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Journal articles on the topic 'High Frequency Converter'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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1

Zhang Zhengquan, 张政权, 刘庆想 Liu Qingxiang, 向欣 Xiang Xin, 张朋朋 Zhang Pengpeng, and 吴志鹏 Wu Zhipeng. "High-frequency rectifying commutated converter." High Power Laser and Particle Beams 22, no. 4 (2010): 721–24. http://dx.doi.org/10.3788/hplpb20102204.0721.

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2

Mortazavizadeh, Seyed Abolfazl, Simone Palazzo, Arturo Amendola, Enzo De Santis, Dario Di Ruzza, Giuseppe Panariello, Annunziata Sanseverino, Francesco Velardi, and Giovanni Busatto. "High Frequency, High Efficiency, and High Power Density GaN-Based LLC Resonant Converter: State-of-the-Art and Perspectives." Applied Sciences 11, no. 23 (November 30, 2021): 11350. http://dx.doi.org/10.3390/app112311350.

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Soft switching for both primary and secondary side devices is available by using LLC converters. This resonant converter is an ideal candidate for today’s high frequency, high efficiency, and high power density applications like adapters, Uninterrupted Power Supplies (UPS), Solid State Transformers (SST), electric vehicle battery chargers, renewable energy systems, servers, and telecom systems. Using Gallium-Nitride (GaN)-based power switches in this converter merits more and more switching frequency, power density, and efficiency. Therefore, the present paper focused on GaN-based LLC resonant converters. The converter structure, operation regions, design steps, and drive system are described precisely. Then its losses are discussed, and the magnets and inductance characteristics are investigated. After that, various interleaved topologies, as a solution to improve power density and decrease current ripples, have been discussed. Also, some challenges and concerns related to GaN-based LLC converters have been reviewed. Commercially available power transistors based on various technologies, i.e., GaN HEMT, Silicon (Si) MOSFET, and Silicon Carbide (SiC) have been compared. Finally, the LLC resonant converter has been simulated by taking advantage of LTspice and GaN HEMT merits, as compared with Si MOSFETs.

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3

Jiang, Ting, Jian Feng Jiang, and Xi Jun Yang. "Research on Multi-Stage Series-Connection High-Voltage High-Power Matrix Converter." Advanced Materials Research 347-353 (October 2011): 843–47. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.843.

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Charge storage is an important research topic in smart grid and distributed generation system, pumped storage as one of the most popular large-scale charge storage methods has attracted increasing attention. However, the motor generator of the pumped charge station has high input voltage and heavy load, so in order to get grid connected safely, being soft started by a high voltage converter is necessary. In the view of the existing high voltage high power converters, only the voltage source inverter Multi-stage Series-connection high voltage frequency converters are suitable for this application, and this paper gives analysis of such converters. Based on Carrier Wave Phase-Shifted modulation, this paper proposes a multi-stage Series-connection high voltage frequency converter with balanced output power of the step-down transformer’s secondary windings, in which a winding burdens three symmetry three-phase to single-phase MC outputs, and the same phase outputs of the MC are cascaded at the secondary side of the transformers, letting out one phase of high-voltage AC output. The circuit is consisted of a step-down industry frequency transformer at the network side, three-phase to single-phase MC arrays, a step-up high frequency transformer at the load side and filter components. The simulation result based on MATLAB/SIMULINK shows that the proposed multi-stage Series-connection high voltage frequency converter is feasible and low-cost.

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4

Batarseh, I., and C. Q. Lee. "High-frequency high-order parallel resonant converter." IEEE Transactions on Industrial Electronics 36, no. 4 (1989): 485–98. http://dx.doi.org/10.1109/41.43007.

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5

Lu, Yujia, Longpeng Sui, Leiming Dong, Chaoqun Jiao, Zhibin Zhao, Xiumin Zhang, and Xiaoqian Jia. "Research on Electromagnetic Disturbance Characteristics of Mining Frequency Converter Based on Frequency Domain Analysis." Journal of Physics: Conference Series 2401, no. 1 (December 1, 2022): 012031. http://dx.doi.org/10.1088/1742-6596/2401/1/012031.

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Abstract With the continuous improvement of the technical level of coal mine equipment, low-voltage converters have been used in many types of underground electromechanical equipment because of their energy-saving and high-efficiency features. However, low-voltage mining converters generate a lot of electromagnetic disturbances during operation, which may cause the surrounding electrical equipment to work abnormally. Therefore, it is important to study the electromagnetic disturbance characteristics in the frequency domain of the mining converter. This paper takes a typical ZJT series mining low-voltage AC converter as the research object, models and simulates the whole mining converter and its main interference source IGBT, and analyses and compares the measured electromagnetic harassment data to obtain the electromagnetic harassment trend characteristics of IGBT in the converter, which is of certain guiding significance for the development of immunity test standards of the equipment or system around the mining converter.

