Статті в журналах: "High Frequency Planar Transformer"

1

Tria, Lew Andrew R., Daming Zhang, and John E. Fletcher. "High-Frequency Planar Transformer Parameter Estimation." IEEE Transactions on Magnetics 51, no. 11 (November 2015): 1–4. http://dx.doi.org/10.1109/tmag.2015.2443791.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

2

Fu Wong and Junwei Lu. "High frequency planar transformer with helical winding structure." IEEE Transactions on Magnetics 36, no. 5 (2000): 3524–26. http://dx.doi.org/10.1109/20.908886.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

3

Shen, Zhan, Bingxin Xu, Chenglei Liu, Cungang Hu, Bi Liu, Zhike Xu, Long Jin, and Wu Chen. "The Modeling and Simplification of a Thermal Model of a Planar Transformer Based on Internal Power Loss." Sustainability 14, no. 19 (September 21, 2022): 11915. http://dx.doi.org/10.3390/su141911915.

Повний текст джерела

Анотація:

With the development of high-performance wide-band-gap devices and increasing converter frequency, planar transformers are widely used in high-frequency and high-power-density power conversions. Due to the skin effect and proximity effect, accurate thermal analysis and a simplified thermal model of planar transformers are needed for quick thermal verification as well as system design. This paper proposes two thermal simplification models based on the planar transformer’s thermal impedance network. The internal power loss and thermal coupling between each component are first analyzed. Then, based on thermal radiation theory, the simplified thermal model of the planar transformer is presented. It only requires the input of the total power loss of the planar transformer to calculate the temperature rise, and it does not need the power loss of each component. Finally, the simulation and experimental verification are carried out on a MHz prototype.

Стилі APA, Harvard, Vancouver, ISO та ін.

4

Ma, Yu, and Zhaoming Qian. "A Hybrid Equivalent Model of High Frequency Planar Transformer." Journal of Nanoelectronics and Optoelectronics 12, no. 8 (August 1, 2017): 795–97. http://dx.doi.org/10.1166/jno.2017.2138.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

5

Orosz, Tamás, Mariusz Stępień, and Peter Poór. "Design Analysis of High Frequency Linear Transformer with Ārtap Framework." Periodica Polytechnica Electrical Engineering and Computer Science 65, no. 2 (April 19, 2021): 146–51. http://dx.doi.org/10.3311/ppee.17488.

Повний текст джерела

Анотація:

This paper presents the design and a design analysis of a coaxial, linear transformer. This is a novel high frequency transformer concept for energy conversion. The examined transformer was designed for 1 MHz nominal frequency. One of the main advantages of the proposed transformer design is its simple winding system. It contains only two coaxial copper tubes, which can be easily manufactured and modeled with high precision. One of the key design tasks is the minimization of the leakage inductance. The inductance of the straight coils depends on the ratio of the height and the diameter of the coil. Therefore, a three-dimensional FEM analysis is sufficient to calculate the optimal length of the linear transformer. The planar 2D model and the 3D model of the transformer are presented in this paper. The accuracy of the 2D and 3D calculation results were compared to each other and to the measurements to show the applicability of the planar 2D models. Moreover, the sensitivity of the losses and the leakage inductance with respect to the winding parameters is presented. The dependencies of the design variables on the performance parameters, such as the power mass density and the leakage inductance of this transformer concept were examined. It was shown that the value of the leakage inductance is a linear function of the ratio of the length and the diameter of the transformer windings.

Стилі APA, Harvard, Vancouver, ISO та ін.

6

Morrill, M. A., V. A. Caliskan, and C. Q. Lee. "High-frequency planar power transformers." IEEE Transactions on Power Electronics 7, no. 3 (July 1992): 607–13. http://dx.doi.org/10.1109/63.145149.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

7

Thomy, Simon, Xavier Margueron, Jean-Sylvio Ngoua Teu Magambo, Reda Bakri, and Philippe Le Moigne. "Conception of High-Frequency Power Planar Transformer Prototypes Based on FabLab Platform." Electricity 3, no. 1 (December 21, 2021): 1–15. http://dx.doi.org/10.3390/electricity3010001.

Повний текст джерела

Анотація:

Conceiving planar magnetic components for power electronic converters is very constraining, especially in the case of prototype development. Indeed, such making requires skills, specific appliances as well as human time for setting up the machine tools and the fabrication process. With the emergence of Fabrication Laboratory (FabLab), conceiving of planar copper foil prototypes becomes more feasible in a shortened time process for engineers and researchers. This paper presents a methodology and process for conceiving power planar transformers with the help of machines and tools that can be found in the usual FabLab.

Стилі APA, Harvard, Vancouver, ISO та ін.

8

Ding, Xiao Dong, and Yan An Wang. "Prototype Design of Rectifier Transformer for High Power Density." Applied Mechanics and Materials 313-314 (March 2013): 797–803. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.797.

Повний текст джерела

Анотація:

The traditional high-voltage high-frequency transformer has a drawback of low power density due to the rigorous requirements of high voltage insulation. This paper proposes a new configuration for the magnetic core based on planar EE cores. The parallel connection of planar cores was adopted as a unit, and several units were cascaded to form the high-voltage transformer. The electrical potential distribution of the proposed transformer is more uniform than a traditional transformer, and enables a decrease in the insulation distances. The mechanical configuration of a laboratory prototype is discussed, as well as the electrical, parasitic, and thermal behaviors.

Стилі APA, Harvard, Vancouver, ISO та ін.

9

Lee, Dae-Woo, Ji-Hoon Lim, Dong-In Lee, and Han-Shin Youn. "A High-Power-Density Active-Clamp Converter with Integrated Planar Transformer." Energies 15, no. 15 (August 2, 2022): 5609. http://dx.doi.org/10.3390/en15155609.

