scholarly journals An Evolutionary Algorithm-Based PWM Strategy for a Hybrid Power Converter

Mathematics ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 1247
Author(s):  
Alma Rodríguez ◽  
Avelina Alejo-Reyes ◽  
Erik Cuevas ◽  
Francisco Beltran-Carbajal ◽  
Julio C. Rosas-Caro
Keyword(s):  
Direct Current ◽  
Duty Cycle ◽  
Pulse Width Modulation ◽  
Differential Evolution Algorithm ◽  
Power Converter ◽  
Power Sharing ◽  
Input Current ◽  
Cuk Converter ◽  
Duty Cycles ◽  
Current Ripple

In the past years, the interest in direct current to direct current converters has increased because of their application in renewable energy systems. Consequently, the research community is working on improving its efficiency in providing the required voltage to electronic devices with the lowest input current ripple. Recently, a hybrid converter which combines the boost and the Cuk converter in an interleaved manner has been introduced. The converter has the advantage of providing a relatively low input current ripple by a former strategy. However, it has been proposed to operate with dependent duty cycles, limiting its capacity to further decrease the input current ripple. Independent duty cycles can significantly reduce the input current ripple if the same voltage gain is achieved by an appropriate duty cycle combination. Nevertheless, finding the optimal duty cycle combination is not an easy task. Therefore, this article proposes a new pulse-width-modulation strategy for the hybrid interleaved boost-Cuk converter. The strategy includes the development of a novel mathematical model to describe the relationship between independent duty cycles and the input current ripple. The model is introduced to minimize the input current ripple by finding the optimal duty cycle combination using the differential evolution algorithm. It is shown that the proposed method further reduces the input current ripple for an operating range. Compared to the former strategy, the proposed method provides a more balanced power-sharing among converters.

scholarly journals Differential Evolution Based Algorithm for Optimal Current Ripple Cancelation in an Unequal Interleaved Power Converter

Mathematics ◽  
2021 ◽  
Vol 9 (21) ◽  
pp. 2755
Author(s):  
Julio C. Rosas-Caro ◽  
Pedro M. García-Vite ◽  
Alma Rodríguez ◽  
Abraham Mendoza ◽  
Avelina Alejo-Reyes ◽  
...  
Keyword(s):  
Differential Evolution ◽  
Differential Evolution Algorithm ◽  
Power Converter ◽  
Input Current ◽  
Switching Frequency ◽  
Duty Cycles ◽  
Numerical Experimentation ◽  
Evolution Algorithm ◽  
Power Electronics Converter ◽  
Current Ripple

This paper proposes an optimal methodology based on the Differential Evolution algorithm for obtaining the set of duty cycles of a recently proposed power electronics converter with input current ripple cancelation capability. The converter understudy was recently introduced to the state-of-the-art as the interleaved connection of two unequal converters to achieve low input current ripple. A latter contribution proposed a so-called proportional strategy. The strategy can be described as the equations to relate the duty cycles of the unequal power stages. This article proposes a third switching strategy that provides a lower input current ripple than the proportional strategy. This is made by considering duty cycles independently of each other instead of proportionally. The proposed method uses the Differential Evolution algorithm to determine the optimal switching pattern that allows high quality at the input current side, given the reactive components, the switching frequency, and power levels. The mathematical model of the converter is analyzed, and thus, the decision variables and the optimization problem are well set. The proposed methodology is validated through numerical experimentation, which shows that the proposed method achieves lower input current ripples than the proportional strategy.

scholarly journals Optimal Operation of the Voltage-Doubler Boost Converter through an Evolutionary Algorithm

Mathematics ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 423
Author(s):  
Cesar Ibarra-Nuño ◽  
Alma Rodríguez ◽  
Avelina Alejo-Reyes ◽  
Erik Cuevas ◽  
Juan M. Ramirez ◽  
...  
Keyword(s):  
Evolutionary Algorithm ◽  
Numerical Optimization ◽  
Boost Converter ◽  
Optimal Operation ◽  
Input Current ◽  
Voltage Gain ◽  
Duty Cycles ◽  
Switching Functions ◽  
Voltage Doubler ◽  
Current Ripple

This manuscript presents the numerical optimization (through a mathematical model and an evolutionary algorithm) of the voltage-doubler boost converter, also called the series-capacitor boost converter. The circuit is driven by two transistors, each of them activated according to a switching signal. In the former operation, switching signals have an algebraic dependence from each other. This article proposes a new method to operate the converter. The proposed process reduces the input current ripple without changing any converter model parameter, only the driving signals. In the proposed operation, switching signals of transistors are independent of each other, providing an extra degree of freedom, but on the other hand, this produces an infinite number of possible combinations of duty cycles (the main parameter of switching signals) to achieve the desired voltage gain. In other words, this leads to a problem with infinite possible solutions. The proposed method utilizes an evolutionary algorithm to determine the switching functions and, at the same time, to minimize the input current ripple of the converter. A comparison made between the former and the proposed operation shows that the proposed process achieves a lower input current ripple while achieving the desired voltage gain.

