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Combining low‐voltage power sources with loads that require high‐voltage levels is a challenge, especially for power devices above 500 W. In this context, this study presents a new dc–dc high‐gain converter using coupled inductors. The new converter uses only one switch and output capacitors with low values. It also allows the use of energy from th...
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p>In the last few years, the non-isolated dc converters involving high voltage gain with adequate performance are becoming quite popular in industrial applications. This is resulting in high voltage and current stress on the power device (switches and diodes), as well as a limited output voltage with a high duty cycle. This paper proposes a multi-p...
Citations
... The high-voltage gain of the CI-based converters can happen by varying the turns ratio between the primary, secondary, and tertiary. In [30][31][32], quadratic base exists that despite conventional quadratic base they do not have limitation of voltage and these converters use CI to improve the gain. Using the different types of clamp circuits like diode clamps [19], passive clamps [20,22], and active clamps [21] reduces the voltage spikes across the power switches and also causes lower voltage stress on power switches. ...
... Table 1 demonstrates the features of the suggested converter and other configurations in terms of voltage gain, the normalized peak voltage of the power switch, maximum voltage stress on diodes, ZCS capability, number of components, and number of magnetic cores. Table 1 consist of details of the converters in [5] and [22][23][24][25][26][27][28][29][30][31][32]. All the references that are utilized in Table 1 have CI structures. ...
... ZCS turn on and ZCS turn off exist in the proposed converter as depicted in Figure 4 that enhance the efficiency of the proposed converter. Unlike the proposed converter, the configurations in [5,22,24,26,27,30], and [32] do not have ZCS capability on their semiconductor components. ...
This paper presents a non‐isolated single‐switch ultra‐high step‐up (UHSU) DC–DC converter with a three‐winding coupled inductor (CI) which is utilized to achieve ultra‐high voltage gain with a small amount of duty cycle leading to low conduction losses of the power switch and higher efficiency. The voltage gain of the suggested UHSU converter is adjusted by two methods: the duty cycle of the power switch and the three‐winding CI turn ratio, therefore enhancing the design flexibility of the suggested converter. Due to the utilization of the passive clamp circuit in the structure of the proposed converter, it is possible to select a power switch with low voltage rated and small ON‐state resistance, further enhancing the converter efficiency. The operation modes are discussed in detail and to clarify the salient features of the proposed converter, a comparison with other configurations is provided. Finally, to accredit the performance of the proposed converter, a 150‐W laboratory archetype with an input and output voltage of 20 and 300 V, respectively, at 50 kHz switching frequency is fabricated.
... P OWER produced from renewable sources is generally at very low dc voltages and needs to be stepped up by means of high step-up dc-dc converters. Therefore, these converters have attracted by many researchers working in the field of power electronics [1], [2], [3], [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28]. In order to make dc-dc converters suitable for renewable energy applications, they ought to have ultrahigh voltage gain and some quality factors which will be discussed in this article. ...
... Boosting voltage techniques are utilized to increase voltage gain in dc-dc converters, each coming with its own advantages and disadvantages. Well-known boosting techniques are the cascading [6], [11] and the interleaving [18] approaches that utilize switched capacitor [5], [28], coupled inductor (CI) [10], [17], multiplier cell [1], [14], and high frequency transformers [12], [14] to reach higher voltage levels. ...
... Furthermore, location of CI has positive or negative effects on voltage stress of semiconductors that needs more attentions during design of the converters. The negative effects of CI on maximum voltage stress of diodes in [1], [2], [3], [5], [6], [7], [8], [9], [10], and [12] and maximum voltage stress of power switches in [2] and [7] can be mentioned as examples. However, in some of the other converters such as the proposed one and the converters in [1], [3], [4], [5], [8], [9], [10], [11], and [12], increasing turn ratio of CI reduces the stress on their switches. ...
This paper proposes an ultrahigh step-up DC-DC converter composed of two boosting stages, a coupled inductor and switched capacitors. Advance features of the converter consist of its high voltage gain, low voltage stress on its switches, continuity of its input current and existence of a common ground between the source and load. In addition, it needs an inductor and a coupled inductor with smaller sizes in comparison to the compared references which lead to its performance with higher efficiency. Among the compared converters, the proposed converter boosts voltage with higher voltage gain per different turns ratio of the coupled inductor. Analysis of the converter has been performed for its main switching states to validate its quality and quantity factors. A prototype is built in order to experiment its performance per different conditions and evaluate the analysis. The experiments are rated for input voltage, output voltage and output power equal to 25V, 400V and 150W respectively.
... To mitigate this issue, damping circuits become necessary, with the trade-off of an increased component count. Additionally, when operating at high gain ratios, the output diode is exposed to substantial voltage spikes during commutation processes (GUEPFRIH, WALTRICH, LAZZARIN, 2019). ...
... Despite enabling significant voltagegain, the efficiency of quadratic converters is not high, as it is the multiplication of the efficiency of each stage. Moreover, switching and conduction losses are exacerbated due to the high voltage stress imposed on the semiconductor components of the output stage in high-output-voltage applications (RAGHAVENDRAN, et al. 2021;GUEPFRIH, WALTRICH, LAZZARIN, 2019). ...