Повний текст джерела

Анотація:

This paper proposes an active-clamp forward-flyback (ACFF) converter with an integrated planar transformer for wide-input voltage and high-output current applications, such as low-voltage direct-current (LDC) converters in electric vehicles. An integrated planar transformer that consists of a forward-flyback transformer, single primary winding, and efficient structure of secondary windings is adopted for the proposed converter, and since this transformer is implemented with a common four-layer printed circuit board (PCB) winding, a high power density and low cost of the proposed converter can be achieved. In addition, due to the low leakage inductance induced by the planar transformer, a reduced commutation period can be achieved, and it is possible to increase the switching frequency resulting in low volume of transformer. Although the integrated planar transformer has relatively high conduction loss, the active-clamp topology can significantly reduce the conduction loss on switches compared with widely used full-bridge (FB) converters because it only utilizes two switches and shows the low circulating current. As a result, the proposed converter with an integrated planar transformer has strengths in high power density and cost competitiveness without degraded efficiency, and it is a very attractive topology for LDC converters and other applications that require wide-input voltage and high-output current.

Стилі APA, Harvard, Vancouver, ISO та ін.

10

van der Linde, D., C. A. M. Boon, and J. B. Klaassens. "Design of a high-frequency planar power transformer in multilayer technology." IEEE Transactions on Industrial Electronics 38, no. 2 (April 1991): 135–41. http://dx.doi.org/10.1109/41.88907.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

11

BARLIK, Roman. "Determination of the basic parameters of the high-frequency planar transformer." PRZEGLĄD ELEKTROTECHNICZNY 1, no. 6 (June 5, 2016): 73–80. http://dx.doi.org/10.15199/48.2016.06.13.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

12

Li, Mingxiao, Ziwei Ouyang, and Michael A. E. Andersen. "High-Frequency LLC Resonant Converter With Magnetic Shunt Integrated Planar Transformer." IEEE Transactions on Power Electronics 34, no. 3 (March 2019): 2405–15. http://dx.doi.org/10.1109/tpel.2018.2842029.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

13

Sikorski, Wojciech, Krzysztof Walczak, Wieslaw Gil, and Cyprian Szymczak. "On-Line Partial Discharge Monitoring System for Power Transformers Based on the Simultaneous Detection of High Frequency, Ultra-High Frequency, and Acoustic Emission Signals." Energies 13, no. 12 (June 24, 2020): 3271. http://dx.doi.org/10.3390/en13123271.

Повний текст джерела

Анотація:

The article presents a novel on-line partial discharge (PD) monitoring system for power transformers, whose functioning is based on the simultaneous use of three unconventional methods of PD detection: high-frequency (HF), ultra-high frequency (UHF), and acoustic emission (AE). It is the first monitoring system equipped in an active dielectric window (ADW), which is a combined ultrasonic and electromagnetic PD sensor. The article discusses in detail the process of designing and building individual modules of hardware and software layers of the system, wherein the most attention was paid to the PD sensors, i.e., meandered planar inverted-F antenna (MPIFA), high-frequency current transformer (HFCT), and active dielectric window with ultrasonic transducer, which were optimized for detection of PDs occurring in oil-paper insulation. The prototype of the hybrid monitoring system was first checked on a 330 MVA large power transformer during the induced voltage test with partial discharge measurement (IVPD). Next, it was installed on a 31.5 MVA substation power transformer and integrated according to the standard IEC 61850 with SCADA (Supervisory Control and Data Acquisition) system registering voltage, active power, and oil temperature of the monitored unit. The obtained results showed high sensitivity of the manufactured PD sensors as well as the advantages of the simultaneous use of three techniques of PD detection and the possibility of discharge parameter correlation with other power transformer parameters.

Стилі APA, Harvard, Vancouver, ISO та ін.

14

Petrescu, Lucian-Gabriel, Maria-Catalina Petrescu, Emil Cazacu, and Catalin-Daniel Constantinescu. "Estimation of Energy Losses in Nanocrystalline FINEMET Alloys Working at High Frequency." Materials 14, no. 24 (December 15, 2021): 7745. http://dx.doi.org/10.3390/ma14247745.

Повний текст джерела

Анотація:

Soft magnetic materials are at the core of electromagnetic devices. Planar transformers are essential pieces of equipment working at high frequency. Usually, their magnetic core is made of various types of ferrites or iron-based alloys. An upcoming alternative might be the replacement the ferrites with FINEMET-type alloys, of nominal composition of Fe73.5Si13.5B9Cu3Nb1 (at. %). FINEMET is a nanocrystalline material exhibiting excellent magnetic properties at high frequencies, a soft magnetic alloy that has been in the focus of interest in the last years thanks to its high saturation magnetization, high permeability, and low core loss. Here, we present and discuss the measured and modelled properties of this material. Owing to the limits of the experimental set-up, an estimate of the total magnetic losses within this magnetic material is made, for values greater than the measurement limits of the magnetic flux density and frequency, with reasonable results for potential applications of FINMET-type alloys and thin films in high frequency planar transformer cores.

Стилі APA, Harvard, Vancouver, ISO та ін.

