Closed Loop Control of SEPIC DC-DC Converter Using Loop Shaping Control Technique

Chandan, Bikramaditya; Dwivedi, Prakash; Bose, Sourav

doi:10.1109/icsgrc.2019.8837093

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…Furthermore, as a limitation of the study, the open loop cascaded transfer function of both the filter and DC-DC isolated Ćuk converter have unstable Bode plots. This is the same as the open loop Bode plots of the transfer functions of Ćuk, boost, and SEPIC converters given in [60], [61], [62], [63]. Such unstable Bode plots are usual for power converters having nonminimum phase transfer functions.…”

Section: Discussionmentioning

confidence: 87%

“…By the Bode plot, gain margin is -35.1 dB and phase margin is -23.6°, meaning that the open loop DC-DC isolated Ćuk converter is unstable. Similar Bode plot responses of such a nonminimum phase system resulting in an unstable system are also obtained for Ćuk, boost, and SEPIC converters as in [60], [61], [62], [63]. For filter applications, the passive values of each filter type are calculated by using ( 25), ( 26), ( 27), ( 28), ( 29), ( 32), ( 33), (34) and they are given in Table 2.…”

Section: Lcl Trap Filtermentioning

confidence: 79%

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Analysis of LCL Filter Topologies for DC-DC Isolated Cuk Converter at CCM Operation

Şehirli

2022

IEEE Access

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In this study, the application and analysis of LCL filter topologies including an LCL, an LCL with damping, and an LCL trap filter used by a DC-DC isolated Ćuk converter operated at CCM are presented. The converter is designed for 50 W with 42 kHz switching frequency using a SiC MOSFET as a power switch. Although LCL filter topologies are commonly used with an inverter, their use in DC-DC converters has not been studied in detail. The main contribution of the paper is the application, design, and analysis of an LCL trap filter, which is not presented for a DC-DC converter in the literature, as an input filter of a DC-DC isolated Ćuk converter. For exact analysis of the effect of the filter, as a second main contribution of the paper, a state-space average mathematical model, small signal analysis of an isolated Ćuk converter for CCM operation, which was not presented before in the literature, is derived and its transfer function is obtained. In this paper, the practical design and transfer functions of LCL-based filter topologies are also presented. In order to analyze the effect of filter topologies by using linear methods including root locus and Bode graphs, the transfer function of the converter is cascaded with the transfer function of each filter separately, which is the third contribution of the paper because such analysis has not been presented in the literature. Furthermore, each cascaded transfer function and the transfer function of the converter are validated by step responses. All LCL filters, with an LC filter for comparison, are employed in the experimental setup. Owing to the applications, control characteristics and input current ripples are measured. In addition, the efficiencies of each different structure are determined. As a result of the analysis and measurements, the LCL trap filter gives better results in terms of efficiency (86%) and input current ripple (0.96 A peak). Moreover, the LCL with damping filter gives poorer control characteristics, but the maximum gain of the controller avoiding the instability of LCL with damping is 0.0855, which is higher than that of the others. Furthermore, it is shown that each LCL filter topology provides a 45% lower total inductor value compared to the LC filter.

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Section: Discussionmentioning

confidence: 87%

Section: Lcl Trap Filtermentioning

confidence: 79%

Analysis of LCL Filter Topologies for DC-DC Isolated Cuk Converter at CCM Operation

Şehirli

2022

IEEE Access

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“…Whereas in the switch-off mode, the energy stored in inductor 1 will flow to the capacitor 1. Because the diode is in forwarding conditions, the energy stored in inductor 2 will flow to the capacitor 2 through the diode [23]. Sepic converter topology can be seen in Figure 5.…”

Section: Figure 5 Topology Of Sepic Converter[22]mentioning

confidence: 99%

High Accuracy Electric Water Heater using Adaptive Neuro-Fuzzy Inference System (ANFIS)

Sudiharto

DwiMurdianto²,

Budikarso³

et al. 2022

KINETIK

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Nowadays, water heater is a common household appliance. Water heater can be divided into three types, based on fuel sources: gas, diesel, and electric. Electric water heater is the most common due to its ease of use. The problems that often occur on electric water heater are over-temperature due to user error in setting up the thermostat and inaccurate readings caused by a conventional system control. These problems will cause a surge in power consumption. Over-temperature and conventional control inaccuracies can be overcome using the Artificial Intelligence (AI) control algorithm in the form of an adaptive neuro-fuzzy inference system (ANFIS). The proposed algorithm acts as a control by maintaining the stability of the temperature to obtain more accurate results. An accurate temperature reading can lower power consumption in electric water heater. This study tries to simulate Electric Water Heater temperature control using the ANFIS algorithm until stable readings can be achieved in all temperature settings. Results from disturbance tests in the form of external condition that causes sudden temperature change show that the system can maintain stability with an average error margin of 0.045% and the rate of accuracy of 99.955%.

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“…These transfer functions enable the identification of the converter's response to disturbances in each of its parameters or characteristics. Another representation is the switched model, which comprehensively describes the behavior of a converter and is derived from the operating modes (5,6,7,8,9,10,11,12,13,14). This model is useful for obtaining the converter's small-signal model (4,6,11,13,15,16), which is essential for designing linear controllers (17).…”

Section: Introductionmentioning

confidence: 99%

“…In converter control, output voltage regulation is commonly implemented (3,7,(11)(12)(13)15,16,21,22), to ensure that the converter maintains an approximately constant output voltage despite fluctuations in the input voltage supplying the converter or variations in connected load.…”

Section: Introductionmentioning

confidence: 99%

El convertidor Sepic: modelado y control usando elementos 2 no ideales

Patarroyo-Gutierrez,

González-Niño,

Plazas

2024

inycomp

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En este artículo se describe el procedimiento que permite diseñar un controlador para un convertidor Sepic de 2 kilovatios con elementos no ideales que puede ser usado en aplicaciones industriales. Se obtiene el modelo conmutado del convertidor a partir de los modos de operación, con este se construye el modelo en pequeña señal que permite obtener la función de transferencia necesaria para el diseño del controlador análogo, garantizado un tiempo de establecimiento de 25 ms. Se muestran los resultados de simulación usando MATLAB®/SIMULINK® alrededor del punto de operación realizando perturbaciones a la salida del convertidor y variaciones en el voltaje DC de entrada, evaluando el desempeño del sistema en el dominio temporal. Con el controlador diseñado se satisface la especificación de diseño para las resistencias internas de los inductores hasta 0.3 Ohmnios.

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Closed Loop Control of SEPIC DC-DC Converter Using Loop Shaping Control Technique

Cited by 6 publications

References 13 publications

Analysis of LCL Filter Topologies for DC-DC Isolated Cuk Converter at CCM Operation

Analysis of LCL Filter Topologies for DC-DC Isolated Cuk Converter at CCM Operation

High Accuracy Electric Water Heater using Adaptive Neuro-Fuzzy Inference System (ANFIS)

El convertidor Sepic: modelado y control usando elementos 2 no ideales

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