... The input parameters were chosen based on typical values of photovoltaic modules. The operation frequency of the converter was chosen based on Guepfrih (2019) taking into account the optimization of the circuit. The values of capacitors and semiconductors were chosen considering their effective current, voltage and equivalent series resistance. ...
Estamos vivendo na era digital, em que fábricas e suas máquinas equipadas com
inteligência artificial tornam-se inteligentes e com ampla interação humano-máquina. No entanto,
a forma como os indivíduos se apresentam permanece analógica, ou seja, dependem de currículos
e apresentações gravadas ou em papel, principalmente quando não são graduados na área de
tecnologia da informação. Nesse sentido, o objetivo deste trabalho é promover a aplicação de um
repositório digital como ferramenta de armazenamento e fonte de referência para cursos de gestão
no eixo tecnológico da produção industrial, ou seja, para leigos em programação. A metodologia
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compartilhamento e gerenciamento conhecido como github. Os resultados apontam para um
template digital como produto, uso de tecnologias específicas de suporte e uma mentalidade ágil,
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... Moreover, for the converter to be able to reject variations in output voltage and input current peaks at instants of load variations, the controllers in the voltage and current loops are designed, as presented in [41]. For the internal control of the current loop, the linear controller (PI + pole) is used to clear the error in steady state, meeting the following specifications: ...
This paper presents a study of a new topology of a DC–DC converter titled double quadratic boost non-isolated. This converter has high static gain and proposes to reduce the voltage stress on the switches, where the maximum voltage value at each switch is equal to half of the total output voltage. The paper first presents the theoretical analysis of the converter operating in open loop. The objective of the work is the mathematical modeling and control strategy of the converter, as well as validation through closed loop experimental results. In addition, we present the results of practical tests to demonstrate the operation of the converter, such as the experimental static gain curve, the practical efficiency of the converter, and the output voltage control, as well as the capacitor voltage swing control. The authors designed the prototype for 1 kW, with a switching frequency of fs=50 kHz, with FPGA-based control and modulation.
... Besides, for the converter to be able to reject variations in output voltage and input current peaks at instants of load variations, the controllers in the voltage and current loops are designed, as presented in [28]. For the internal control of the current loop, the linear controller (PI + pole) is used to clear the error in steady state, meeting the following specifications: ...
This paper presents a comprehensive study and the analysis of a topology of a no isolated DC-DC intituled Double Quadratic Boost converter with high static gain. This converter has the main advantage of high static gain and low voltage stress on its switches. The article will first present the theoretical analysis of the converter operating in an open loop. The objective of the work is the mathematical modeling and the control strategy of the converter, as well as the validation through closed-loop experimental results. Besides, we presented the practice test results to demonstrate the operation of the converter, such as the static gain experimental curve, the practice efficiency of the converter, and the control of the output voltage, as well as the capacitor voltage balance control. The authors designed a prototype for 1 kW, with a switching frequency of fs=50kHz, with FPGA-based command and modulation.
... However, these converters use a coupled inductor or a transformer, which results in a higher voltage gain. The converters presented in [46] and [47] are designed for a higher power than the previous ones, that were chosen for this comparison for being similar to the proposed concept or having some kind of current sharing and voltage reducing technique. Although the structures shown in [46] and [47] have a higher voltage gain than the proposed concept, they are not generalized for more stages, resulting in a limitation for the voltage and current sharing capabilities, and they do not present balanced series output capacitors. ...
... The converters presented in [46] and [47] are designed for a higher power than the previous ones, that were chosen for this comparison for being similar to the proposed concept or having some kind of current sharing and voltage reducing technique. Although the structures shown in [46] and [47] have a higher voltage gain than the proposed concept, they are not generalized for more stages, resulting in a limitation for the voltage and current sharing capabilities, and they do not present balanced series output capacitors. ...
The integration of switched-capacitor voltage multiplier cells in basic converter topologies has been studied to provide voltage gain and voltage stress reduction. However, SC cells do not provide current sharing and additionally they induce high current spikes in the devices, which are limitations of these structures to operate in high power levels. The main contribution of this paper is to overcome this drawback proposing the use of a multistate switching-cell for current sharing in SC-based boost converters, which reduces the current stress in the power devices and increases the power levels of this family of converters. The proposed concept can be generalized for m number of SC cells and n number of switching cells to increase the voltage gain and current levels. Furthermore, it can be applied to other basic structures. The theoretical analysis of the proposed structure was evaluated experimentally in a 3 kW boost-type dc-dc converter, achieving 200 V to 1200 V voltage gain, and reaching 98.4% of maximum efficiency.
... Hence, boosting voltage technique are utilized to increase voltage gain in DC-DC converters. Well known boosting techniques are cascading [5], interleaving [7,19], using: switched capacitor [14,[26][27], coupled inductor [1,12], multiplier cell [4,9] and high frequency transformers [3,9]. ...
