scholarly journals A Modified Topology of a High Efficiency Bidirectional Type DC–DC Converter by Synchronous Rectification

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1555
Author(s):  
Somalinga S S Sethuraman ◽  
KR. Santha ◽  
Lucian Mihet-Popa ◽  
C. Bharatiraja
Keyword(s):  
Energy Source ◽  
Output Voltage ◽  
High Efficiency ◽  
Storage Systems ◽  
Voltage Gain ◽  
Boost Converters ◽  
Hybrid Energy ◽  
Large Current ◽  
Synchronous Rectification ◽  
Step Down

A modified Topology to acquire high efficiency of a bidirectional method of DC–DC converter of non-isolated approach is proposed. The modified circuit involves four numbers of switches with their body diodes, passive elements as two inductors as well as a capacitor and the circuit arrangements double boost converters to progress the voltage gain. The input current of the proposed topology divided amongst the two dissimilar values of inductors produces greater efficiency. In the step-down mode, an apparent lessening in voltage gain and also enhanced efficiency can be realized in the recommended system by expending a synchronous rectification. The modified topology shields the technique for presentation of easy control configurations and is used for truncated output voltage with a large current of energy storage systems in the renewable applications as well as hybrid energy source electric vehicle applications. The simulation of the projected structure has been conducted through MATLAB/Simulink software and has been corroborated through a 12 V/180 V, 200 Watts experimental prototype circuit.

scholarly journals Mathematical Modelling of High Voltage Gain Converter Using P and O for PV Based Application

2018 ◽  
Vol 225 ◽  
pp. 04002
Author(s):  
Arunkumari Thiyagu ◽  
V. Indragandhi ◽  
Ramani Kannan
Keyword(s):  
Mathematical Modelling ◽  
High Voltage ◽  
Output Voltage ◽  
High Efficiency ◽  
Load Condition ◽  
High Gain ◽  
Voltage Gain ◽  
Voltage Ripple ◽  
High Voltage Gain ◽  
Input Source

This manuscript proposes a novel single switch converter which attains high voltage gain using P and O algorithm. The proposed converter is multilevel with voltage tripler technique. Here the output voltage gain attained is 11 times than the input source. The voltage ripple attained is less compared to other models. The main advantage of the converter is high efficiency, reduced switch loss, high gain and reduction in ripple. The converter attains efficiency of 97.3% at full load condition. The proposed converter is analysed by both Simulink MATALAB and Hardware prototype.

A HIGH EFFICIENCY ADAPTIVE CURRENT MODE STEP-UP/STEP-DOWN DC–DC CONVERTER WITH FOUR MODES FOR SMOOTH TRANSITION

2014 ◽  
Vol 23 (07) ◽  
pp. 1450097 ◽  
Author(s):  
YANZHAO MA ◽  
SHAOXI WANG ◽  
SHENGBING ZHANG ◽  
XIAOYA FAN
Keyword(s):  
Transient Response ◽  
Output Voltage ◽  
High Efficiency ◽  
Current Mode ◽  
Smooth Transition ◽  
Maximum Efficiency ◽  
Cmos Process ◽  
Voltage Ripple ◽  
Transition Modes ◽  
Step Down

This paper presents a current mode step-up/step-down DC–DC converter with high efficiency, small output voltage ripple, and fast transient response. The control scheme adaptively configures the converter into the proper operation mode. The efficiency is improved by reducing the switching loss, wherein the converter operates like a buck or boost converter, and conduction loss, wherein the average inductor current is reduced in transition modes. The output voltage ripple is significantly reduced by incorporating two constant time transition modes. A fast line transient response is achieved with small overshoot and undershoot voltage. An adaptive substrate selector (ASS) is introduced to dynamically switch the substrate of PMOS power transistors to the highest on-chip voltage. A lossless self-biased current sensor with high-speed and high-accuracy is also achieved. The proposed converter was designed with a standard 0.5 μm CMOS process, and can regulate an output voltage within the input voltage ranged from 2.5 V to 5.5 V. The maximum load current is 600 mA, and the maximum efficiency is 94%. The output voltage ripple is less than 15 mV in all operation modes.

scholarly journals Extra-High-Voltage DC-DC Boost Converters Topology with Simple Control Strategy

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
P. Sanjeevikumar ◽  
K. Rajambal
Keyword(s):  
High Voltage ◽  
Output Voltage ◽  
Control Algorithm ◽  
High Efficiency ◽  
Low Cost ◽  
Buck Converter ◽  
Boost Converters ◽  
Wide Range ◽  
Power Transfer Efficiency ◽  
Extra High Voltage