15

Panchal, Chirag, and Jun-Wei Lu. "High Frequency Planar Transformer (HFPT) for Universal Contact-Less Battery Charging Platform." IEEE Transactions on Magnetics 47, no. 10 (October 2011): 2764–67. http://dx.doi.org/10.1109/tmag.2011.2156768.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

16

Lu, Junwei, and Francis Dawson. "Characterizations of High Frequency Planar Transformer With a Novel Comb-Shaped Shield." IEEE Transactions on Magnetics 47, no. 10 (October 2011): 4493–96. http://dx.doi.org/10.1109/tmag.2011.2157664.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

17

Water, Wayne, and Junwei Lu. "Improved High-Frequency Planar Transformer for Line Level Control (LLC) Resonant Converters." IEEE Magnetics Letters 4 (2013): 1–4. http://dx.doi.org/10.1109/lmag.2013.2284767.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

18

La Ganga, Alessandro, Roberto Re, and Paolo Guglielmi. "Input Parallel Output Series Structure of Planar Medium Frequency Transformers for 200 kW Power Converter: Model and Parameters Evaluation." Energies 14, no. 5 (March 7, 2021): 1450. http://dx.doi.org/10.3390/en14051450.

Повний текст джерела

Анотація:

Nowadays, the demand for high power converters for DC applications, such as renewable sources or ultra-fast chargers for electric vehicles, is constantly growing. Galvanic isolation is mandatory in most of these applications. In this context, the Solid State Transformer (SST) converter plays a fundamental role. The adoption of the Medium Frequency Transformers (MFT) guarantees galvanic isolation in addition to high performance in reduced size. In the present paper, a multi MFT structure is proposed as a solution to improve the power density and the modularity of the system. Starting from 20kW planar transformer model, experimentally validated, a multi-transformer structure is analyzed. After an analytical treatment of the Input Parallel Output Series (IPOS) structure, an equivalent electrical model of a 200kW IPOS (made by 10 MFTs) is introduced. The model is validated by experimental measurements and tests.

Стилі APA, Harvard, Vancouver, ISO та ін.

19

Barlik, Roman, Mieczysław Nowak, Piotr Grzejszczak, and Mariusz Zdanowski. "Estimation of power losses in a high-frequency planar transformer using a thermal camera." Archives of Electrical Engineering 65, no. 3 (September 1, 2016): 613–27. http://dx.doi.org/10.1515/aee-2016-0044.

Повний текст джерела

Анотація:

Abstract This paper presents the implementation of a thermal camera for the quantitative estimation of power losses in a high frequency planar transformer (100 kHz/ 5600 VA). The methodology is based on the observation of the transient temperature rise and determination of the power losses by means of curves representing the derivative of temperature as a function of power losses dissipated in the transformer. First, the thermal calibration characteristics had to be obtained from a simple experiment, where power losses are generated by DC current in the ferrite core and windings. Next, experimental investigations focused on the determination of the transformer power losses for a short circuit and no load, with a resistive load and with the rectifier as a load were carried out. Finally, to verify the obtained results, analytical calculations based on Dowell’s and modified Steinmetz’s equations were additionally made, which showed a good convergence. The proposed method is easy to implement and can be used as an alternative to the calorimetric method which is time-consuming and requires a complicated measurement setup.

Стилі APA, Harvard, Vancouver, ISO та ін.

20

Wu, Liang, Long Xiao, Jun Zhao, and Guozhu Chen. "Modelling and optimisation of planar matrix transformer for high frequency regulated LLC converter." IET Power Electronics 13, no. 3 (January 14, 2020): 516–24. http://dx.doi.org/10.1049/iet-pel.2019.0397.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

21

Yoo, Jae-Gon, and Jong-Soo Kim. "Design and Analysis of 10kW High-frequency Planar Transformer for Arc Welding Machine." Transactions of The Korean Institute of Electrical Engineers 71, no. 12 (December 31, 2022): 1780–86. http://dx.doi.org/10.5370/kiee.2022.71.12.1780.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

22

Tsujimoto, H., and O. Ieyasu. "High frequency transmission characteristic of co-planar film transformer fabricated on flexible polyamide film." IEEE Transactions on Magnetics 31, no. 6 (1995): 4232–34. http://dx.doi.org/10.1109/20.489936.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

23

Guarín, Sebastián, Sergio Velarde, Edwin Castaño, and Alexander Molina-Cabrera. "Construction and Simulation of a Planar Transformer Prototype." Transactions on Energy Systems and Engineering Applications 2, no. 2 (December 15, 2021): 1–7. http://dx.doi.org/10.32397/tesea.vol2.n2.1.

Повний текст джерела

Анотація:

This paper illustrates the design and building of a planar transformer prototype with a 1:1 transformation ratio for high-frequency applications in power electronics. By using reference literature and considering the ferrite core dimensions, the windings were conceived and exported to Gerber format using PCB design software. The transformer prototype was then assembled and tested under laboratory conditions for frequencies from 800 Hz to 5 MHz, which showed a sinusoidal wave at the transformer output from 1.3 kHz onwards and a better performance starting at 10 kHz, where the loses were significantly reduced and the transformation ratio was closer to the originally designed. As a final step, a finite element method (FEM) análisis was carried out to understand the electromagnetic flux behavior using a 3D Multiphysics simulation software. The 3d building process and details are explained step by step and the resulting magnetic flux density is graphically shown for the core and the windings.

Стилі APA, Harvard, Vancouver, ISO та ін.

24

Yunas, Jumril, and Yeop Majlis Burhanuddin. "Microfabrication of Sandwich Micro-Transformers." Advanced Materials Research 314-316 (August 2011): 1836–40. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1836.

Повний текст джерела

Анотація:

A new planar micro-transformer having sandwich spiral coil structure is fabricated using MEMS micro-fabrication technique. Stack interwinding coil is designed to achieve high coupling and higher winding number at relatively small coil area. In this work, stack sandwich interwinding coil structure is fabricated by bonding the substrates of the coil at connection pads using conductive epoxy material. This method replaces the use of conventional via connections that cause the most problem of current conductance in planar structures. The inductance of fabricated coil are measured at wide range of operating frequency using cascade GSG probe. The results show that the proposed technique is an alternative way in fabricating a simple and cost effective 3-dimensional structure of stack micro-transformer.

