scholarly journals Symmetrical high voltage gain half-bridge inverter based double-Y-source networks with reduced voltage stress

2020 ◽  
Vol 11 (1) ◽  
pp. 515
Author(s):  
Hussain Sayed ◽  
Oday A Ahmed ◽  
Dhari Y Mahmood ◽  
Kanaan A. Jalal ◽  
Waleed H. Habeeb
Keyword(s):  
High Voltage ◽  
Low Voltage ◽  
Single Stage ◽  
Voltage Gain ◽  
Saturation State ◽  
Coupled Inductors ◽  
High Voltage Gain ◽  
Source Impedance ◽  
Voltage Stress ◽  
Mathematical Formulas

<span>A single-stage symmetrical high voltage gain half-bridge (HB) DC-AC converter is proposed in this paper. Using two Y-source impedance networks, the following key features are utilized from the proposed topology: single stage inverter with very high voltage gain compared to conventional HB inverter, symmetrical output voltage waveform, low voltage stress across the passive components because it is distributed across two impedance networks, and only two switching devices are needed for the converter. Furthermore, important merit of the proposed topology is that the current drawn by the Y-coupled inductors is symmetrical around the X-axis which helps to prevent the Y-network cores from reaching the saturation state. And the last compelling feature is a virtual neutral point for the load connection is inherited in the proposed double Y-source impedance networks converter with no need for DC-Link capacitors. For low voltage sources such as photovoltaic (PV) and fuel cell, the converter is designed to achieve continuous input current operation. The operation modes and principles of the inverter are analyzed and discussed deeply in this paper. A detailed mathematical equations system is derived and verified for the presented converter. Finally, PSpice simulation tools are used to simulate the converter and verify the derived mathematical formulas.</span>

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.

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

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.

Improved Y-Source Single-Stage Transformerless Micro-Inverter for PV Residential Applications

2020 ◽  
Vol 38 (9A) ◽  
pp. 1327-1341
Author(s):  
Firas S. Salih ◽  
Oday A. Ahmed
Keyword(s):  
High Voltage ◽  
Power Plants ◽  
Single Stage ◽  
Small Scale ◽  
Voltage Gain ◽  
Leakage Inductance ◽  
High Voltage Gain ◽  
Source Impedance ◽  
Wide Range ◽  
Micro Inverter

Y-Source Impedance Network (YSN) is one of the most suitable for providing high voltage gain. It generatesa high voltage gain by using a small shoot-through duty cycle, which makes it suitable in applications require a wide range of input voltages such as the Photovoltaic (PV) power plants. However, traditional (YSNs) are unable to boost low voltages in certain applications to the DC-link voltage (about 400V) since it requires a high number of the turns ratio. Higher turns ratio implies higher leakage inductance resulting in higher DC-link voltage spikes. Also, traditional YSNs have high voltage stresses across the components. In this paper, a developed new transformerless Micro-Inverter (MI) is presented that can overcome all the aforementioned drawbacks. The proposed MI has been developed and designed to eliminate both the leakage inductance due to three-winding coupled transformer and leakage current due to using transformerless MI configuration. In addition, the proposed MI reduced the components' stress significantly and increases the converter voltage gain capability in one single-stage. The proposed high boost ratio transformerless MI is analyzed through the PLECS software simulator and implemented in a small scale MI prototype to ensure the results agree with the analysis and simulation results.

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 Double-Boost Converter Based on Coupled Inductance and Magnetic Integration

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Hongzhu Li ◽  
Ling Zhu ◽  
Le Wang
Keyword(s):  
Low Voltage ◽  
Boost Converter ◽  
Cell System ◽  
Photovoltaic System ◽  
Switching Frequency ◽  
Voltage Gain ◽  
Leakage Inductance ◽  
Coupled Inductors ◽  
High Voltage Gain ◽  
Voltage Stress

High-voltage gain converter has a high-frequency use in some industrial fields, for instance, the fuel cell system, the photovoltaic system, electric vehicles, and the high-intensity discharge lamp. In order to solve the problem of the low-voltage gain of traditional boost converter, the double-boost converter with coupled inductance and doubled voltage is proposed, which connects the traditional boost converter in parallel. The voltage gain of the converter is further improved by introducing the voltage-doubled unit of the coupled inductance. Moreover, the clamp capacitor can absorb the leakage inductance in the circuit and reduce the voltage stress of the switch. In addition, two coupled inductors are magnetically collected; then, the loss of the core is analyzed under the same gain. The detailed analysis of the proposed converter and a comparison considering other topologies previously published in the literature are also presented in this article. In order to verify the proposed converter performance, a prototype has been built for a power of 200 W, input and output voltages of 12 and 84 V, respectively, and a switching frequency of 50 kHz. Experimental results validate the effectiveness of the theoretical analysis proving the satisfactory converter performance, whose peak efficiency is 95.5%.

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