9,097 resources related to Switching frequency
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2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting
The joint meeting is intended to provide an international forum for the exchange of information on state of the art research in the area of antennas and propagation, electromagnetic engineering and radio science
Energy conversion and conditioning technologies, power electronics, adjustable speed drives and their applications, power electronics for smarter grid, energy efficiency,technologies for sustainable energy systems, converters and power supplies
The CDC is the premier conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, automatic control, and related areas.
APEC focuses on the practical and applied aspects of the power electronics business. Not just a power designer’s conference, APEC has something of interest for anyone involved in power electronics including:- Equipment OEMs that use power supplies and converters in their equipment- Designers of power supplies, dc-dc converters, motor drives, uninterruptable power supplies, inverters and any other power electronic circuits, equipments and systems- Manufacturers and suppliers of components and assemblies used in power electronics- Manufacturing, quality and test engineers involved with power electronics equipment- Marketing, sales and anyone involved in the business of power electronic- Compliance engineers testing and qualifying power electronics equipment or equipment that uses power electronics
The 2020 IEEE International Conference on Systems, Man, and Cybernetics (SMC 2020) will be held in Metro Toronto Convention Centre (MTCC), Toronto, Ontario, Canada. SMC 2020 is the flagship conference of the IEEE Systems, Man, and Cybernetics Society. It provides an international forum for researchers and practitioners to report most recent innovations and developments, summarize state-of-the-art, and exchange ideas and advances in all aspects of systems science and engineering, human machine systems, and cybernetics. Advances in these fields have increasing importance in the creation of intelligent environments involving technologies interacting with humans to provide an enriching experience and thereby improve quality of life. Papers related to the conference theme are solicited, including theories, methodologies, and emerging applications. Contributions to theory and practice, including but not limited to the following technical areas, are invited.
Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.
Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission
Broadcast technology, including devices, equipment, techniques, and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.
Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.
IEEE Communications Magazine was the number three most-cited journal in telecommunications and the number eighteen cited journal in electrical and electronics engineering in 2004, according to the annual Journal Citation Report (2004 edition) published by the Institute for Scientific Information. Read more at http://www.ieee.org/products/citations.html. This magazine covers all areas of communications such as lightwave telecommunications, high-speed data communications, personal communications ...
2017 International Conference on Communication and Signal Processing (ICCSP), 2017
It's been a challenging task to distribute power in subsea oil and gas stations. In such high power applications ZCS based converters are more preferable as it uses switches like IGBT, GTO etc. This paper deals with the zero current switching full bridge dc-dc conversion. At the input side each modules are connected in series and at output side all ...
2009 IEEE Bucharest PowerTech, 2009
This paper studies practical design aspects of a high-power DC-DC converter which might be employed with renewable power sources like large offshore wind farms. The component selection and losses are studied for a 6.8 kV/100 kV, 5 MW step-up DC/DC converter. It is concluded that inverter-grade thyristors offer overall advantages because of ability to operate at high switching frequencies. The ...
IEEE Conference Record - Abstracts. 1991 IEEE International Conference on Plasma Science, 1991
Proceedings of International Conference on Power Electronics, Drives and Energy Systems for Industrial Growth, 1996
A new buck zero-voltage-switching quasi-resonant power converter operating at constant switching frequency is discussed. Its output voltage is regulated by controlling the freewheeling period of the resonant inductor. In addition to better controllability, it possesses the advantages of PWM and frequency- modulated power converters. The principle of operation, state-plane plots, steady-state characteristics, design procedure and simulation of this buck constant ...
Power Electronics for Renewable Energy Systems, Transportation and Industrial Applications, None
The chapter points out that sequential switching is not only applicable to IGBT modules with integrated diodes mounted closely on a heat sink, but also to complete industrial standard two‐level voltage source inverters (VSIs). Thus, the power capability and the overall switching frequency of these products can be increased by using several of them in parallel with sequential switching. Using ...
