽  
Power Conversion ◽  
Three Dimensional ◽  
Boost Converter ◽  
Switching Frequency ◽  
Power Module ◽  
Element Analysis ◽  
Switching Characteristics ◽  
Three Dimensional Finite Element

In high frequency power conversion applications, the dominant mechanism attributed to power loss is the turn-on and -off transition times. To this end, a full-bridge silicon carbide (SiC) multi-chip power module (MCPM) was designed to minimize parasitics in order to reduce over-voltage/current spikes as well as resistance in the power path. The MCPM was designed and packaged using high temperature (> 200 °C) materials and processes. Using these advanced packaging materials and devices, the SiC MCPM was designed to exhibit low thermal resistance which was modeled using three-dimensional finite-element analysis and experimentally verified to be 0.18 °C/W. A good agreement between the model and experiment was achieved. MCPMs were assembled and the gate leakage, drain leakage, on-state characteristics, and on-resistance were measured over temperature. To verify low parasitic design, the SiC MCPM was inserted into a boost converter configuration and the switching characteristics were investigated. Extremely low rise and fall times of 16.1 and 7.5 ns were observed, respectively. The boost converter demonstrated an efficiency of > 98.6% at 4.8 kW operating at a switching frequency of 250 kHz. In addition, a peak efficiency of 96.5% was achieved for a switching frequency of 1.2 MHz and output power of 3 kW.

Modeling and stability study of a high frequency and high efficiency photovoltaic DC boost converter

2020 ◽  
Vol 20 (3) ◽  
pp. 817-826
Author(s):  
Shengshan Li ◽  
Ming Li ◽  
Liangliang Liu
Keyword(s):  
Power Generation ◽  
High Frequency ◽  
Output Voltage ◽  
High Efficiency ◽  
Boost Converter ◽  
Stability Study ◽  
Power Circuit ◽  
Point Tracking ◽  
Photovoltaic Power ◽  
Power Generation Systems

Many practical photovoltaic power generation systems with higher output voltage levels rely on photovoltaic DC boost converters with high frequency and high efficiency, which performance directly affect the conversion efficiency of photovoltaic power generation systems. This paper investigates a high-frequency and high-efficiency photovoltaic DC boost converter, which adopts the Boost full-bridge isolation circuit topology with active clamps. The conductance increment method is used as the maximum power point tracking algorithm. The small signal models of its power circuit and control circuit are established to obtain the system model and analyze its stability. The simulation results indicate that the ripple coefficient of output current is less than 3%, and the ripple coefficient of output voltage is less than 5%, which meets the stability requirements.

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