Стилі APA, Harvard, Vancouver, ISO та ін.

25

Cornwell, A. R. "The Characterisation of High Frequency Planar Thick‐film Transformers." Microelectronics International 12, no. 1 (January 1995): 25–26. http://dx.doi.org/10.1108/eb044553.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

26

Yongtao Han, W. Eberle, and Yan-Fei Liu. "A Practical Copper Loss Measurement Method for the Planar Transformer in High-Frequency Switching Converters." IEEE Transactions on Industrial Electronics 54, no. 4 (August 2007): 2276–87. http://dx.doi.org/10.1109/tie.2007.899877.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

27

Ji, Ziyi, Fuhong Min, Yiping Dou, Ziqing Cao, and Xinya Li. "Optimization of key power loss for LLC circuits with planar transformer in high-frequency and high-power scenarios." AIP Advances 11, no. 5 (May 1, 2021): 055119. http://dx.doi.org/10.1063/5.0054159.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

28

Lu, J. W., F. P. Dawson, and S. Yamada. "Analysis of high frequency planar sandwich transformers for switching converters." IEEE Transactions on Magnetics 31, no. 6 (1995): 4235–37. http://dx.doi.org/10.1109/20.489937.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

29

Petrescu, Lucian-Gabriel, Maria-Cătălina Petrescu, Valentin Ioniță, Emil Cazacu, and Cătălin-Daniel Constantinescu. "Magnetic Properties of Manganese-Zinc Soft Ferrite Ceramic for High Frequency Applications." Materials 12, no. 19 (September 27, 2019): 3173. http://dx.doi.org/10.3390/ma12193173.

Повний текст джерела

Анотація:

A soft magnetic MnZn-type ferrite is considered for high frequency applications. First, the morphological, structural, and chemical composition of the material are presented and discussed. Subsequently, by using a vibrating sample magnetometer (VSM), the hysteresis loops are recorded. The open magnetic circuit measurements are corrected by employing demagnetization factors, and by taking into consideration the local magnetic susceptibility. Finally, the hysteresis losses are estimated by the Steinmetz approach, and the results are compared with available commercial information provided by selected MnZn ferrite manufacturers. Such materials are representative in planar inductor and transformer cores due to their typically low losses at high frequency, i.e., up to several MHz, in low-to-medium power applications and providing high efficiency of up to 97%–99%.

Стилі APA, Harvard, Vancouver, ISO та ін.

30

Fu, Kaining, Wei Chen, and Subin Lin. "A General Transformer Evaluation Method for Common-Mode Noise Behavior." Energies 12, no. 10 (May 23, 2019): 1984. http://dx.doi.org/10.3390/en12101984.

Повний текст джерела

Анотація:

In isolated power converters, the transformer is a key part of voltage transformation and isolation. Since common-mode (CM) noise is rather difficult to suppress compared with different-mode (DM) noise, more and more scholars are paying attention to the characteristics of CM noise, especially in high-frequency CM noise behaviors. CM noise can be further divided into conducted CM noise and radiated CM noise, and the main focus of this paper is on conducted CM noise. The CM coupling capacitance of the transformer is one of the main contributors of CM noise, which has been verified in many previous studies. Hence, eliminating the CM noise in a transformer coupling path can significantly lower the whole CM noise level of the converter. Professional conducted electromagnetic interference (EMI) testing instruments are quite expensive. In this paper, a general transformer evaluation technique for CM noise behavior is proposed. Only a signal generator and oscilloscope can achieve transformer CM noise behavior evaluation. PCB planar flyback transformers are designed, and a series of noise spectrums and voltage waveforms can verify the effectiveness of the proposed transformer evaluation method. The flyback adapter porotype can pass the EMI standard limited line EN55022 class B by the proposed evaluation method.

Стилі APA, Harvard, Vancouver, ISO та ін.

31

Sui, Yanlin, Tao Yu, Longqi Wang, Zhi Wang, Ke Xue, Yuzhu Chen, Xin Liu, and Yongkun Chen. "Analysis of a Capacitive Sensing Circuit and Sensitive Structure Based on a Low-Temperature-Drift Planar Transformer." Sensors 22, no. 23 (November 29, 2022): 9284. http://dx.doi.org/10.3390/s22239284.

Повний текст джерела

Анотація:

In space gravitational-wave-detection missions, inertial sensors are used as the core loads, and their acceleration noise needs to reach 3×10−15 ms−2/Hz at a frequency of 0.1 mHz, which corresponds to the capacitive sensing system; the capacitive sensing noise on the sensitive axis needs to reach 1 aF/Hz. Unlike traditional circuit noise evaluation, the noise in the mHz frequency band is dominated by the thermal noise and the 1/f noise of the device, which is a challenging technical goal. In this paper, a low-frequency, high-precision resonant capacitor bridge method based on a planar transformer is used. Compared with the traditional winding transformer, the developed planar transformer has the advantages of low temperature drift and low 1/f noise. For closed-loop measurements of capacitive sensing circuits and sensitive structures, the minimum capacitive resolution in the time domain is about 3 aF, which is far lower than the scientific measurement resolution requirement of 5.8 fF for gravitational wave detection. The capacitive sensing noise is converted to 1.095 aF/Hz in the frequency band of 10 mHz–1 Hz. Although there is a gap between the closed-loop measurement results and the final index, the measurement environment is an experimental condition without temperature control on the ground; additionally, in China, the measurement integrity and actual measurement results of the capacitive sensing function have reached a domestic leading level. This is the realization of China’s future space gravitational wave exploration.