This paper presents the topology of operating DC-DC buck converter in boost mode for extra-high-voltage applications. Traditional DC-DC boost converters are used in high-voltage applications, but they are not economical due to the limited output voltage, efficiency and they require two sensors with complex control algorithm. Moreover, due to the effect of parasitic elements the output voltage and power transfer efficiency of DC-DC converters are limited. These limitations are overcome by using the voltage lift technique, opens a good way to improve the performance characteristics of DC-DC converter. The technique is applied to DC-DC converter and a simplified control algorithm in this paper. The performance of the controller is studied for both line and load disturbances. These converters perform positive DC-DC voltage increasing conversion with high power density, high efficiency, low cost in simple structure, small ripples, and wide range of control. Simulation results along theoretical analysis are provided to verify its performance.

scholarly journals A High Step-Up Switched Z-Source Converter (HS-SZC) with Minimal Components Count for Enhancing Voltage Gain

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 924
Author(s):  
Rahul Kumar ◽  
Ramani Kannan ◽  
Nursyarizal Bin Mohd Nor ◽  
Apel Mahmud
Keyword(s):  
Output Voltage ◽  
Load Capacity ◽  
Renewable Energy Sources ◽  
Experimental Studies ◽  
Cost Effective ◽  
Duty Ratio ◽  
Voltage Gain ◽  
Boost Converters ◽  
Boost Factor ◽  
Output Capacitor

Some applications such as fuel cells or photovoltaic panels offer low output voltage, and it is essential to boost this voltage before connecting to the grid through an inverter. The Z-network converter can be used for the DC-DC conversion to enhance the output voltage of renewable energy sources. However, boosting capabilities of traditional Z-network boost converters are limited, and the utilization of higher parts count makes it bulky and expensive. In this paper, an efficient, high step-up, switched Z-source DC-DC boost converter (HS-SZC) is presented, which offers a higher boost factor at a smaller duty ratio and avoids the instability due to the saturation of inductors. In the proposed converter, the higher voltage gain is achieved by using one inductor and switch at the back end of the conventional Z-source DC-DC converter (ZSC). The idea is to utilize the output capacitor for filtering and charging and discharging loops. Moreover, the proposed converter offers a wider range of load capacity, thus minimizing the power losses and enhancing efficiency. This study simplifies the structure of conventional Z-source converters through the deployment of fewer components, and hence making it more cost-effective and highly efficient, compared to other DC-DC boost converters. Furthermore, a comparison based on the boosting capability and number of components is provided, and the performance of the proposed design is analyzed with non-ideal elements. Finally, simulation and experimental studies are carried out to evaluate and validate the performance of the proposed converter.

scholarly journals Design and Implementation of a High Step-Up DC-DC Converter Based on the Conventional Boost and Buck-Boost Converters with High Value of the Efficiency Suitable for Renewable Application

2021 ◽  
Vol 13 (19) ◽  
pp. 10699
Author(s):  
Tohid Rahimi ◽  
Md Rabiul Islam ◽  
Hossein Gholizadeh ◽  
Saeed Mahdizadeh ◽  
Ebrahim Afjei
Keyword(s):  
Duty Cycle ◽  
Signal Analysis ◽  
High Efficiency ◽  
Switching Frequency ◽  
Small Signal ◽  
Voltage Gain ◽  
Boost Converters ◽  
Small Signal Analysis ◽  
Current Voltage ◽  
Input Filter

This paper introduces a novel topology of the proposed converter that has these merits: (i) the topology of the converter is based on conventional boost and buck-boost converters, which has caused its simplicity; (ii) the voltage gain of the converter has provided higher values by the lower value of the duty cycle; (iii) due to the use of high-efficiency conventional topologies in its structure, the efficiency of the converter keeps its high value for a great interval of duty cycle; (iv) besides the increase of the voltage gain, the current/voltage stresses of the semiconductors have been kept low; (v) the continuous input current of this converter reduces the current stress of the capacitor in the input filter. It is worth noting that the proposed converter has been discussed in both ideal and non-ideal modes. Moreover, the operation of the converter has been discussed in both continuous/discontinuous current modes. The advantages of the converter have been compared with recently suggested converters. In addition, the different features of the converter have been discussed for different conditions. In the small-signal analysis, the appropriate compensator has been designed. Finally, the simulation and experimental results have been reported for 90 W output power, 90 V output voltage, 3-times voltage gain, and 100 kHz switching frequency.

scholarly journals Analysis of loss distribution of Conventional Boost, Z-source and Y-source Converters for wide power and voltage range

2017 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
Brwene Salah Gadalla ◽  
Erik Schaltz ◽  
Yam Siwakoti ◽  
Frede Blaabjerg
Keyword(s):  
Output Voltage ◽  
Input Voltage ◽  
Industrial Applications ◽  
Point Of View ◽  
Small Range ◽  
Voltage Gain ◽  
Boost Converters ◽  
Voltage Range ◽  
High Voltage Gain ◽  
Simulation Results

