Effect of Class 2 Ceramic Capacitor Variations on Switched-Capacitor and Resonant Switched-Capacitor Converters

Xu, Jiale; Li, Gu; Rivas-Davila, Juan

doi:10.1109/jestpe.2019.2951807

Cited by 31 publications

(29 citation statements)

References 10 publications

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“…Table 4 reports the voltage rating of the devices according to ( 19)-( 22) and ( 28)- (32), where a value of D equal to 0.1 was considered as the worst case, considering that under this value, the power load curve quickly reaches zero, as highlighted by Figure 19.…”

Section: Discussionmentioning

confidence: 99%

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A Model of DC-DC Converter with Switched-Capacitor Structure for Electric Vehicle Applications

et al. 2022

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In this paper, a DC-DC converter with an innovative topology for automotive applications is proposed. The goal of the presented power converter is the electrical storage system management of an electric vehicle (EV). The presented converter is specifically compliant with a 400 V battery, which represents the high-voltage primary source of the system. This topology is also able to act as a bidirectional power converter, so that in this case, the output section is an active stage, which is able to provide power as, for example, in the case of a low-voltage battery or a supercapacitor. The proposed topology can behave either in step-down or in step-up mode, presenting in both cases a high gain between the input and output voltage. Simulation results concerning the proposed converter, demonstrating the early feasibility of the system, were obtained in a PowerSIM environment and are described in this paper.

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Section: Discussionmentioning

confidence: 99%

“…The topology of the converter presented Energies 2022, 15, 1224 3 of 20 in [28] offers continuous current waveforms at the terminal sections, with relatively low complexity, but it is unidirectional. Complex topologies and analytical methods regarding switched-capacitor converters are presented in [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

A Model of DC-DC Converter with Switched-Capacitor Structure for Electric Vehicle Applications

et al. 2022

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“…15 shows the circuit diagram of an LLC resonant DC/DC converter, and Table II shows the key parameters of the converter. Assume that the resonant capacitance varies between 80% to 120% of the nominal value due to part-to-part difference and capacitor aging [30] - [31]. The control objective is to regulate the output voltage Vo to be a constant.…”

Section: A System Modeling and Weighting Function Selectionmentioning

confidence: 99%

A Robust Controller Design Methodology Addressing Challenges Under System Uncertainty

Korada

Qin

2022

IEEE Open J. Power Electron.

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This paper proposes a generalized design methodology of a robust controller to mitigate the impact of system uncertainty on controller stability and performance which includes steady-state error, disturbance rejection, high-frequency noise attenuation and speed of dynamic response. The first step is to select the weighting functions that bound the transfer functions for the entire range of uncertainty. The second step is to form mathematical representation for both robust stability and robust performance. The third step is to conduct the robust H-infinity controller synthesis to generate the full-order controller, and then carry out order reduction and recheck of the design objectives. The last step is to select an optimized controller based on the multi-dimensional Pareto Front algorithm. The proposed method has been firstly applied to the current controller design of a grid-connected inverter with variable grid impedance, and secondly to the voltage controller design of an LLC resonant DC/DC converter with variable resonant capacitance. The results indicate that the selected optimal H-infinity controller has an overall more satisfactory performance in terms of stability, steady-state error, disturbance/noise rejection capability and dynamic performance, compared with conventional PI and PR controllers when there is a large variation of system parameters.

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“…Charger semakin cepat maka temperature pada sirkuit charger mobil listrik akan tinggi (Yan, dkk., 2018) (Jia, dkk., 2018), jika kapasitor mengalami suatu kondisi dengan temperature tinggi epoxy yang melindungi kapasitor akan mengalami kerusakan sehingga akan sangat berbahaya, lalu faktor kelembaban memiliki tingkat yang berbeda-beda. Sehingga komponen kapasitor harus dilindungi menggunakan epoxy yang kuat terhadap tingkat kelembaban sehingga komponen kapasitor yang dilindungi oleh epoxy tidak mengalami kerusakan (Xu, 2020). Selanjutnya kebocoran arus listrik terjadi karena rusaknya lapisan epoxy yang menyebabkan arus listrik menyebar pada sekitar kapasitor (Shieddieque, 2017;Teverovsky, 2017) Epoxy powder digunakan untuk pelapisan kapasitor yang biasa digunakan sebagai bahan perekat ataupun cat untuk berbagai material (Sadeer M. Majeed, 2020).…”

Section: Pendahuluanunclassified

Analisis Ketahanan Material Epoxy Powder EF150AB pada Uji Thermal Shock untuk Komponen Charger Mobil Listrik

et al. 2021

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Inside the electric car charger there is a controller where one of the components is the Disc Ceramic Capacitor (DCC) type SCF2E472M10 coated with epoxy powder EF150AB. The faster the charging, the higher the temperature, for that we need good performance on the capacitor layer. The method used in this study is to test the Pressure Cycle Temperature (PCT) with a temperature of 121 ° C, a pressure of 2 bar and a holding time of 48 hours and a Thermal Shock Test with a temperature parameter of -40 ° C to 125 ° C for each temperature change. 30 minutes for 100 hours, the number of test samples for each test is 20. From the test results, it was found that the average capacitance value on the PCT test was 4439.9 pF with a standard limit value of 3760 to 5640 pF, then the average value of Insulation resistance (IR) after the PCT test was 14183 Ω with the standard limit of the IR value of 10000 Ω. From these results it can be concluded that epoxy powder EF150AB is good for DCC coatings because the coating is resistant to low and high temperatures, which ranges from -40 ° C to 125 ° C.

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Effect of Class 2 Ceramic Capacitor Variations on Switched-Capacitor and Resonant Switched-Capacitor Converters

Cited by 31 publications

References 10 publications

A Model of DC-DC Converter with Switched-Capacitor Structure for Electric Vehicle Applications

A Model of DC-DC Converter with Switched-Capacitor Structure for Electric Vehicle Applications

A Robust Controller Design Methodology Addressing Challenges Under System Uncertainty

Analisis Ketahanan Material Epoxy Powder EF150AB pada Uji Thermal Shock untuk Komponen Charger Mobil Listrik

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