Стилі APA, Harvard, Vancouver, ISO та ін.

32

Barlik, R., M. Nowak, P. Grzejszczak, and M. Zdanowski. "Analytical description of power losses in a transformer operating in the dual active bridge converter." Bulletin of the Polish Academy of Sciences Technical Sciences 64, no. 3 (September 1, 2016): 561–74. http://dx.doi.org/10.1515/bpasts-2016-0063.

Повний текст джерела

Анотація:

Abstract The paper presents an analytical approach to the determination of power losses in a high-frequency transformer operating in the dual active bridge (DAB). This transformer, having two single-phase transistor bridge inverters, couples two DC circuits that significantly differ in voltages (280 V and 51 V ±20%). Power losses in the core and windings of the planar transformer 5600 VA /100 kHz were calculated taking into account changes in the value and direction of the energy flow between the coupled DC circuits. These circuits represent storage or renewable energy sources and intermediate circuits of the converters used in distributed generation systems. Calculations were performed using the Steinmetz’s and Dowell’s equations. The analytical results have been verified experimentally.

Стилі APA, Harvard, Vancouver, ISO та ін.

33

Shafaei, Rouhollah, Maria Celeste Garcia Perez, and Martin Ordonez. "Planar Transformers in LLC Resonant Converters: High-Frequency Fringing Losses Modeling." IEEE Transactions on Power Electronics 35, no. 9 (September 2020): 9632–49. http://dx.doi.org/10.1109/tpel.2020.2971424.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

34

Jolly, Nitish. "Multi-Constraint Optimization and Co-Design of a 2-MHz All-GaN Based 700 W 95.6% Efficient LLC Converter." CPSS Transactions on Power Electronics and Applications 7, no. 3 (September 30, 2022): 259–72. http://dx.doi.org/10.24295/cpsstpea.2022.00024.

Повний текст джерела

Анотація:

This paper analyzes and develops a multi-variable & multi-constraint design optimization approach with the goal of minimizing power losses in a 2 MHz LLC resonant converter for next-generation data center applications. For a thorough co- design of a multi-MHz resonant converter, intricately curated performance constraints and associated design-based trade-offs are presented. In addition, accurate characterization, and parametric minimization of the AC resistance by optimal selection of transformer winding configuration, while achieving a controllable leakage flux for the resonant inductor integration into the high frequency planar transformer (HFPT) thereby reducing the effective winding losses by 6%. An all-GaN based 700 W, high power density (6.2 W/cm3) experimental proof-of-concept was built for a conversion from a variable input bus voltage (380–420 V) to 12 V stiff output at a resonant frequency of 2 MHz. The results portrayed a steady state peak efficiency of 95.65%, with an improvement of 2.2% over the state-of-the-art (SOA) operable at MHz frequency

Стилі APA, Harvard, Vancouver, ISO та ін.

35

Arshak, K. I., and B. Almukhtar. "The design and development of a novel flyback planar transformer for high frequency switch mode DC–DC converter applications." Microelectronics Journal 31, no. 11-12 (December 2000): 929–35. http://dx.doi.org/10.1016/s0026-2692(00)00099-9.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

36

Slah, Farhani, Amari Mansour, Aouiti Abdelkarim, and Faouzi Bacha. "Analysis and Design of an LC Parallel-Resonant DC–DC Converter for a Fuel Cell Used in an Electrical Vehicle." Journal of Circuits, Systems and Computers 27, no. 08 (April 12, 2018): 1850119. http://dx.doi.org/10.1142/s0218126618501190.

Повний текст джерела

Анотація:

In this paper, the design methodology of a parallel-resonant [Formula: see text] converter for fuel cell applications in the electric vehicle is proposed in order to achieve high efficiency. Although the converter is unidirectional, it is interposed between the fuel cell and the DC link. Additionally, the converter is made up of two full bridges, an [Formula: see text] resonant filter and a planar transformer. The use of a high-frequency transformer enables to minimize the converter size and the weight, to produce a higher voltage in the secondary side from an input voltage (fuel cell) and to isolate the full bridges. Furthermore, the rectifier diodes operate with a zero-current switching. Therefore, an experimental converter prototype has been designed, simulated, built and tested in the laboratory. Finally, a prototype having 30[Formula: see text]V as an input and 150[Formula: see text]V as an output with 500[Formula: see text]W is designed to demonstrate and analyze the proposed converter.

Стилі APA, Harvard, Vancouver, ISO та ін.

37

Hariya, Akinori, Ken Matsuura, Hiroshige Yanagi, Satoshi Tomioka, Yoichi Ishizuka, and Tamotsu Ninomiya. "Considerations of Physical Design and Implementation for 5 MHz-100 W LLC Resonant DC-DC Converters." Active and Passive Electronic Components 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/4027406.

Повний текст джерела

Анотація:

Recently, high power-density, high power-efficiency, and wide regulation range isolated DC-DC converters have been required. This paper presents considerations of physical design and implementation for wide regulation range MHz-level LLC resonant DC-DC converters. The circuit parameters are designed with 3–5 MHz-level switching frequency. Also, the physical parameters and the size of the planar transformer are optimized by using derived equations and finite element method (FEM) with Maxwell 3D. Some experiments are done with prototype LLC resonant DC-DC converter using gallium nitride high electron mobility transistors (GaN-HEMTs); the input voltage is 42–53 V, the reference output voltage is 12 V, the load current is 8 A, the maximum switching frequency is about 5 MHz, the total volume of the circuit is 4.1 cm3, and the power density of the prototype converter is 24.4 W/cc.

Стилі APA, Harvard, Vancouver, ISO та ін.

