Input Filter-Based Ripple Injection for Mitigating Limit Cycling in Buck Converters Driving CPL

Roy, Rabisankar; Kapat, Santanu

doi:10.1109/jestpe.2020.2985426

Cited by 8 publications

(3 citation statements)

References 38 publications

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“…Although the LCL flter is very common for inverter circuits, the usage for DC-DC converter is rare and not analyzed in detail in the literature. Passive components of the LCL flter can be designed by using ( 18)- (21) as in [5]. In equations, ω res is the flter angular resonance frequency, f res is the flter resonance frequency, f g is the grid frequency equals to "0" because of DC supply, r is the inductance ratio, L f1 is the input side flter inductance, and L f2 is the output side flter inductance.…”

Section: Lc Filtermentioning

confidence: 99%

“…Reference [17] examines the LCL flter efect for a three-phase PWM converter with the control point of view and [18] examines it for a single-phase inverter. DM LC flter efect to control parameters is examined for the PFC boost converter in [19], for the DC-DC buck converter for the single stage [20] for multistage [21] without taking into account of input DM noises. Also, [22] for the PFC boost converter, transfer functions of active flter topologies without analyzing with linear control methods are presented and the efects to DM noise are compared.…”

Section: Introductionmentioning

confidence: 99%

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Examining the Design of Different Types of DM EMI Filters and Their Effect on EMI Noise and Control Characteristics for Cuk DC-DC Converter

Şehirli

2023

International Transactions on Electrical Energy Systems

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In this paper, DM EMI filters including LC, LC with damping, and Pi and LCL filters are designed for DC-DC Cuk converter operated in BCM. Although, DM EMI is so important for any power converter, the effect of DM filter is not investigated in detail in literature with respect to control characteristics and DM noise reduction. The main contribution of this paper is comparisons of DM EMI filter topologies regarding control characteristics and EMI noise reduction which is not presented in the literature. Another contribution is to give a practical design methodology for EMI filter design avoiding complex mathematical procedures. Besides, the paper designs an LCL filter, popular for inverter applications, for Cuk converter that is not introduced in the literature. Examining the filter effect on the converter from the control point of view is a very complicated issue because a linearized model of the converter which is naturally nonlinear should be obtained. To do so, the converter’s small signal analysis must be derived. Therefore, for examining the effect of filters, a small signal analysis of the Cuk converter is made through an average state-space model. After that, transfer functions of each filter topology are obtained. Lastly, the entire transfer functions of the system using both the Cuk converter and each filter are acquired, separately. By using the transfer functions of overall systems, the effect of each filter topology is investigated by root locus and bode plots. Moreover, experimental verification of all filters is realized over a 15 W Cuk converter with a 25 kHz switching frequency. It is validated by applications that the LCL filter provides better control characteristics on the Cuk converter, the total inductor value is reduced by 30% and the total capacitor value is reduced by 25% compared to other filters. However, with respect to DM noise Pi and LC filters give better results.

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Section: Lc Filtermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Examining the Design of Different Types of DM EMI Filters and Their Effect on EMI Noise and Control Characteristics for Cuk DC-DC Converter

Şehirli

2023

International Transactions on Electrical Energy Systems

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“…Stability analysis of LC-based filters with different damping structures is realized in [52] for DC-DC converters without considering the converter transfer function. Stability analysis and active stabilization for constant power loads are presented by using an LC filter with a DC-DC buck converter in [53], [54] and for a boost converter in [55]. [56] presents Lyapunov-based control of a DC-DC boost converter using an LC filter by integrating a filter mathematical model.…”

Section: Introductionmentioning

confidence: 99%

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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Improvement in the Stability of DC Electrical Power Distribution Systems in More Electric Aircraft

Phosung,

Areerak,

Areerak

2024

IEEE Access

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Input Filter-Based Ripple Injection for Mitigating Limit Cycling in Buck Converters Driving CPL

Cited by 8 publications

References 38 publications

Examining the Design of Different Types of DM EMI Filters and Their Effect on EMI Noise and Control Characteristics for Cuk DC-DC Converter

Examining the Design of Different Types of DM EMI Filters and Their Effect on EMI Noise and Control Characteristics for Cuk DC-DC Converter

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

Improvement in the Stability of DC Electrical Power Distribution Systems in More Electric Aircraft

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