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6

Babu, A. R. Vijay, P. M. Venkatesh, and Dr K. Suresh. "High Frequency Link Power Conversion System for Fuel cell Applications." International Journal of Engineering & Technology 7, no. 4.24 (November 27, 2018): 1. http://dx.doi.org/10.14419/ijet.v7i4.24.21760.

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In this paper an empirical model of the air breathing (ABFC) is proposed to investigate the cell voltage verses current density characteristics and harnessing of maximum energy from natural resource whenever it’s available. The power electronic converters role is important in between source and load. Proper controller can switch the converter in the desired time and improve the system performance and stability. The mathematical model of the ABFC is built in MATLAB/Simulink. The proposed system also has boost converter, bidirectional DC-DC converter and inverter for grid and energy integration. The boost inverter/buck rectifier in this system is controlled by ANFIS controller is for better output, boost and bidirectional DC-DC converters are controlled by PID controller in closed loop. Overall operations are based on modes main controller, which control the system operation in different modes. Any variations happening in the input, storage and load parameters, the controller changes the mode and operates the system in effective way.

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7

LAOPOULOS, TH L., and C. A. KARYBAKAS. "High performance frequency-to-voltage converter." International Journal of Electronics 68, no. 2 (February 1990): 303–7. http://dx.doi.org/10.1080/00207219008921172.

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8

Shin, Han Ho, and Seong-Jeub Jeon. "High Frequency Two-phase Resonant Converter." Transactions of The Korean Institute of Electrical Engineers 68, no. 12 (December 31, 2019): 1574–79. http://dx.doi.org/10.5370/kiee.2019.68.12.1574.

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9

Lee, F. C. "High-frequency quasi-resonant converter technologies." Proceedings of the IEEE 76, no. 4 (April 1988): 377–90. http://dx.doi.org/10.1109/5.4424.

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10

Itoh, Jun-ichi, Takashi Iida, and Daisuke Matsumura. "High Efficiency High-Frequency Link Converter with AC/AC Direct Converter Technology." IEEJ Transactions on Industry Applications 127, no. 8 (2007): 822–28. http://dx.doi.org/10.1541/ieejias.127.822.

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11

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.

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<p>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.<strong><em></em></strong></p>

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12

Swamy, Gangadhara, and Molugu Shruthi. "Power Loss Evaluation Method for Modular Multi-Level Converter with High-Frequency." International Journal of Trend in Scientific Research and Development Volume-2, Issue-1 (December 31, 2017): 508–11. http://dx.doi.org/10.31142/ijtsrd7027.

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13

Padmavathi, Pydikalva, and Sudhakar Natarajan. "A Novel High Gain Voltage-Lift Technique Based Transformer free Non-isolated Quadratic Boost Converter." MATEC Web of Conferences 225 (2018): 04010. http://dx.doi.org/10.1051/matecconf/201822504010.

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A novel high gain voltage lift technique based transformer free non isolated boost converter is proposed with single switch operating at constant frequency in this paper. This performance of this converter is very good and high efficient compared to the conventional boost converters. The high gain is obtained by applying voltage lift cell to the quadratic boost converter. The simple structure, easy controlling and lower voltage stress. The operating principle with theoretical analysis and simulation results of proposed converter for various loads at 10 kHz frequency are discussed in this paper to compare the performance of this novel boost converter.

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14

Islam, Md Maidul, and Md Mamun Ur Rashi. "Development of a New High Frequency Two Quadrant DC-DC Sepic Converter." Asia Pacific Journal of Energy and Environment 5, no. 1 (June 30, 2018): 31–40. http://dx.doi.org/10.18034/apjee.v5i1.248.

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The DC-DC converter find a wide scope in industries, telecommunication sectors, power electronics area, etc. Nowadays bi-directional converters have a higher end over them since the energy from the load during regenerative braking is fed back to the source, thus obtaining energy efficient system. A single topology that can provide Buck-Boost operation with positive output having four quadrant operations is not available in the literature. A common limitation of power coupling effect in some known multiple-input dc-dcconverters has been addressed in many kinds of literatures. In this paper, a new single topology of two quadrants DC-DC Sepic converter has been developed to provide four quadrant operation of a high- frequency dc-dc converter having one supply source and proper control of the converter. The combined topology has been analyzed and studied by spice simulation.

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15

Nguyen, Thi Minh, Huu Lam Phan, Dinh Lam Vu, Thi Quynh Hoa Nguyen, and Jung-Mu Kim. "Ultra-wideband and high-efficiency cross-polarization conversion using a double split ring shaped metasurface for C, X, and Ku-band applications." AIP Advances 12, no. 11 (November 1, 2022): 115002. http://dx.doi.org/10.1063/5.0125802.

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Polarization converters play an important role in practical applications to manipulate the electromagnetic wave. However, the development of a polarization converter that possesses both high conversion efficiency and a wide frequency band is very challenging due to the trade-off between them. Here, we present an ultra-wideband and high-efficiency cross-polarization converter based on a double split ring shaped metasurface. The performance of the proposed converter is simulated and verified by experiments, showing a good agreement. The proposed polarization converter shows the cross-polarization conversion with a conversion efficiency above 93% in a wide frequency range from 4.0 to 14.0 GHz covering the entire C- and X-bands and a part of the Ku-band due to the combination of multi-modes of magnetic and electric resonances. Compared with other ultra-wideband polarization converters, the proposed converter shows excellent characteristics in terms of high efficiency, wide frequency band, and lightweight design, demonstrating a great potential application in C-, X-, and Ku-bands.

