scholarly journals Multiple Output Flyback Converter Design

2020 ◽  
Vol 8 (3) ◽  
pp. 32-39
Author(s):  
Richard Zelnik ◽  
Michal Prazenica
Keyword(s):  
Power Electronics ◽  
Output Voltage ◽  
Input Voltage ◽  
Voltage Regulation ◽  
Practical Implementation ◽  
Space Technology ◽  
Voltage Range ◽  
Pulse Width Modulated ◽  
Flyback Converter ◽  
Converter Topology

DC-DC converters are mainly used to provide required output voltage by suitably controlling the pulse width modulated (PWM) signal given to the gate of the fast-acting power electronics switches. The flyback converter is one such popular isolated DC-DC converter topology used to obtain regulated output voltage in low power applications. They are used as power supply systems in space technology and in many other industrial power electronics systems, where having constant voltage is very much essential. This paper presents the practical implementation of multiple output Flyback converter with MOSFET as a switching device. The designed converter is observed to have a good output voltage regulation and higher efficiency for the wide input voltage range.

Design and Analysis of the Performance of a Solar Driven Micro-Inverter Using Single Ended Primary Inductance Converter Topology

2019 ◽  
Vol 16 (2) ◽  
pp. 529-536
Author(s):  
G. Radhakrishnan ◽  
Sheeba S. Rani ◽  
K. C. Ramya ◽  
Maideen Abdul Kadher A. Jeylani ◽  
V. Gomathy
Keyword(s):  
High Efficiency ◽  
Input Voltage ◽  
Voltage Regulation ◽  
Solar Module ◽  
Voltage Range ◽  
Current Switching ◽  
Resonant Inverter ◽  
Converter Topology ◽  
Inverter Topology ◽  
Micro Inverter

In typical solar power installations, multiple modules are connected to the grid through a single high-power inverter. However, an alternative approach is to connect each solar module directly to the grid through a micro-inverter. This approach makes the system robust to single module failures and results in better power tracking. PV based cower conditioning system need a high-efficiency dc–dc converter capable of regulation over a wide input voltage range for Maximum Power Point Tracking (MPPT) and a high-efficiency micro-inverter. To diminish the ground leakage currents, also to use a high-efficiency system, the proposed concept is required for this micro-inverter to provide galvanic isolation between the PV module and the inverter. This concept involves the design of a micro-inverter topology which includes design of Single Ended Primary Inductance Converter (SEPIC) dc/dc converter, isolated resonant inverter and a cyclo-converter. The SEPIC converter topology yields high efficiency through constant voltage MPPT algorithm. The Resonant inverter topology produces efficient output through low circulating currents, Zero Voltage Switching (ZVS), low-current switching of the primary side devices, and Zero Current Switching (ZCS) of the output diodes. This Resonant inverter topology is also able to provide voltage regulation through basic fixed-frequency Pulse Width Modulated (PWM) control. The features of proposed system can able to achieve w the simple addition of a secondary-side bidirectional ac switch to the isolated series resonant converter.

scholarly journals Flyback converter controlled by Arduino Uno

2020 ◽  
Vol 1 (1) ◽  
pp. 18-29
Author(s):  
Khalid Badr Yass
Keyword(s):  
Output Voltage ◽  
Feedback Loop ◽  
Input Voltage ◽  
Pi Controller ◽  
Control Mode ◽  
Practical Implementation ◽  
Resistive Load ◽  
Flyback Converter ◽  
Arduino Uno ◽  
Voltage Control Mode

This paper presented the design, simulation, and implantation a DC-DC step-up Flyback converter that regulates the output voltage to give the desired value 200 V 100 W and can be used in many application such as power supply. To give a regulated output voltage from the flyback converter, a feedback loop with Proportional-integral (PI) controller is used. A simulation of the flyback converter employed by MATLAB/Simulink under variation in the input voltage and load. Also, the practical implementation used Arduino Uno microcontroller to control the duty cycle through IR2110 driver at the change in the input voltage or resistive load. It gives better flexibility and a good response to the control system. The duty controller to create regulate output voltage by using voltage control mode.

scholarly journals Analysis and Design for Output Voltage Regulation in Constant-on-Time-Controlled Fly-Buck Converter