... Another approach to further increase voltage gain in a DC-DC converter is selection of an appropriate converter for base of the configuration. Cascading of two conventional boost converters (CBC), called quadratic boost converter (QBC), can increase voltage gain as a quadratic function of duty cycle [3], [4], [8], [11] and [13]. However, in this converter, a high voltage stress, which is equal to the output voltage, is placed on the power switch. ...
... where , 1 , , , and are wire effective resistivity of copper (1.724 × 10 −6 Ω. ), applied primary voltsecond, total rms winding currents, core loss coefficient in terms 3 , winding fill factor and allowed total power dissipation respectively. The used cores in the prototype for the coupled inductors are ETD49 with the detail in Table I. ...
In this paper, a new ultrahigh step-up DC-DC converter is proposed. The circuit is composed of a quadratic boost converter, two coupled inductors and a voltage multiplier cell. The distinguishing features of this converter are low voltage stress on the main power switches, continuity of the input current, common ground between load and source and ultrahigh voltage gain. Among the all compared converters, voltage gain of the converter in the entire duty cycle and the coupled inductor’s turn ratio range, is higher and unique of its kind. A prototype is also prepared in order to experimentally validate feasibility and effectiveness of the proposed converter. This prototype is rated at 250W and 600V output power and voltage, respectively. In the experiments, the output voltage is controlled on its rated value of 600V, while the input voltage varies from 15V to 30V, meaning that the maximum experimental voltage gain is equal to 40.
... The interest in high gain voltage converters has increased and new and different configurations have been proposed (see for example [10][11][12][13]), almost all of them based on coupled inductors; a summary list of applications of coupled inductors in dc-dc converters can be found in [14]. However, as the number of diodes, MOSFETs, inductors and capacitors increases, the system becomes even more complex. ...
In this paper, we present a method to control a boost flyback converter using a hysteresis band, which is designed using information of the magnetization current and a proportional integral control action of the error. The stability of the periodic orbit is proven via the monodromy matrix, and the robustness, after the first tests of the disturbance rejection, is proven using bifurcation diagrams. When the period-1 orbit losses the stability, it disappears and gives rise to other period-1 orbit with different topological sequence. In all cases that we tested, the system always presented a good performance in a period-1 orbit with very low error.
... These converters mainly include the isolated and non-isolated type of topologies. Isolated ones use transformers and have Forward, Fly back and Push-pull type of structures [7], [8]. With the inherent capability to improve the gain, an isolated converter suffers from high input current ripples, core saturation, and sometimes voltage spikes across switches [3]. ...
... where χ is the normalized time constant of the inductor. From (8) and (15), the boundary operating condition for the converter is determined which is aiding to design the converter in an appropriate manner with most suitable devices, ...
... The proposed converter involves split duty leading to several features. The high gain has also been realized in some converters using transformers or coupled inductors which is highly essential if isolation is sought [7], [8]. However, if no isolation, the converter becomes bulky and costlier. ...
In order to establish an appropriate interaction of a renewable DC generating source such as Photovoltaic or Fuel cells with a DC microgrid, there is need of some DC-DC converter with suitable attributes and features. Imparting high voltage at the low duty ratio is the most demanding quality of such converters. This paper introduces and explains the entire features and behavioral assessment of a novel split duty super boost converter (SDSB) involving switched structure of passive components for a partial contribution in the voltage boosting. The proposed converter is capable of attaining the highest voltage gain without any magnetic coupling, multi-staging/leveling, interleaving, or any complex networking. Additional features of the proposed converter includes its suppleness in duty ratio selection from an extended range, lower voltage stress across switches, low conduction losses, simpler and flexible control as well as enhanced reverse recovery of diodes with a continuous input current. The converter involves three switches where a splitting in duty ratio is realized for many possible positive outcomes including very low duty ratio operation of the switches. Theoretical analysis of the converter is elaborated in CCM, DCM along with the boundary conditions. Later, the performance is justified through developing a hardware prototype of 400 W for the input supply of 24 V.
... This issue highlights the challenges in step-up converters in order to find highly-efficient designs with high gain capabilities. Solutions to this problem have been previously proposed [2][3][4][5], while using complex designs. These new designs involve an increased number of diodes, transistors, capacitors, and coils, which renders the analysis of these systems impractical. ...
The boost-flyback converter is a DC-DC step-up power converter with a wide range of technological applications. In this paper, we analyze the boost-flyback dynamics when controlled via a modified Zero-Average-Dynamics control technique, hereby named Zero-Average-Surface (ZAS). While using the ZAS strategy, it is possible to calculate the duty cycle at each PWM cycle that guarantees a desired stable period-1 solution, by forcing the system to evolve in such way that a function that is constructed with strategical combination of the states over the PWM period has a zero average. We show, by means of bifurcation diagrams, that the period-1 orbit coexists with a stable period-2 orbit with a saturated duty cycle. While using linear stability analysis, we demonstrate that the period-1 orbit is stable over a wide range of parameters and it loses stability at high gains and low loads via a period doubling bifurcation. Finally, we show that, under the right choice of parameters, the period-1 orbit controller with ZAS strategy satisfactorily rejects a wide range of disturbances.