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16

Ahi, Kiarash. "Modeling and Control of a Multiphase Modular High-Frequency Converter/Inverter for Vehicle Applications." International Journal of High Speed Electronics and Systems 27, no. 03n04 (September 2018): 1840014. http://dx.doi.org/10.1142/s0129156418400141.

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This paper presents a novel control algorithm for a modular high-frequency converter. This control algorithm is designed to achieve an effective frequency higher than the switching frequency on the passive elements. As a result, the ripple on the output is suppressed, and smaller capacitors can be used. In this work, the modular high-frequency converter is modeled by equivalent boost converters. Based on the equivalent models a control algorithm is developed. The accuracy of the algorithm has been verified by simulation results using PLECS in the MATLAB/Simulink environment.

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17

Yang, Tongbin, Xiaotong Guan, Wenjie Fu, Dun Lu, Xuesong Yuan, and Yang Yan. "Investigation on 220 GHz Taper Cascaded Over-Mode Circular Waveguide TE0n Mode Converter." Electronics 10, no. 2 (January 6, 2021): 103. http://dx.doi.org/10.3390/electronics10020103.

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This paper proposes a taper cascaded over-mode circular waveguide TE0n mode converter for the millimeter and terahertz wave gyrotron. The mode converter of this structure can effectively reduce the difficulty of high frequency mode converter in fabrication. This paper verifies the feasibility of this new structure from theory, simulation, and experiment. Based on coupled wave theory calculations, three TE02-TE01 mode converters with lengths of 65.43 mm (4 segments), 119.3 mm (6 segments) and 136 mm (8 segments) and a TE03-TE02 mode converter with a length of 92 mm (8 segments) are optimized. The conversion efficiency in the frequency band 215–225 GHz is 91.8–94%, 93–95%, 95–98.78% and 95–98.44%. Because the length of the mode converter is clearly limited, this paper selects the TE02-TE01 mode converter with a length of 65.43 mm (4 segments) and the TE03-TE02 mode converter with 92 mm (8 segments) for simulation and experimental verification. In the simulation software Computer simulation technology (CST), the TE02-TE01 and TE03-TE02 mode converters and their composed TE03-TE01 mode converters are selected for modeling and analyzing. The simulation results and theoretical calculation results of the three mode converters only have different degrees of frequency deviation, and the frequency deviation of the 4-stage TE02-TE01 mode converter can be ignored; the frequency deviations of TE03-TE02 mode converter and TE03-TE01 mode converter are 2 GHz and 3 GHz, respectively. The experimental system is a field scanning system based on a vector network analyzer (VNA), which scans the input and output of the mode converter respectively. The experimental result is that when the input mode purity is 92% in TE01 mode, the output mode TE03 mode has a mode purity of 82%, and it has lower transmission loss. In this paper, the results from theory, simulation and experiment are in good agreement. This type of mode converter is easy to prepare, which makes it an effective alternative for high frequency curvilinear waveguide mode converter.

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18

Htun, Mary, Soe Winn, and Win Moet Moet Htwe. "Design and Simulation of 80 kHz High Frequency Converter Using CD 4047IC CMOS." International Journal of Trend in Scientific Research and Development Volume-2, Issue-6 (October 31, 2018): 660–65. http://dx.doi.org/10.31142/ijtsrd18592.

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19

Khan, Danish, Pengfei Hu, Muhammad Waseem, Muhammad Yasir Ali Khan, Mustafa Tahir, and Andres Annuk. "Practical Evaluation of Loss Reduction in Isolated Series Resonant Converter with Fixed Frequency Modulation." Energies 15, no. 16 (August 10, 2022): 5802. http://dx.doi.org/10.3390/en15165802.

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Nowadays, power converters with reduced cost, compact size and high efficiency are evolving to overcome the emergent challenges of renewable energy integrations. In this context, there is an increased demand for well-designed power converters in renewable energy applications to reduce energy utilization and handle a variety of loads. This paper proposes a center-tapped bridge cascaded series-resonant LC dual active bridge (DAB) converter for DC-DC conversion. The low part count of the proposed converter enables a high-power density design with reduced cost. The proposed converter offers reduced conduction losses as the reverse current is eliminated by adopting current blocking characteristics. Reverse current blocking also enables zero voltage switching (ZVS) and zero current switching (ZCS) over a wide operating range. Therefore, using a simple fixed frequency modulation (FFM) scheme offers a wide operating range compared to a conventional DAB converter. A thorough comparison of the proposed converter and a conventional DAB converter is provided based on conduction losses and switching losses to illustrate the performance improvement. Lastly, the effectiveness of the proposed converter is validated through simulation and experimental results.