38

Besri, A., B. Delinchant, J. P. Keradec, and C. R. Sullivan. "Simulation and optimization tool for high-frequency planar transformers based on 1D analytical modeling." International Journal of Applied Electromagnetics and Mechanics 30, no. 3-4 (September 4, 2009): 223–36. http://dx.doi.org/10.3233/jae-2009-1023.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

39

Kannan, G. "A High Frequency Converter for EV Application." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 1 (January 1, 2018): 5. http://dx.doi.org/10.11591/ijeecs.v9.i1.pp5-11.

Повний текст джерела

Анотація:

An electrical vehicle (EV) is advancing as alternative power trains for green transportation. the DC–DC converter for auxiliary power supply of electric loads .In this paper presented a new topologyof high frequency converter for electric vehicle was proposed,This converter has to be capable of handling the energy transfer from the 28V DC bus and the 550 high voltage DC bus (used for the electric traction). The control strategy is phase shift of the full bridge converter. Using this topology we reduce the switching losses. Conventional converter at two levels of voltage by only one full bridge converter using two planar transformers in high frequency the primary are coupled in parallel and the secondary are in series. We minimized the size and the weight of the converter. The high frequency converter advantages in terms of cost, efficiency, flexibility, and increased due to the possibility of easy synchronous rectification implementation.

Стилі APA, Harvard, Vancouver, ISO та ін.

40

Ihle, Martin, Uwe Partsch, Sindy Mosch, and Adrian Goldberg. "Aerosol Printing of High Resolution Films for LTCC-Multilayer Components." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (September 1, 2012): 000071–76. http://dx.doi.org/10.4071/cicmt-2012-ta25.

Повний текст джерела

Анотація:

For the electronic packaging of sensor stable and cost-efficient fine-line printing technologies on LTCC and high frequency laminates are needed. Especially common technologies like screen printing and thin film techniques are unsuitable for fine structures or too expensive. In addition there is no direct write technology for 3D-LTCC-designs as well as for high reliability Co-firing structures. Closing this gap the aerosol printing technology is used to print high resolution conductors on planar and non-planar substrates. Aerosol printing is a direct write non-contact printing technology of functional layers. After a pneumatic atomization the ink is transformed into 1 to 5 μm droplets. The resulting, continuous aerosol stream is focused by a sheath gas in the printing head. Thus the long standoff distance between substrate and deposition tip of max. 5 mm allows the 3D-printing on non-planar substrates. With optimized inks and printing parameters line widths of 10 μm are achievable. This paper will present applications for aerosol printed functional layers on LTCC. These are, for example, aerosol printed films embedded in co-fired LTCC, fine line structures for high frequency applications and the evaluation of printed 3D-structures like LTCC-stairways. Furthermore the 90 degree contacting of unconventional sensor designs will be presented.

Стилі APA, Harvard, Vancouver, ISO та ін.

41

Tuluhong, Ayiguzhali, Weiqing Wang, Yongdong Li, Haiyun Wang, and Lie Xu. "Research on Modelling and Stability Characteristics of Electric Traffic Energy System Based on ZVS-DAB Converter." Journal of Electrical and Computer Engineering 2020 (May 28, 2020): 1–10. http://dx.doi.org/10.1155/2020/5450628.

Повний текст джерела

Анотація:

We study and describe mostly used traditional simplified circuits for full-bridge Zero Voltage Switching-Dual Active Bridge (ZVS-DAB) converter and deduce their mathematical model. On this basis, we propose a high-frequency (HF) mathematical model, which takes into account conduction loss and HF characteristics of the ZVS-DAB converter model. We compare the static and dynamic stabilities of the traditional and the proposed HF mathematical model by simulation. Finally, the high-frequency planar transformer (HFPT) with good heat dissipation and the wide band gap (WBG) semiconductor SiC switches with fast switching speed are employed to build a 4.4 kw, 40 KHz experimental prototype to verify the effectiveness of the improved HF circuit of ZVS-DAB converter. The results show that the proposed HF mathematical model is superior to the traditional one, and it fully considers the HF characteristics of the circuit and effectively improves the HF oscillation, DC bias, and waveform distortion of the ZVS-DAB converter.

Стилі APA, Harvard, Vancouver, ISO та ін.

42

Yan, Q. Y., R. J. Gambino, and S. Sampath. "Low-temperature annealing effect on plasma sprayed mnzn ferrite for planar transformers of high-frequency applications." IEEE Transactions on Magnetics 39, no. 5 (September 2003): 3106–8. http://dx.doi.org/10.1109/tmag.2003.816020.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

43

Kaziz, Sinda, Pietro Romano, Antonino Imburgia, Guido Ala, Halim Sghaier, Denis Flandre, and Fares Tounsi. "PCB-Based Planar Inductive Loops for Partial Discharges Detection in Power Cables." Sensors 23, no. 1 (December 27, 2022): 290. http://dx.doi.org/10.3390/s23010290.

Повний текст джерела

Анотація:

Partial discharge (PD) diagnosis tests, including detecting, locating, and identifying, are used to trace defects or faults and assess the degree of aging in order to monitor the insulation condition of medium- and high-voltage power cables. In this context, an experimental evaluation of three different printed circuit board (PCB)-based inductive sensor topologies, with spiral, non-spiral, and meander shapes, is performed. The aim is to assess their capabilities for PD detection along a transmission power cable. First, simulation and experimental characterization are carried out to determine the equivalent electrical circuit and the quality factor of the three sensors. PD activity was studied in the lab on a 10-m-long defective MVAC cable. The three PCB-based sensors were tested in three different positions: directly on the defective cable (P1), at a separation distance of 10 cm to 3 m (P2), and on the ground line (P3). For the three positions, all sensors’ outputs present a damped sine wave signal with similar frequencies and durations. Experimental results showed that the best sensitivity was given by the non-spiral inductor, with a peak voltage of around 500 mV in P1, 428 mV in P2, and 45 mV in P3, while the meander sensor had the lowest values, which were approximately 80 mV in P1. The frequency spectrum bandwidth of all sensors was between 10 MHz and 45 MHz. The high sensitivity of the non-spiral inductor could be associated with its interesting properties in terms of quality factor and SFR, which are due to its very low resistivity. To benchmark the performance of the designed three-loop sensors, a comparison with a commercial high-frequency current transformer (HFCT) is also made.