Boost converters are needed in many applications which require the output voltage to be higher than the input voltage. Recently, boost type converters have been applied for industrial applications, and hence it has become an interesting topic of research. Many researchers proposed different impedance source converters with their unique advantages as having a high voltage gain in a small range of duty cycle ratio. However, the thermal behaviour of the semiconductor devices and passive elements in the impedance source converter is an important issue from a reliability point of view and it has not been investigated yet. Therefore, this paper presents a comparison between the conventional boost, the Z-source, and the Y-source converters based on a thermal evaluation of the semiconductors. In addition, the three topologies are also compared with respect to their efficiency. In this study the results show that the boost converter has higher efficiency than the Zsource and Y-source converter for these specific voltage gain of 2 and 4. The operational principle, mathematical derivations, simulation results and final comparisons are presented in this paper.

scholarly journals STUDY AND PERFORMANCE OF SINGLE-PHASE RECTIFIERS WITH VARIOUS TYPE OF PARAMETER

2020 ◽  
Vol 3 (1) ◽  
pp. 9-14
Author(s):  
S.K. Mahobia ◽  
G.R. Kumrey
Keyword(s):  
Power Supply ◽  
Output Voltage ◽  
Power Supply System ◽  
Single Phase ◽  
Supply System ◽  
Input Current ◽  
Voltage Gain ◽  
Different Types ◽  
Step Down ◽  
And Performance

This paper represents the study of different types of single phase AC to DC step down converter. Performances and outputs have analyzed depending on the equations. Different parameters such as voltage gain, harmonic contents in input current, and parameters of changing output voltage are compared different type of single phase AC to DC converters. AC to DC converter is defined as rectifier. The main power supply system is alternating in nature. Rectification action is required to obtain DC supply from the main power supply which issinusoidal.

scholarly journals A Transformer less Buck Boost Converter with Positive Output Voltage

2021 ◽  
Vol 9 (VII) ◽  
pp. 3575-3580
Author(s):  
Lambu Rushi Reddy
Keyword(s):  
Output Voltage ◽  
Input Voltage ◽  
Industrial Applications ◽  
Boost Converter ◽  
Voltage Gain ◽  
High Voltage Gain ◽  
Duty Cycles ◽  
Power Switches ◽  
Constant Output ◽  
Step Down

Some industrial applications require high step-up and step-down voltage gain. The transformer less buck-boost converter has high voltage gain than that of traditional buck-boost converter without extreme duty cycles. A transformer less buck-boost converter with simple structure is obtained by inserting an additional switched network into the traditional buck-boost converter. The two power switches of the buck-boost converter operate synchronously. The operating principles of the buck-boost converter operating in continuous conduction modes are presented. A new buck- boost converter is presented by providing a feedback to the converter. By this, constant output voltage can be maintained under varying load conditions in both buck and boost operation. The output voltage of 40V (step—up mode)/8V (step down mode) is obtained with input voltage 18V and the outcomes are approved through recreation using PSIM MODEL.

scholarly journals Dynamic Modeling and Closed-Loop Control of a Tapped Inductor Buck Converter

2021 ◽  
Author(s):  
Siripan Trakuldit ◽  
Chanin Bunlaksananusorn
Keyword(s):  
Dynamic Modeling ◽  
Transient Response ◽  
Output Voltage ◽  
Closed Loop ◽  
High Efficiency ◽  
Buck Converter ◽  
Closed Loop Control ◽  
Voltage Step ◽  
Loop Control ◽  
Step Down

Modern smart electronic and information technology (IT) devices require a low DC voltage for operation. The low supply voltage is typically provided by a dedicated DC−DC converter by stepping down the system’s bus voltage (e.g., 12 V). It is essential that the converter possesses a large voltage step-down gain and, at the same time, operates at high efficiency. A tapped inductor buck converter (TIBC) is a topology that has a potential to meet these requirements. It has a simple circuit structure and high efficiency similar to a buck converter, but can give a larger voltage step-down gain. This paper presents a dynamic modeling and closed-loop control of a TIBC. The state space averaging (SSA) method is adopted for the dynamic modeling to derive small-signal transfer functions of the converter. Based on the duty-cycle-to-output voltage transfer function, a closed-loop control is designed to keep the converter’s output voltage constant. To verify the design, a prototype TIBC with closed-loop control is implemented. Experimental results show that the prototype converter has good output voltage regulation and fast transient response when subject to a step load. The effect of the crossover frequency and phase margin on the converter’s transient response is also illustrated.

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