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20

Hayashi, Yusuke, Yoshikatsu Matsugaki, and Tamotsu Ninomiya. "Design Consideration for High Step-Up Nonisolated Multicellular dc-dc Converter for PV Micro Converters." Journal of Engineering 2018 (2018): 1–16. http://dx.doi.org/10.1155/2018/5098083.

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High step-up nonisolated multicellular dc-dc converter has been newly proposed for PV microconverters. The multicellular converter consists of the nonisolated step-up cell converters using bidirectional semiconductor switches, and these cell converters are connected in Input Parallel Output Series (IPOS). The voltage transformation ratio of the step-up converter is N/(1-D) in case all the transistors in N cell converters are operated at the duty ratio of D. The proposed multicellular dc-dc converter also accomplishes high efficiency because of no magnetic coupling such as the high frequency transformer and the coupled inductor. Laboratory prototype has been fabricated to show the feasibility of the proposed converter. Design consideration for the 20 V–40 V to 384 V, 240 W nonisolated multicellular dc-dc converter has been also conducted, and the potential to achieve the efficiency of 98% has been shown. The proposed multicellular converter contributes to realizing the environmentally aware data centers for future low carbon society.

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21

Yousefpoor, Nima, Babak Parkhideh, Ali Azidehak, Sungmin Kim, and Subhashish Bhattacharya. "Control of High-Frequency Isolated Modular Converter." IEEE Transactions on Industry Applications 51, no. 6 (November 2015): 4634–41. http://dx.doi.org/10.1109/tia.2015.2457402.

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22

Krummenacher, F. "A High-Resolution Capacitance-to-Frequency Converter." IEEE Journal of Solid-State Circuits 20, no. 3 (June 1985): 666–70. http://dx.doi.org/10.1109/jssc.1985.1052366.

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23

Filatov, A. V., S. P. Novitskii, A. A. Vais, and L. V. Fadeeva. "High-frequency measuring impedance-to-voltage converter." Measurement Techniques 39, no. 8 (August 1996): 866–71. http://dx.doi.org/10.1007/bf02370204.

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24

Biliński, Janusz. "The latest generation drive for electric buses powered by SiC technology for high energy efficiency." MATEC Web of Conferences 180 (2018): 02012. http://dx.doi.org/10.1051/matecconf/201818002012.

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High energy efficiency and increasing the working frequency of the converter will make it possible to minimize the size of the cooling system and reduce energy consumption. The use of the SiC technology in propulsion drives increases the efficiency of the converter by 1÷1.5%. Simultaneously, higher working frequency reduces losses in the traction motor, significantly lowering the cost of the energy consumed by the vehicle. Auxiliary converters using the SiC technology are a new quality. The reduction of weight and size is very significant (ca. 40÷50%). Higher switching frequency reduces the size of magnetic components (ca. 80%), and higher converter efficiency minimizes the size of the cooling system. The overall efficiency of the converter is extremely high (94÷96%). This paper presents comparison of Si and SiC parameters which are important for modern EV solutions. Paper presents also parameters of SiC traction inverter and auxiliary converter, designed and manufactured as state-of-the-art product for modern electric bus.

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25

Van Tung, Le, Dang Ngoc Huy, Do Chi Thanh, and Bui Trung Kien. "IMPROVING THE POWER FACTOR AND REDUCING THE HARMONICS OF THE POWER SUPPLY CURRENT IN THE ELECTRIC DRIVE SYSTEM OF CONVEYORS." Electrical and data processing facilities and systems 18, no. 2 (2022): 63–72. http://dx.doi.org/10.17122/1999-5458-2022-18-2-63-72.

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Relevance Currently, frequency converters with diode rectifiers are very often used in conveyor drive systems. However, frequency converters generate current harmonics, adversely affecting the quality of the network and the durability of electrical equipment. In the electric drive system, the induction motor consumes the reactive power of the source, which causes losses in the network and reduces the power factor at the input of the converter. Therefore, for the electric drive system, it is necessary to analyze methods for improving the power factor and reducing harmonic distortion of the current in the network. The reactor frequency converter has a simple structure but does not have high efficiency. A frequency converter with a multi-pulse rectifier will use multiple rectifier circuits in combination with a transformer to eliminate high order harmonics. The reactor frequency converter has a simple structure but does not have high efficiency. A frequency converter with a multi-pulse rectifier will use multiple rectifier circuits in combination with a transformer to eliminate high order harmonics. The active filter method will produce current waves of the same amplitude but opposite phase angle to the harmonics generated by the load, which eliminates most high-order harmonics and can compensate for reactive power. Aim of research Improving the energy efficiency of the conveyor electric drive with minimizing its impact on the quality of the electric power of the quarry network through the use of active rectifiers with a direct power control system in multi-inverter frequency converters. Research methods In this study, the following methods were used: the study of scientific literature, computer simulation performed in the MatLab software package. Results The frequency converters use active rectifiers with direct control of active and reactive power, the power factor is close to unity, and the energy exchange occurs in two directions between the motor and the network. The article compares the effectiveness of methods when considering a system of the frequency-controlled electric drive of conveyors.

