An Embedded Half-Bridge Γ-Z-Source Inverter with Reduced Voltage Stress on Capacitors

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6433
Author(s):  
Hamed Mashinchi Maheri ◽  
Dmitri Vinnikov ◽  
Mohsen Hasan Babayi Nozadian ◽  
Elias Shokati Asl ◽  
Ebrahim Babaei ◽  
...  
Keyword(s):  
High Voltage ◽  
Power Loss ◽  
Low Voltage ◽  
Voltage Gain ◽  
Correct Operation ◽  
Operating Modes ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Boost Factor ◽  
Zero Voltage

In this paper, an embedded half-bridge Z-source inverter based on gamma structure is proposed. In contrast with the classical half-bridge inverter, the proposed inverter can generate zero voltage levels in output. High voltage gain and low voltage stress on capacitors are the main advantages of the proposed converter. The value of the boost factor in the proposed structure is increased by changing both the shoot-through (ST) duty cycle and turns ratio of the transformer. The operating principle of the proposed converter in four operating modes is presented. We also calculate the critical inductance and compare the proposed converter with conventional topologies. In addition, power loss and THD analysis are presented. Finally, PSCAD/EMTDC software is used to verify the correct operation of the proposed inverter and the experimental results.

scholarly journals High Step-up Coupled Inductor Inverters Based on qSBIs

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3032 ◽  
Author(s):  
Hongchen Liu ◽  
Xi Su ◽  
Junxiong Wang
Keyword(s):  
Steady State ◽  
High Voltage ◽  
Low Voltage ◽  
Duty Ratio ◽  
Voltage Gain ◽  
Passive Components ◽  
Steady State Analysis ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Working Principle

In this paper, two types of high step-up coupled inductor inverters based on qSBIs (quasi- switched boost inverters) are proposed. By applying the coupled inductor to the qSBIs, the voltage gain of the proposed inverter is regulated by turn ratio and duty ratio. Thus, a high voltage gain can be achieved without the circuits operating at the extreme duty cycle by choosing a suitable turn ratio of the coupled inductor. In addition, the proposed circuits have the characteristics of continuous input current and low voltage stress across the passive components. A boost unit can be added to the proposed inverters for further improvement of the voltage gain. In this paper, the working principle, steady state analysis, and the comparisons of the proposed inverter with other impedance-source inverters are described. A 200 W prototype was created and the experimental results confirm the correctness of the analysis in this paper.

scholarly journals A Modified High Voltage Gain SEPIC Based DC-DC Converter with Continuous Conduction Mode

2020 ◽  
Vol 6 (12) ◽  
pp. 268-274
Author(s):  
G.Vijaykumar and Dr.V.Geetha
Keyword(s):  
High Voltage ◽  
High Efficiency ◽  
Input Voltage ◽  
Voltage Gain ◽  
Pv System ◽  
Operating Modes ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
High Output Voltage ◽  
High Output

A high voltage gain modified SEPIC converter is proposed in this paper. This proposed converter has many advantages i.e., high output voltage, lower voltage stress, high efficiency, voltage gain is high without any coupled inductor and transformer, continuous input current. Thus, there is no overshoot voltage at turn-off process for switches. By using single switches, the CCM mode operation can be easily controlled by this converter, so control system is simple and also wide output values is obtained only by modifying the duty cycle. This modified converter has lower components than conventional converter. The operating modes and design of modified converter are discussed. The output power of this converter is 6 watts. By this converter, this converter capable of developing the two and half times of input voltage. The PV system also used this converter to develop high voltage gain. This high voltage gain is achieved by using MATLAB/SIMULIMK platform.

A Novel Nonisolated Ultra-High-Voltage-Gain DC–DC Converter With Low Voltage Stress

2017 ◽  
Vol 64 (4) ◽  
pp. 2809-2819 ◽  
Author(s):  
Yong Cao ◽  
Vahid Samavatian ◽  
Kaveh Kaskani ◽  
Hamidreza Eshraghi
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Ultra High Voltage

scholarly journals Single-switch high-efficiency hybrid boost–Ćuk DC/DC converter with high-voltage gain and low-voltage stress

2020 ◽  
Vol 13 (12) ◽  
pp. 2538-2546
Author(s):  
António Manuel Santos Spencer Andrade ◽  
Tiago Miguel Klein Faistel ◽  
Ronaldo Antonio Guisso
Keyword(s):  
High Voltage ◽  
High Efficiency ◽  
Low Voltage ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Voltage Stress

scholarly journals High Gain DC-DC Converter Integrating Dickson Charge Pump with Coupled Inductor Technique

2021 ◽  
Vol 7 (6) ◽  
pp. 272-277
Author(s):  
P. Nithin and Dr. R. Rajeswari
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
High Gain ◽  
Voltage Gain ◽  
Power Switch ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Input Side ◽  
State Resistance ◽  
Current Ripple

In this paper, a novel high voltage gain DC-DC converter based on coupled inductor and voltage multiplier technique is proposed. The benefits of the proposed converter are ultra-high voltage gain, low voltage stress across the power switch and very low input current ripple by employing a low current ripple structure (LCR) at the input side. A low on state resistance (RDS(on)) of the power switch can be employed since the voltage stress is a maximum of 25% of the output voltage and the conduction losses of the switch is also reduced. Design of a 1.9kW, 48V at the low voltage side and 430V at the high voltage side is done and verified by simulation. Simulation results show an efficiency of over 93% when operating in continuous conduction mode (CCM).

scholarly journals A Soft-Switched DC/DC Converter Using Integrated Dual Half-Bridge with High Voltage Gain and Low Voltage Stress for DC Microgrid Applications

Inventions ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 63 ◽  
Author(s):  
Hadi Moradisizkoohi ◽  
Nour Elsayad ◽  
Osama Mohammed
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Renewable Energy Sources ◽  
Voltage Gain ◽  
Switching Loss ◽  
Output Stage ◽  
Dc Microgrid ◽  
Analysis And Design ◽  
High Voltage Gain ◽  
Voltage Stress

In this paper, a soft-switched boost converter including an integrated dual half-bridge circuit with high voltage gain and continuous input current is introduced that can be suitable for the applications requiring a wide voltage gain range, such as for the front-end of the inverter in a DC microgrid to integrate renewable energy sources (RES). In the proposed converter, two half-bridge converters are connected in series at the output stage to enhance the voltage gain. Additionally, the balanced voltage multiplier stage is employed at the output to increase the voltage conversion ratio, as well as distribute the voltage stress across semiconductors; hence, switches with smaller on-resistance RDS(on) can be adopted resulting in an improvement in the efficiency. The converter takes advantage of the clamp circuit not only to confine the voltage stress of switches, but also to achieve the soft-switching, which leads to a reduction in the switching loss as well as the cost. The mentioned features make the proposed converter a proper choice for interfacing RES to the DC-link bus of the inverter. The operation modes, steady-state analysis, and design consideration of the proposed topology have been demonstrated in the paper. A 1-kW laboratory prototype was built using gallium nitride (GaN) transistors and silicon carbide (SiC) diodes to confirm the effectiveness of the proposed topology.

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