A DC–DC converter with quadratic gain and input current ripple cancelation at a selectable duty cycle

2017 ◽  
Vol 101 ◽  
pp. 431-436 ◽  
Author(s):  
Pedro Martín García–Vite ◽  
Carlos Abraham Soriano–Rangel ◽  
Julio Cesar Rosas–Caro ◽  
Fernando Mancilla–David
Keyword(s):  
Duty Cycle ◽  
Input Current ◽  
Current Ripple

A High Step-Up Power Converter with Reduced Input Current Ripple for PV Applications

2018 ◽  
Author(s):  
Pedro Martin Garcia-Vite ◽  
Maria del Rosario Rivera-Espinosa ◽  
Rafael Castillo-Gutierrez ◽  
Francisca Hernandez-Angel
Keyword(s):  
Power Converter ◽  
Input Current ◽  
Current Ripple

High‐voltage conversion ratio dual‐input DC–DC converter operating in a wide duty cycle range and canceling input current ripple

2021 ◽  
Author(s):  
Pedram Chavoshipour Heris ◽  
Zahra Saadatizadeh ◽  
Mehran Sabahi ◽  
Xiaodong Liang
Keyword(s):  
High Voltage ◽  
Duty Cycle ◽  
Conversion Ratio ◽  
Input Current ◽  
Voltage Conversion ◽  
Current Ripple

scholarly journals PERANCANGAN BOOST CONVERTER DENGAN LDR SEBAGAI PENGENDALI SINYAL PWM UNTUK MENAIKAN TEGANGAN PANEL SURYA

2018 ◽  
Vol 1 (2) ◽  
pp. 39
Author(s):  
Calvin Yobel Sirait ◽  
Hendi Matalata
Keyword(s):  
Direct Current ◽  
Duty Cycle ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Boost Converter

Boost Converter adalah perangkat catu daya listrik untuk menaikan tegangan DC (Direct Current), teknologi Boost Converter ini berdasarkan pada mode pensaklaran menggunakan pembangkitan sinyal PWM (Pulse Width Modulation )yang diperuntukan  kepada komponen saklar daya  pada rangkaian Boost Converter, sinyal PWM ini mempunyai duty cycle untuk memberikan kendali pada kenaikan keluaran tegangan. Pada penelitian ini pengaturan duty cycle menggunakan LDR (Light Dependent Resistor), yang mana pada fungsinya LDR akan mempunyai nilai hambatan yang besar dalam keadaan gelap dan mempunyai nilai hambatan yang kecil dalam keadaan terang. Hasil pengujian yang dilakukan LDR mampu memberikan perubahan  duty cycle terhadap perubahan intensitas matahari sehingga perancangan Boost Converter pada penelitian ini mampu menaikan besar tegangan keluaran pada panel surya

scholarly journals Analysis of a PWM Converter with Less Current Ripple, Wide Voltage Operation and Zero-Voltage Switching

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 580
Author(s):  
Bor-Ren Lin ◽  
Yi-Hao Peng
Keyword(s):  
Integrated Circuit ◽  
Pulse Width Modulation ◽  
Input Voltage ◽  
Power Converter ◽  
Switching Loss ◽  
Voltage Range ◽  
Zero Voltage Switching ◽  
General Phase ◽  
Zero Voltage ◽  
Current Ripple

This paper studies and implements a power converter to have less current ripple output and wide voltage input operation. A three-leg converter with different primary turns is presented on its high-voltage side to extend the input voltage range. The current doubler rectification circuit is adopted on the output side to have low current ripple capability. From the switching states of the three-leg converter, the presented circuit has two equivalent sub-circuits under different input voltage ranges (Vin = 120–270 V or 270–600 V). The general phase-shift pulse-width modulation is employed to control the presented converter so that power devices can be turned on at zero voltage in order to reduce switching loss. Compared to two-stage circuit topologies with a wide voltage input operation, the presented converter has the benefits of simple circuit structure, easy control algorithm using a general integrated circuit or digital controller, and less components. The performance of the presented circuit is confirmed and validated by an 800 W laboratory prototype.

scholarly journals A New Hybrid Ćuk DC-DC Converter with Coupled Inductors

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2188
Author(s):  
Ioana-Monica Pop-Calimanu ◽  
Maria Balint ◽  
Dan Lascu
Keyword(s):  
Comparative Analysis ◽  
Duty Cycle ◽  
Output Voltage ◽  
Degrees Of Freedom ◽  
Negative Polarity ◽  
Conversion Ratio ◽  
Cuk Converter ◽  
Coupled Inductors ◽  
Duty Cycles ◽  
Theoretical Considerations

This paper proposes a new hybrid Ćuk-type converter employing two inductors built on the same core which can be successfully used in applications requiring an output voltage considering higher than the input one. With few components added, in the proposed converter the static conversion ratio can be easily extended becoming wider compared to the classical Ćuk topology. At the same duty cycle range the output voltage is higher than in the classical Ćuk converter. The output voltage remains with negative polarity and with a reduced ripple. An advantage of the new converter is given by its two degrees of freedom. A DC and AC analysis is carried out, device stresses are evaluated and a comparative analysis of the proposed hybrid Ćuk topology to other indirect converters has also been performed. All the equations necessary for designing the converter are provided. The simulations performed together with the practical experiments carried out, all results confirm that the theoretical considerations are correct and validate the features that the proposed converter can provide a higher static conversion ratio without operating at high duty cycles.

A Transformer-less High-Gain Boost Converter With Input Current Ripple Cancelation at a Selectable Duty Cycle

2013 ◽  
Vol 60 (10) ◽  
pp. 4492-4499 ◽  
Author(s):  
Julio Cesar Rosas-Caro ◽  
Fernando Mancilla-David ◽  
Jonathan Carlos Mayo-Maldonado ◽  
Juan Miguel Gonzalez-Lopez ◽  
Hilda Lizeth Torres-Espinosa ◽  
...  
Keyword(s):  
Duty Cycle ◽  
High Gain ◽  
Boost Converter ◽  
Input Current ◽  
Current Ripple
Sign in / Sign up

Export Citation Format

Share Document