IMS 2014: Broadband Continuous-mode Power Amplifiers
A Sub-mmW All-Passive Front-end with Implicit Capacitive Stacking - Vijaya K. Purushothaman - RFIC 2019 Showcase
Optimal Design of NPC and Active-NPC Transformerless PV Inverters
IMS 2015: Robert H. Caverly - Aspects of Magnetic Resonance Imaging
IMS 2014:Active 600GHz Frequency Multiplier-by-Six S-MMICs for Submillimeter-Wave Generation
Ultrafast Spintronics: Advanced Nanodevices - Jeff Bokor at INC 2019
IMS 2011 Microapps - Local Fundamental Frequency Enhancements for X-Parameter Models
IMS 2012 Microapps - Practical Electromagnetic Modeling of Parallel Plate Capacitors at High Frequency
IMS 2014: Super High Bit Rate Radio Access Technologies for Small Cells Using Higher Frequency Bands
IMS 2011 Microapps - Understanding the Proper Dielectric Constant of High Frequency Laminates to Be Used for Circuit Modeling and Design
Switching, Routing & Forwarding: Technical Session 1 - HPSR 2020 Virtual Conference
GaN HEMTs and Schottky Diodes
Energy Efficiency of MRR-based BDD Circuits - Ozan Yakar - ICRC San Mateo, 2019
The Intergrid - Safe, Dependable, Sustainable: IECON 2018
A Highly-Efficient 138?170GHz SiGe HBT Frequency Doubler for PowerConstrained Applications: RFIC Interactive Forum
Recurrent Neural Networks for System Identification, Forecasting and Control
An 8-10GHz Upconversion Mixer, with a Low-Frequency Calibration Loop Resulting in Better Than -73dBc In-Band Spurs: RFIC Interactive Forum
Ultrafast Photonics Time Frequency Signal Processing Using Integrated Photonics: An IPC Keynote with Andrew M. Weiner
Mark Dehong Xu, Distinguished Lecturer
It's been a challenging task to distribute power in subsea oil and gas stations. In such high power applications ZCS based converters are more preferable as it uses switches like IGBT, GTO etc. This paper deals with the zero current switching full bridge dc-dc conversion. At the input side each modules are connected in series and at output side all bridge connections connected parallel. Input side inductances and output capacitances minimize ripple contents present in the system. The proposed system minimizes the losses due to diodes in the output side by replacing switches and also provides flexibility in the output voltage.
This paper studies practical design aspects of a high-power DC-DC converter which might be employed with renewable power sources like large offshore wind farms. The component selection and losses are studied for a 6.8 kV/100 kV, 5 MW step-up DC/DC converter. It is concluded that inverter-grade thyristors offer overall advantages because of ability to operate at high switching frequencies. The converter operates at all zero current switchings and therefore an increase in the operating frequency has minimal effect on the efficiency. The detailed converter modelling at switch level indicates that the converter efficiency will be around 96-97%. Better efficiencies are possible with phase-control thyristors, but this would come at the expense of significant increase in the size and weight of the passive components. The dimensions and weight of the crucial passive components are calculated and the largest air-core inductor may weigh around 610 kg. The converter responses are simulated for reference step changes and the detailed steady-state curves are analysed. The converter is further tested for the worst case fault conditions. The simulations indicate that the converter will not propagate fault currents, if the converter components are adequately selected.
A new buck zero-voltage-switching quasi-resonant power converter operating at constant switching frequency is discussed. Its output voltage is regulated by controlling the freewheeling period of the resonant inductor. In addition to better controllability, it possesses the advantages of PWM and frequency- modulated power converters. The principle of operation, state-plane plots, steady-state characteristics, design procedure and simulation of this buck constant frequency zero-voltage-switching quasi-resonant power converter (CF- ZVS-QRC) are presented.