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1886
Author(s):  
Younghoon Cho ◽  
Paul Jang
Keyword(s):  
Output Voltage ◽  
Voltage Regulation ◽  
Design Guidelines ◽  
Buck Converter ◽  
Design Guideline ◽  
Analysis And Design ◽  
Flyback Converter ◽  
Auxiliary Power ◽  
Primary Output ◽  
Output Capacitor

Fly-buck converter is a multi-output converter with the structure of a synchronous buck converter structure on the primary side and a flyback converter structure on the secondary side, and can be utilized in various applications due to its many advantages. In terms of control, the primary side of the fly-buck converter has the same structure as a synchronous buck converter, allowing the constant-on-time (COT) control to be applied to the fly-buck converter. However, due to the inherent energy transfer principle, the primary-side output voltage regulation of COT controlled fly-buck converters may be poor, which can deteriorate the overall converter performance. Therefore, the primary output capacitor must be carefully designed to improve the voltage regulation characteristics. In this paper, a theoretical analysis of the output voltage regulation in COT controlled fly-buck converter is conducted, and based on this, a design guideline for the primary output capacitor considering the output voltage regulation is presented. The validity of the analysis and design guidelines was verified using a 5 W prototype of the COT controlled fly-buck converter for telecommunication auxiliary power supply.

scholarly journals Implementation of Buck-Boost Converter as Low Voltage Stabilizer at 15 V

2019 ◽  
Vol 9 (4) ◽  
pp. 2230
Author(s):  
Suwarno Suwarno ◽  
Tole Sutikno
Keyword(s):  
Power Electronics ◽  
Wind Power ◽  
Output Voltage ◽  
Low Voltage ◽  
Input Voltage ◽  
Boost Converter ◽  
Voltage Stabilizer ◽  
Voltage Regulator ◽  
Output Current ◽  
Converter Design

<p>This paper presents the implementation of the buck-boost converter design which is a power electronics applications that can stabilize voltage, even though the input voltage changes. Regulator to stabilize the voltage using PWM pulse that triger pin 2 on XL6009. In this design of buck-boost converter is implemented using the XL6009, LM7815 and TIP2955. LM7815 as output voltage regulator at 15V with 1A output current, while TIP2955 is able to overcome output current up to 5A. When the LM7815 and TIP2955 are connected in parallel, the converter can increase the output current to 6A.. Testing is done using varied voltage sources that can be set. The results obtained from this design can be applied to PV (Photovoltaic) and WP (Wind Power), with changes in input voltage between 3-21V dc can produce output voltage 15V.</p>

scholarly journals Step-Up Series Resonant DC–DC Converter with Bidirectional-Switch-Based Boost Rectifier for Wide Input Voltage Range Photovoltaic Applications

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3747 ◽  
Author(s):  
Abualkasim Bakeer ◽  
Andrii Chub ◽  
Dmitri Vinnikov
Keyword(s):  
Theoretical Analysis ◽  
Duty Cycle ◽  
Input Voltage ◽  
Voltage Regulation ◽  
Switching Frequency ◽  
Voltage Gain ◽  
Voltage Range ◽  
Dc Voltage ◽  
Wide Range ◽  
Series Resonant

This paper proposes a high gain DC–DC converter based on the series resonant converter (SRC) for photovoltaic (PV) applications. This study considers low power applications, where the resonant inductance is usually relatively small to reduce the cost of the converter realization, which results in low-quality factor values. On the other hand, these SRCs can be controlled at a fixed switching frequency. The proposed topology utilizes a bidirectional switch (AC switch) to regulate the input voltage in a wide range. This study shows that the existing topology with a bidirectional switch has a limited input voltage regulation range. To avoid this issue, the resonant tank is rearranged in the proposed converter to the resonance capacitor before the bidirectional switch. By this rearrangement, the dependence of the DC voltage gain on the duty cycle is changed, so the proposed converter requires a smaller duty cycle than that of the existing counterpart at the same gain. Theoretical analysis shows that the input voltage regulation range is extended to the region of high DC voltage gain values at the maximum input current. Contrary to the existing counterpart, the proposed converter can be realized with a wide range of the resonant inductance values without compromising the input voltage regulation range. Nevertheless, the proposed converter maintains advantages of the SRC, such as zero voltage switching (ZVS) turn-on of the primary-side semiconductor switches. In addition, the output-side diodes are turned off at zero current. The proposed converter is analyzed and compared with the existing counterpart theoretically and experimentally. A 300 W experimental prototype is used to validate the theoretical analysis of the proposed converter. The peak efficiency of the converter is 96.5%.