Стилі APA, Harvard, Vancouver, ISO та ін.

44

Yeo, Junho, and Jong-Ig Lee. "High-Sensitivity Slot-Loaded Microstrip Patch Antenna for Sensing Microliter-Volume Liquid Chemicals with High Relative Permittivity and High Loss Tangent." Sensors 22, no. 24 (December 12, 2022): 9748. http://dx.doi.org/10.3390/s22249748.

Повний текст джерела

Анотація:

This paper proposes a microwave sensor based on a high-sensitivity slot-loaded rectangular microstrip patch antenna (MPA) for measuring microliter-volume liquid chemicals with high relative permittivity and high loss tangent. A rectangular single-ring complementary split ring resonator (SR-CSRR) slot with a bottom-edge center split (BCS) was inserted along the upper radiating edge of the patch to enhance the relative permittivity sensitivity of the MPA. The first resonant frequency of the proposed SR-CSRR-BCS slot-loaded MPA showed the highest sensitivity compared to the resonant frequencies of the MPAs with other commonly used slots for varying the relative permittivity of the planar substrate type material under test from 1 to 10 when placed above the patch. After designing the scaled SR-CSRR-BCS slot-loaded MPA with the unloaded first resonant frequency at 2.5 GHz, a hollow acrylic cylindrical liquid container with an inner volume of approximately 18.6 μL was placed at the top-edge center of the SR-CSRR-BCS slot to achieve maximum sensitivity. A quarter-wavelength transformer was applied between the patch and the feed line of the MPA to improve the impedance mismatch that occurs when liquid chemicals with a high loss tangent are placed in the container. Water, methanol, and ethanol were carefully selected for test liquids to cover a broad range of relative permittivity and high loss tangents. The proposed SR-CSRR-BCS slot-loaded MPA was designed and fabricated on a 0.76 mm-thick RF-35 substrate, and a reference RS-loaded MPA was designed and fabricated for comparison. The shift in the first resonant frequency of the input reflection coefficient characteristic was used for the sensitivity comparison, and the container was filled with 15 μL of the liquids at 25 °C. The measured sensitivity (%) of the proposed SR-CSRR-BCS slot-loaded MPA for water was 0.45%, which was higher than other antenna-based microwave sensors in the literature.

Стилі APA, Harvard, Vancouver, ISO та ін.

45

Alemanno, Alessio, Riccardo Morici, Miguel Pretelli, and Corrado Florian. "Design of a 7.5 kW Dual Active Bridge Converter in 650 V GaN Technology for Charging Applications." Electronics 12, no. 6 (March 7, 2023): 1280. http://dx.doi.org/10.3390/electronics12061280.

Повний текст джерела

Анотація:

High-voltage GaN switches offer low conduction and commutation losses compared with their Si counterparts, enabling the development of high-efficiency switching-mode DC–DC converters with increased switching frequency, faster dynamics, and more compact dimensions. Nonetheless, the potential of GaN switches can be fully exploited only by means of accurate simulations, optimal switch driving, suitable converter topology, accurate component selection, PCB layout optimization, and fast digital converter control. This paper describes the detailed design, simulation, and implementation of an air-cooled, 7.5 kW, dual active bridge converter exploiting commercial 650 V GaN switches, a compact planar transformer, and low ESL/ESR metal film capacitors. The isolated bidirectional converter operates at a 200 kHz switching frequency, with an output voltage range of 200–500 V at nominal 400 V input voltage, and a maximum output current of 28 A, with a wide full-power ZVS region. The overall efficiency at full power is 98.2%. This converter was developed in particular for battery charging applications, when bidirectional power flow is required.

Стилі APA, Harvard, Vancouver, ISO та ін.

46

Ho, Godwin Kwun Yuan, Yaoran Fang, and Bryan M. H. Pong. "A Multiphysics Design and Optimization Method for Air-Core Planar Transformers in High-Frequency LLC Resonant Converters." IEEE Transactions on Industrial Electronics 67, no. 2 (February 2020): 1605–14. http://dx.doi.org/10.1109/tie.2019.2910023.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

47

Slimani, Abdellatif, Saad Dosse Bennani, Ali El Alami, and Mohamed Amellal. "Gain and bandwidth enhancement of New Planar microstrip array antennas geometry for C band weather radar applications." International Journal of Microwave and Wireless Technologies 9, no. 5 (November 9, 2016): 1139–46. http://dx.doi.org/10.1017/s1759078716001203.

Повний текст джерела

Анотація:

A 4–8 GHz ultra wide band microstrip array antennas with improved gain for weather Radar applications was designed and fabricated. The microstrip radiating elements of the proposed array antennas are powered using a T-junction power divider with quarter wave-transformer impedance for a best matching. The design of this array antennas is based on the geometry of a linear array antennas well studied [ref (8)], which is based on minimizing of the electromagnetic (EM) coupling between the radiating elements and as decreasing the number of side lobes. The array antennas with dimension of (110 × 214 × 1.58 mm3) is fabricated on FR-4 epoxy dielectric with relative permittivity of 4.4 and thicknessh= 1.58 mm, it is performed in the full-wave EM solver High Frequency Structure Simulator, CST and verified by measurement. The proposed broadband array antennas show a better performance than the references antennas in deferent parameter which cited after.