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26

Cheng, Hung Liang, Chun An Cheng, Chao Shun Chen, and Kuan Lung Huang. "Design and Implementation of a Dimmable LED Driver with Low-Frequency PWM Control." Applied Mechanics and Materials 284-287 (January 2013): 2538–42. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2538.

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This paper proposes a high-efficiency dimmable LED driver for light emitting diodes (LED). The developed LED driver consists of a full-bridge resonant converter and six buck converters. The function of the full-bridge resonant converter is to obtain a smooth dc-link voltage for the buck converters by phase-shift modulation (PSM) while that of the six buck converters is to drive six LED modules, respectively. The gate voltage of the active switch of each buck converter is a combination of high-frequency and low-frequency pulses. The duty ratio of the high-frequency pulse controls the LED voltage and thereby, controls the amplitude of LED current. LEDs are dimmed by low-frequency pulse-width modulation (PWM) to vary the average current flowing through LED. Circuit equations are derived and circuit parameters are designed. High circuit efficiency is ensured by operating the active switches at zero-voltage switching-on to reduce the switching loss. Finally, a prototype circuit was built to verify the accuracy and feasibility of the proposed LED driver.

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27

Zhu, Tianyu, Jianze Wang, Yanchao Ji, and Yiqi Liu. "A Novel High Efficiency Quasi-Resonant Converter." Energies 11, no. 8 (July 27, 2018): 1961. http://dx.doi.org/10.3390/en11081961.

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In this paper, a new constant-frequency quasi-resonant converter is proposed. Compared with the traditional LLC converter, the proposed converter can effectively reduce the range of the operating frequency. The output voltage is changed to adjust the reactance of the resonant cavity. The proposed converter has a better loss factor. To verify the theoretical analysis and soft-switching condition, a 250 W, 100 V output prototype was built and compared with the full-bridge LLC converter. Analysis and experimental results verify that a smaller operating frequency range and volume of the transformers, a soft-switching condition, and a higher overall efficiency are achieved with the proposed converter.

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28

Sun, Bao Wen, and Yun Xi Wu. "Single-Stage Power Factor Correction (PFC) Converter Design." Applied Mechanics and Materials 687-691 (November 2014): 3383–86. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.3383.

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A single-stage PFC converter was introduced in this paper, then the converter EMI filters, converters inductors, high-frequency transformers and power components were designed and chosen, proven to good effect.

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29

Geddam, Kiran Kumar, and Elangovan Devaraj. "Real Time Hardware-in-Loop Implementation of LLC Resonant Converter at Worst Operating Point Based on Time Domain Analysis." Energies 15, no. 10 (May 16, 2022): 3634. http://dx.doi.org/10.3390/en15103634.

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The inductor inductor capacitor (LLC) resonant topology has become more popular for deployment in high power density and high-efficiency power converter applications due to its ability to maintain zero voltage switching (ZVS) over a wider input voltage range. Due to their ease of operation and acceptable accuracy, frequency domain-related analytical methods using fundamental harmonic approximation (FHA) have been frequently utilized for resonant converters. However, when the switching frequency is far from the resonant frequency, the circuit currents contain a large number of harmonics, which cannot be ignored. Therefore, the FHA is incapable of guiding the design when the LLC converter is used to operate in a wide input voltage range applications due to its inaccuracy. As a result, a precise LLC converter model is needed. Time domain analysis is a precise analytical approach for obtaining converter attributes, which supports in the optimal sizing of LLC converters. This work strives to give a precise and an approximation-free time domain analysis for the exact modeling of high-frequency resonant converters. A complete mathematical analysis for an LLC resonant converter operating in discontinuous conduction mode (DCM)—i.e., the boost mode of operation below resonance—is presented in this paper. The proposed technique can confirm that the converter operates in PO mode throughout its working range; in addition, for primary MOSFET switches, it guarantees the ZVS and zero current switching (ZCS) for the secondary rectifier. As a function of frequency, load, and other circuit parameters, closed-form solutions are developed for the converter’s tank root mean square (RMS) current, peak stress, tank capacitor voltage, voltage gain, and zero voltage switching angle. Finally, an 8 KW LLC resonant converter is built in the hardware-in-loop (HIL) testing method on RT-LAB OP-5700 to endorse the theoretical study.

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30

Almalaq, Y., and M. Matin. "Two-Switch High Gain Non-Isolated Cuk Converter." Engineering, Technology & Applied Science Research 10, no. 5 (October 26, 2020): 6362–67. http://dx.doi.org/10.48084/etasr.3826.

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This paper introduces a two-switch high gain non-isolated Cuk converter which can be used as a high gain DC-DC converter in renewable energy, such as photovoltaic and fuel cell, applications because their output is low. As the conventional, the proposed Cuk converter provides negative output voltage but with a higher voltage in magnitude. The main advantage of the proposed converter is having lower voltage stress with the ability to maintain a higher voltage gain. By combining a switched-inductor and a switched-capacitor into the conventional Cuk converter, the proposed Cuk converter has the ability to reach 13 times the input voltage for a duty cycle D of 0.75. Also, by attaching more switched-inductors to the proposed Cuk converter, more voltage gain can be achieved. A complete theoretical analysis of the Continuous Conduction Mode (CCM) of the proposed Cuk converter is presented and the key aspects of the circuit design have been derived. Also, a comparison in terms of voltage gain and voltage stress between the proposed Cuk converter and Cuk converters using other techniques is presented. The proposed Cuk converter has been designed for 100W rated power, -152V output voltage, 50kHz switching frequency, and 75% duty cycle. The presented converter is simulated in Matlab/Simulink and the results are discussed.

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31

Idham alzaidi, Ali, Azli Yahya, Tan Tian Swee, and Norhalimah Idris. "Development of high frequency generator for bipolar electrosurgical unit." International Journal of Engineering & Technology 7, no. 2.29 (May 22, 2018): 20. http://dx.doi.org/10.14419/ijet.v7i2.29.13118.

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Power Electronics is widely used in bioscience and medical instruments such as Electrosurgical Units, MRI and X-ray. An advance development in switch mode power supply leads to a new design topology of DC to DC convertor for Electrosurgical Systems. The new designed system has a capacity to produce high efficient output power with high resonance, this improves the performance of the surgery operation. This paper reports a Buck-Boost topology DC to DC (Flyback) converter with high power switching. The simulation results show an improved performance when compared to the existing system.

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32

Biswas, Shuvra Prokash, Md Shihab Uddin, Md Rabiul Islam, Sudipto Mondal, and Joysree Nath. "A Direct Single-Phase to Three-Phase AC/AC Power Converter." Electronics 11, no. 24 (December 16, 2022): 4213. http://dx.doi.org/10.3390/electronics11244213.

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The traditional DC-link indirect AC/AC power converters (AC/DC/AC converters) employ two-stage power conversion, which increases the circuit complexity along with gate driving challenges, placing an excessive burden on the processor while implementing complex switching modulation techniques and leads to power conversion losses due to the use of a large amount of controlled power semiconductor switches. On the contrary, the traditional direct AC/AC voltage controllers, as well as frequency changers, suffer from high total harmonic distortion (THD) problems. In this paper, a new single-phase to three-phase AC/AC step-down power converter is proposed, which utilizes a multi-linking transformer and bilateral triode thyristors (TRIACs) as power semiconductor switches. The proposed direct AC/AC power converter employs single-stage power conversion, which mitigates the complexity of two-stage DC-link indirect AC/AC converters and traditional single-stage AC/AC frequency changers. Instead of using high-frequency pulse width modulated gate driving signals, line frequency gate pulses are used to trigger the TRIACs of the proposed AC/AC converter, which not only aids in reducing the power loss of the converter but also mitigates the cost and complexity of gate driver circuits. The proposed AC/AC converter reduces the THD of the output voltage significantly as compared to traditional direct AC/AC frequency changers. The performance of the proposed AC/AC converter is validated against RL and induction motor load in terms of overall THD and individual harmonic components through MATLAB/Simulink environment. A reduced-scale laboratory prototype is built and tested to evaluate the performance of the proposed AC/AC power converter. The experimental and simulation outcomes reveal the feasibility and excellent features of the proposed single-phase to three-phase AC/AC converter topology.

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Wang, Longxiang, Wenguang Luo, and Dan Huang. "Research on Automotive Bidirectional CLLC Resonant Converters Based on High-Order Sliding Mode Control." Electronics 11, no. 18 (September 11, 2022): 2874. http://dx.doi.org/10.3390/electronics11182874.

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A CLLC resonant converter’s gain is easily influenced by the operating frequency, and when the operating frequency is adjusted over a wide range, the efficiency of the converter is greatly reduced. Traditional closed-loop control strategies also have disadvantages such as slow dynamic response and vulnerability to load. In this paper, a high-order sliding mode control (SMC) design method is proposed based on the current problems and the characteristics of automotive CLLC resonant converters. A sliding mode surface based on the output voltage characteristics of the CLLC converter includes higher-order differential terms for voltage and current and an error integral term for the output voltage, which reduces the operating frequency range of the converter and improves its dynamic responsiveness, thus increasing its efficiency. In order to verify the accuracy of the algorithm, a simulation model is built in MATLAB to verify the stability of the controller by varying the input voltage and the magnitude of the load and to verify the dynamics by abruptly varying parameters such as load and voltage. Comparing high-order SMC with PID control also shows that high-order SMC is more suitable for automotive converters.

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Gontijo, Gustavo, Songda Wang, Tamas Kerekes, and Remus Teodorescu. "Performance Analysis of Modular Multilevel Converter and Modular Multilevel Series Converter under Variable-Frequency Operation Regarding Submodule-Capacitor Voltage Ripple." Energies 14, no. 3 (February 2, 2021): 776. http://dx.doi.org/10.3390/en14030776.

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The modular multilevel converter is capable to reach high-voltage levels with high flexibility, high reliability, and high power quality as it became the standard solution for high-power high-voltage applications that operate with fixed frequency. However, in machine-drive applications, the modular multilevel converter shows critical problems since an extremely high submodule-capacitor voltage ripple occurs in the machine start-up and at low-speed operation, which can damage the converter. Recently, a new converter solution named modular multilevel series converter was proposed as a promising alternative for high-power machine-drive applications since it presented many important structural and operational advantages in relation to the modular multilevel converter such as the reduced number of submodule capacitors and the low submodule-capacitor voltage ripple at low frequencies. Even though the modular multilevel series converter presented a reduced number of capacitors, the size of these capacitors was not analyzed. This paper presents a detailed comparison analysis of the performance of the modular multilevel converter and the modular multilevel series converter at variable-frequency operation, which is based on the proposed analytical description of the submodule-capacitor voltage ripple in such topologies. This analysis concludes that the new modular multilevel series converter can be designed with smaller capacitors in comparison to the modular multilevel converter if these converters are used to drive electrical machines that operate within a range of low-frequency values. In other words, the modular multilevel series converter experiences extremely low submodule-capacitor voltage ripple at very low frequencies, which means that this converter solution presents high performance in the electrical machine start-up and at low-speed operation.

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Lu, Wen Tao, and Yu Qing Li. "Research and Application of BPJV-1200/6K High Voltage Frequency Converter in Belt Conveyor." Applied Mechanics and Materials 494-495 (February 2014): 1548–51. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1548.

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In this paper, the BPJA-1200/6K mine-used high-voltage frequency converter designed and developed with Power Flex7000 is introduced. How to replace the fluid coupling used in original belt conveyor system with the converter to achieve the purpose of speed regulation by frequency variation as well as long distance driving are discussed. At the same time, the composition of the centralized control system for the belt conveyor is discussed and the speed regulation strategy and the main control functions are introduced. The converser system has been applied to a mine belt conveyor and the running results are better.

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Haugen, K. L., K. Papastergiou, P. Asimakopoulos, and D. Peftitsis. "High precision scalable power converter for accelerator magnets." Journal of Instrumentation 17, no. 03 (March 1, 2022): C03021. http://dx.doi.org/10.1088/1748-0221/17/03/c03021.

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Abstract The lower conduction power losses and the positive temperature coefficient that favours parallel connections, make Silicon Carbide (SiC) Metal Oxide Semiconductor Field-Effect Transistors (MOSFETs) to be an excellent replacement of existing Silicon Insulated Gate Bipolar Transistors (IGBTs) technology. These characteristics combined with high switching frequency operation, enables the design of high-accuracy DC-DC converters with minimised filtering requirements. This paper investigates the design for a converter with high-accuracy current (0.9 ppm) supplying a 0.05 H electromagnetic load, aiming to achieve the accuracy without the use of active filters, by using SiC MOSFETs and a scalable module-based converter design.

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Fu, Beinan, Zhiqi Lu, Mochen Xu, Baolei Dong, and Tao Liu. "Design and Simulation Analysis of High Power Density Superboost Circuit." Journal of Physics: Conference Series 2351, no. 1 (October 1, 2022): 012036. http://dx.doi.org/10.1088/1742-6596/2351/1/012036.

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A battery discharge regulator system based on the Superboost converter is presented, and the working principle of the Superboost converter is analyzed. In order to meet the developing requirements of high efficiency and high power density converters, GaN devices are applied to the Superboost circuit to increase the switching frequency of the circuit. Thanks to this, the weight and volume of the passive devices can be reduced, and the power density of the circuit can be increased. In high-frequency conditions, the device parameters of the circuit are designed, and the theoretical derivation of the circuit transfer function is carried out. Finally, simulation software is used to verify the rationality and feasibility of the design.

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Fuse, Masaaki, Hitoshi Sekiya, and Masaharu Uchino. "High Dynamic Range Measurement with Arrayed Frequency Converter." IEEJ Transactions on Fundamentals and Materials 132, no. 1 (2012): 37–43. http://dx.doi.org/10.1541/ieejfms.132.37.

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Golembiovsky, Y. M., D. Y. Lukov, and M. G. Koval. "Bidirectional three-port high-frequency DC/DC-converter." Proceedings of Tomsk State University of Control Systems and Radioelectronics 21, no. 1 (2018): 100–105. http://dx.doi.org/10.21293/1818-0442-2018-21-1-100-105.

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Mochizuki, K., and K. Watanabe. "A high-resolution, linear resistance-to-frequency converter." IEEE Transactions on Instrumentation and Measurement 45, no. 3 (June 1996): 761–64. http://dx.doi.org/10.1109/19.494596.

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Lee, Byung-Kwon, and Jun-Young Lee. "Bidirectional Semiconductor Transformer using high frequency resonant converter." EPE Journal 25, no. 2 (June 2015): 36–43. http://dx.doi.org/10.1080/09398368.2015.11835471.

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Matko, Vojko, and Miro Milanović. "Temperature-compensated capacitance–frequency converter with high resolution." Sensors and Actuators A: Physical 220 (December 2014): 262–69. http://dx.doi.org/10.1016/j.sna.2014.09.022.

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Minami, Ryutaro, Tsuyoshi Kariya, Tsuyoshi Imai, Yoshika Mitsunaka, and Keishi Sakamoto. "High Efficiency Mode Converter for Low-Frequency Gyrotron." Journal of Infrared, Millimeter, and Terahertz Waves 32, no. 3 (September 28, 2010): 311–19. http://dx.doi.org/10.1007/s10762-010-9719-8.

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Karada, Koosuke, and Katsuaki Murata. "Ferroresonant DC-DC converter with high-frequency drive." Electronics and Communications in Japan (Part II: Electronics) 70, no. 1 (1987): 106–14. http://dx.doi.org/10.1002/ecjb.4420700112.

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Subotskaya, Volha, Vratislav Mihal, Mikhail Tulupov, and Bernd Deutschmann. "Optimized gate driver for high-frequency buck converter." e & i Elektrotechnik und Informationstechnik 135, no. 1 (January 9, 2018): 40–47. http://dx.doi.org/10.1007/s00502-017-0570-7.

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Subotskaya, Volha, Emanuele Bodano, and Bernd Deutschmann. "EMI-optimized driver for high-frequency boost converter." e & i Elektrotechnik und Informationstechnik 137, no. 2 (April 2020): 100–106. http://dx.doi.org/10.1007/s00502-020-00795-9.

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Fuse, Masaaki, Hitoshi Sekiya, and Masaharu Uchino. "High Dynamic Range Measurement with Arrayed Frequency Converter." Electrical Engineering in Japan 184, no. 2 (April 19, 2013): 28–35. http://dx.doi.org/10.1002/eej.22367.

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ElMenshawy, Mena, and Ahmed Massoud. "Hybrid Multimodule DC-DC Converters for Ultrafast Electric Vehicle Chargers." Energies 13, no. 18 (September 21, 2020): 4949. http://dx.doi.org/10.3390/en13184949.

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To increase the adoption of electric vehicles (EVs), significant efforts in terms of reducing the charging time are required. Consequently, ultrafast charging (UFC) stations require extensive investigation, particularly considering their higher power level requirements. Accordingly, this paper introduces a hybrid multimodule DC-DC converter-based dual-active bridge (DAB) topology for EV-UFC to achieve high-efficiency and high-power density. The hybrid concept is achieved through employing two different groups of multimodule converters. The first is designed to be in charge of a high fraction of the total required power, operating at a relatively low switching frequency, while the second is designed for a small fraction of the total power, operating at a relatively high switching frequency. To support the power converter controller design, a generalized small-signal model for the hybrid converter is studied. Also, cross feedback output current sharing (CFOCS) control for the hybrid input-series output-parallel (ISOP) converters is examined to ensure uniform power-sharing and ensure the desired fraction of power handled by each multimodule group. The control scheme for a hybrid eight-module ISOP converter of 200 kW is investigated using a reflex charging scheme. The power loss analysis of the hybrid converter is provided and compared to conventional multimodule DC-DC converters. It has been shown that the presented converter can achieve both high efficiency (99.6%) and high power density (10.3 kW/L), compromising between the two other conventional converters. Simulation results are provided using the MatLab/Simulink software to elucidate the presented concept considering parameter mismatches.

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Puidokas, Vytenis, and Albinas J. Marcinkevičius. "High Resolution High Power Low Frequency Digital-to-Analog Converter." Solid State Phenomena 164 (June 2010): 133–38. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.133.

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The architectural scheme of the designed Sigma-Delta DAC on the FPGA is considered. The place of the interpolator in Sigma-Delta DACs is briefly discussed. The summarized structure of the most common interpolators is presented. More applicable structures of interpolators were suggested and analyzed, providing the comparison with [1]. Having changed the structure of the incomplete interpolator and having optimized the stages, it was possible to improve the characteristic of amplitude frequency response with a smaller number of non-zero coefficients and much lower FPGA resources. The paper provides simulated results of the interpolator filter transmission characteristics as well as Sigma-Delta modulator quantization noise parameters. It is demonstrated that simulation of the complete converter system (interpolator + modulator + output filter) allows to identify places of the interpolator, where hardware resources could be saved, thereby reducing the chip area occupied by the converter, which is not always obvious when analyzing nodes separately. Therefore another version of the interpolator was proposed for the system ensuring larger suppression of the additional frequency band in the whole system compared with the previous interpolator. Simulated results related to occupied chip resources are also confirmed by the experiment, which was implemented in Xilinx Spartan FPGA.

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Hakki, A., K. Sadikov, and N. Kashapov. "High Frequency High Power Full Bridge Converter for Plasma Torches." Journal of Physics: Conference Series 789 (January 2017): 012021. http://dx.doi.org/10.1088/1742-6596/789/1/012021.

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