scholarly journals AC-AC voltage regulation by switch mode PWM Cûk voltage controller with improved performance

2021 ◽  
Author(s):  
Palash K. Banerjee
Keyword(s):  
Output Voltage ◽  
Supply Voltage ◽  
Input Voltage ◽  
Voltage Regulation ◽  
Control Circuit ◽  
Voltage Regulator ◽  
Error Signal ◽  
Constant Voltage ◽  
Wide Range ◽  
Switching Devices

In this research project, an AC Cûk voltage regulator has been proposed for maintaining constant voltage across the load during wide range of input voltage fluctuations. The proposed AC Ck voltage regulator made of practical IGBT switches has been investigated for both manual and automatic control circuit. A fraction of the output voltage is taken as the input voltage of the control circuit and produce the error signal if any changes occur in the output voltage. The modified error signal is used to make PWM signals for switching devices as per output voltage of regulator. The PWM controls the ON/OFF time (Duty cycle) of switching devices (IGBTs) of the proposed regulator. As a result the regulator is maintaining a constant voltage across the load during any change in supply voltage. The simulation waveforms and the calculated total harmonics distortion (THD) values are compared with previously studied AC Buck-Boost regulator. The observed simulated waveforms of output voltage, output current and input current and THD values have been improved in case of proposed AC Cûk voltage regulator.

scholarly journals Smooth-Transition Simple Digital PWM Modulator for Four-Switch Buck-Boost Converters

Electronics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 100
Author(s):  
Miguel Fernandez ◽  
Alberto Rodriguez ◽  
Miguel Rodríguez ◽  
Aitor Vazquez ◽  
Pablo Fernandez ◽  
...  
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
Input Voltage ◽  
Smooth Transition ◽  
Boost Converters ◽  
Voltage Range ◽  
Pulse Width Modulator ◽  
Digital Pulse ◽  
Smooth Transitions

This paper proposes a simple, hardware-efficient digital pulse width modulator for a 4SBB that enables operation in Buck, Boost, and Buck+Boost modes, achieving smooth transitions between the different modes. The proposed modulator is simulated using Simulink and experimentally demonstrated using a 500 W 4SBB converter with 24 V input voltage and 12–36 V output voltage range.

Decentralized Voltage Balancing and Power Sharing in Islanded Bipolar DC Microgrids

2020 ◽  
Author(s):  
Saman Dadjo Tavakoli
Keyword(s):  
Transfer Functions ◽  
Control Method ◽  
Input Voltage ◽  
Voltage Regulation ◽  
Power Sharing ◽  
Dc Microgrid ◽  
Voltage Balancing ◽  
Dc Microgrids ◽  
Converter Topology ◽  
Unbalanced Loads

<div>This paper presents a decentralized control scheme for voltage balancing and power sharing in bipolar dc</div><div>microgrids. This relies on utilizing a converter topology which offers three levels of output voltage availability with the key features of boosting the input voltage and balancing the output voltages. This converter makes it possible to further improve the structure of bipolar dc microgrids as it does not require a central voltage balancer. Small-signal analysis is done and system transfer functions are derived. Based on the RGA concept the highly coupled input-output pairs are found which helps with replacing the MIMO control system of the converter by two SISO systems. The appropriate voltage and current controllers are designed based on SISO principles. Moreover, a double droop control method is proposed which fulfills the simultaneous power sharing and voltage regulation of DG units in the host microgrid. The effectiveness of the proposed control strategy is demonstrated through simulation studies conducted on an</div><div>islanded bipolar dc microgrid involving unbalanced loads, while the voltage balancing of the bipolar dc microgrid and the power sharing accuracy are evaluated.</div>

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