The chapter points out that sequential switching is not only applicable to IGBT modules with integrated diodes mounted closely on a heat sink, but also to complete industrial standard two‐level voltage source inverters (VSIs). Thus, the power capability and the overall switching frequency of these products can be increased by using several of them in parallel with sequential switching. Using this approach, a novel electrical test bench for drive inverters can be set up with a minimum effort on design and development. This provides an alternative for manufacturers of drive inverters to test their complete product range under real power levels without the requirement for a multitude of real machines.The discussion provided in the chapter proves that the so called virtual machine (VM) is a Hardware‐in‐the‐Loop system allowing an inverter to be tested at real power levels without the need for installing and operating real machines. The VM has the same characteristics as a real induction motor or even a synchronous motor. Different machines and their respective load conditions can be emulated by software, which means that the drive inverter under test can operate in its normal mode (as usual). No modification has to be done to the inverter or to the control unit.
A novel half-bridge LLC DC-DC Resonant Converter for high power DC power supply is presented in this paper. The design consideration of resonant tank circuit paramerters are presented. The DC gain characteristics of the proposed converter is analyzed from its complex DC gain equation. First the performance of the converter is analyzed through simulation. The proposed converter operate with higher frequency of operation and from the light load to full load point in characteristics ZVS/ZCS (zero voltage switching/zero current switching) turn on and low current turn off is achieved in variable frequency open-loop control range. An experimental prototype of 2.1 kW has been built according to the parameters consideration and calculated tank circuit parameters. Variable frequency control is implemented through DSP for the regulation of output voltage in open-loop. The converter maintains ZVS in the entire range of open-loop control from 5 to 15 kHz.
To improve the reliability of dc microgrids operation, an enhanced power line communication (PLC) strategy is proposed using switching frequency modulation (SFM) of a power converter. The proposed PLC strategy uses the voltage ripple on the dc bus voltage, which is inherently generated by converter's switching activities as an information signal. By using the SFM, all microgrid components sharing the dc bus as communication channel can obtain power flow information with fast Fourier transform analysis of dc bus line frequency. In addition, the operating performance of the dc bus voltage regulator is enhanced over a range of light load conditions. The proposed PLC strategy and design of modulated frequency range are verified through experimental results using a 3.3 kW prototype dual active bridge converter.
A thorough analysis of a scalar control method for the operation of direct frequency changers (DFC) using bidirectional switches operating at high switching frequencies is proposed. The method allows full control over voltage and frequency at the output port and the input side power displacement factor, with little effect on the frequency spectrum of either the output voltage or input currents. The method uses the instantaneous voltage ratio of specific input phase voltages to generate the active and zero states of the various switches. A voltage transfer ratio as high as 0.87 is obtained under synchronous and asynchronous operation with a conventionally connected three- phase load. Analysis shows that the input power displacement factor is independent of load characteristics. The power displacement can be precisely controlled by proper adjustments of the timing sequence. Synchronization error in the timing sequence affects both the input power displacement and the voltage transfer ratio.<<ETX>>
Most of the soft-switching power converters, especially zero-current switching resonant converters, are required to vary switching frequency to control their output voltage. A family of newly designed zero-current switching fixed frequency square wave resonant converters is proposed. The output voltage of these converters can be controlled by the on-state period of a semiconductor switch; and therefore, they can be operated at a fixed switching frequency. All of the switching devices are in the zero-current switching condition. Also, the peak current of each switching device is minimized. Computer simulation and experimental results are presented to support the operation of the converters.
A soft switching boost converter with zero-voltage transition (ZVT) main switch using zero-current switching (ZCS) auxiliary switch is proposed. Operating intervals of the converter are presented and analyzed. Design considerations are discussed. A design example with experimental results obtained from a 600 W, 100 kHz, 380 V output, power factor corrected, ac-to- dc, boost converter using insulated gate bipolar transistors (IGBTs) is presented, Results show that the main switch maintains ZVT while the auxiliary switch retains ZCS for the complete specified line and load conditions.
This standard covers drawout type, indoor, medium-voltage ground and test (G&T) devices for use in drawout metal-clad switchgear rated 4.76 kV through 38 kV as described in IEEE Std C37.20.2. Four G&T device types are generally supplied for temporary circuit maintenance procedures for insertion in place of the circuit breaker as follows: a) Simple manual devices b) Complex manual devices ...