Стилі APA, Harvard, Vancouver, ISO та ін.

48

Wotzka, Daria, Wojciech Sikorski, and Cyprian Szymczak. "Investigating the Capability of PD-Type Recognition Based on UHF Signals Recorded with Different Antennas Using Supervised Machine Learning." Energies 15, no. 9 (April 26, 2022): 3167. http://dx.doi.org/10.3390/en15093167.

Повний текст джерела

Анотація:

The article presents research on the influence of the type of UHF antenna and the type of machine learning algorithm on the effectiveness of classification of partial discharges (PD) occurring in the insulation system of a power transformer. For this purpose, four antennas specially adapted to be installed in the transformer tank (UHF disk sensor, UHF drain valve sensor, planar inverted F-type antenna, Hilbert curve fractal antenna) and a reference log-periodic antenna were used in laboratory tests. During the research, the main types of PD, typical for oil-paper insulation, were generated, i.e., PD in oil, PD in oil wedge, PD in gas bubbles, surface discharges, and creeping sparks. For the registered UHF PD pulses, nine features in the frequency domain and four features in the wavelet domain were extracted. Then, the PD classification process was carried out with the use of selected methods of supervised machine learning. The study investigated the influence of the number and type of feature on the obtained classification results gained with the following machine-learning methods: decision tree, support vector machine, Bayes method, k-nearest neighbor, linear discriminant, and ensemble machine. As a result of the works carried out, it was found that the highest accuracies are gathered for the feature representing peak frequency using a decision tree, reaching values, depending on the type of antenna, from 89.7% to 100%, with an average of 96.8%. In addition, it was found that the MRMR method reduces the number of features from 13 to 1 while maintaining very high effectiveness. The broadband log-periodic antenna ensured the highest average efficiency (100%) in the PD classification. In the case of the tested antennas adapted to work in an energy transformer tank, the highest defect-recognition efficiency is provided by the UHF disk sensor (99.3%), and the lowest (89.7%) is by the UHF drain valve sensor.

Стилі APA, Harvard, Vancouver, ISO та ін.

49

Wotzka, Daria, Wojciech Sikorski, and Cyprian Szymczak. "Investigating the Capability of PD-Type Recognition Based on UHF Signals Recorded with Different Antennas Using Supervised Machine Learning." Energies 15, no. 9 (April 26, 2022): 3167. http://dx.doi.org/10.3390/en15093167.

Повний текст джерела

Анотація:

The article presents research on the influence of the type of UHF antenna and the type of machine learning algorithm on the effectiveness of classification of partial discharges (PD) occurring in the insulation system of a power transformer. For this purpose, four antennas specially adapted to be installed in the transformer tank (UHF disk sensor, UHF drain valve sensor, planar inverted F-type antenna, Hilbert curve fractal antenna) and a reference log-periodic antenna were used in laboratory tests. During the research, the main types of PD, typical for oil-paper insulation, were generated, i.e., PD in oil, PD in oil wedge, PD in gas bubbles, surface discharges, and creeping sparks. For the registered UHF PD pulses, nine features in the frequency domain and four features in the wavelet domain were extracted. Then, the PD classification process was carried out with the use of selected methods of supervised machine learning. The study investigated the influence of the number and type of feature on the obtained classification results gained with the following machine-learning methods: decision tree, support vector machine, Bayes method, k-nearest neighbor, linear discriminant, and ensemble machine. As a result of the works carried out, it was found that the highest accuracies are gathered for the feature representing peak frequency using a decision tree, reaching values, depending on the type of antenna, from 89.7% to 100%, with an average of 96.8%. In addition, it was found that the MRMR method reduces the number of features from 13 to 1 while maintaining very high effectiveness. The broadband log-periodic antenna ensured the highest average efficiency (100%) in the PD classification. In the case of the tested antennas adapted to work in an energy transformer tank, the highest defect-recognition efficiency is provided by the UHF disk sensor (99.3%), and the lowest (89.7%) is by the UHF drain valve sensor.

Стилі APA, Harvard, Vancouver, ISO та ін.

50

Alemanno, Alessio, Fabio Ronchi, Carlo Rossi, Jacopo Pagliuca, Matteo Fioravanti, and Corrado Florian. "Design of a 350 kW DC/DC Converter in 1200-V SiC Module Technology for Automotive Component Testing." Energies 16, no. 5 (February 28, 2023): 2341. http://dx.doi.org/10.3390/en16052341.

Повний текст джерела

Анотація:

In this paper, the design and implementation of a DC/DC converter for automotive component testing with state-of-the art performance is described. The converter is the core of a battery emulator for the characterization and development of automotive batteries, electronic chargers, traction inverters, DC-DC converters, E-motors and E-axles. Cutting edge performance, flexibility and compactness are obtained by exploiting 1200-V SiC modules, high switching frequency, planar transformer technology, suitable topology solutions and fast digital control strategies. The implemented system is a liquid-cooled, bidirectional converter with galvanic isolation capable of 350 kW continuous output power, output voltage range 48–1000 V, continuous output current up to 800 A (1600 A peak), voltage/current ramp-up time below 10/2 ms and 0.1% current/voltage accuracy. The entire instrument is implemented in a standard full-height 19-inch rack cabinet.

Стилі APA, Harvard, Vancouver, ISO та ін.

Статті в журналах з теми "High Frequency Planar Transformer"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями