Relevant bibliographies by topics / Fundamental switching frequency

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Fundamental switching frequency'

Author: Grafiati
Published: 4 June 2025
Last updated: 15 July 2025

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Journal articles on the topic "Fundamental switching frequency"

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Suresh, S., S. Kannan, and S. Ponnayira Sundaravel. "A Modified Single Phase H-Bridge Inverter for High Power Applications with Power Quality Improvement." Applied Mechanics and Materials 626 (August 2014): 118–26. http://dx.doi.org/10.4028/www.scientific.net/amm.626.118.

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Various multilevel inverter topologies are widely being used for real power exchange, reactive power compensation, harmonic current mitigation on grid and industrial drive applications with fundamental frequency switching mode of gate control. Still so many topologies are being currently developed with reduced number of switches, improved waveform for power quality improvement with fundamental frequency switching and pwm switching gate control mode. This paper presents the performance analysis of modified H-bridge single phase inverter for high voltage and high power applications. The switching method has been selected to operate the inverter at fundamental frequency switching mode of gate control to be free from lower order harmonics. The inverter has the modulation technique with pre calculated switching angles to generate the required fundamental voltage with reduced Total Harmonic Distortion (THD). So, the switching losses have been reduced hence the efficiency is improved with Power Quality (PQ) improvement in voltage-current waveform. The DC input power is feed to the inverter from DC capacitor voltage divider source, contributed to give various dc voltage levels during fundamental frequency switching of different switching combinations for the generation of stepping output voltage. During dynamic load condition, the magnitude of input dc voltage level across each capacitor has not undergone through big swing to feed the power to the load without affecting generated output ac voltage. The performance of the proposed inverter has been analyzed for dynamic reactive load and induction motor. The MATLAB based simulations have been presented to validate the inverter operation for dynamic reactive load and industrial drive applications with pre calculated THD reduced switching conduction angles for PQ improvement in waveform.
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Zhang, Xiang, Yunlong Chen, Yves Mollet, Jiaqiang Yang, and Johan Gyselinck. "An Accurate Discrete Current Controller for High-Speed PMSMs/Gs in Flywheel Applications." Energies 13, no. 6 (2020): 1458. http://dx.doi.org/10.3390/en13061458.

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High-speed Permanent-Magnet Synchronous Motors/Generators (PMSMs/Gs) in a Flywheel Energy Storage System (FESS) are faced with high cross-coupling voltages and low switching-to-fundamental frequency ratios. High cross-coupling voltages between d-q axis current loops lead to transient current errors, which is more serious at lower switching-to-fundamental-frequency ratios. If the delays are not properly considered during the current controller design in a digital control system, the low switching-to-fundamental-frequency ratios may result in oscillatory or unstable responses. In this study, an accurate discrete current controller for high-speed PMSMs/Gs is proposed based on an accurate discrete model that takes the phase and magnitude errors generated during the sampling period into consideration, and an Extended State Observer (ESO) is applied to estimate and compensate the back EMF error. The cross-coupling problem is well settled, and the current loop dynamic at lower switching-to-fundamental frequency ratios is improved. Finally, the proposed discrete controller is validated on a 12,000 rpm PMSM/G prototype.
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WANG, XIAOBIN. "RADIO FREQUENCY MAGNETIZATION NONVOLATILITY." SPIN 02, no. 03 (2012): 1240009. http://dx.doi.org/10.1142/s2010324712400097.

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Long time magnetization thermal switching under small amplitude high frequency excitation is analyzed. Approaches based upon conventional time-dependent energy barrier are not sufficient to describe magnetization nonvolatility under GHz excitations. Methods based upon large angle nonlinear magnetization dynamics are developed for both coherent and noncoherent magnetization switching. This dynamic approach is not only important for fundamental understanding of magnetization dynamics under combined radio frequency excitations and thermal fluctuations, but also critical for practical design of emerging spintronic devices. When applied to spin torque random access memory read operations, as sensing current duration reaches nanosecond, dynamic approach gives a switching probability estimation orders of magnitude different from that obtained from conventional time-dependent energy barrier approach.
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Ordin, Mikhail, and Ineke Mennen. "Cross-Linguistic Differences in Bilinguals' Fundamental Frequency Ranges." Journal of Speech, Language, and Hearing Research 60, no. 6 (2017): 1493–506. http://dx.doi.org/10.1044/2016_jslhr-s-16-0315.

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Purpose We investigated cross-linguistic differences in fundamental frequency range (FFR) in Welsh-English bilingual speech. This is the first study that reports gender-specific behavior in switching FFRs across languages in bilingual speech. Method FFR was conceptualized as a behavioral pattern using measures of span (range of fundamental frequency—in semitones—covered by the speaker's voice) and level (overall height of fundamental frequency maxima, minima, and means of speaker's voice) in each language. Results FFR measures were taken from recordings of 30 Welsh-English bilinguals (14 women and 16 men), who read 70 semantically matched sentences, 35 in each language. Comparisons were made within speakers across languages, separately in male and female speech. Language background and language use information was elicited for qualitative analysis of extralinguistic factors that might affect the FFR. Conclusions Cross-linguistic differences in FFR were found to be consistent across female bilinguals but random across male bilinguals. Most female bilinguals showed distinct FFRs for each language. Most male bilinguals, however, were found not to change their FFR when switching languages. Those who did change used different strategies than women when differentiating FFRs between languages. Detected cross-linguistic differences in FFR can be explained by sociocultural factors. Therefore, sociolinguistic factors are to be taken into account in any further study of language-specific pitch setting and cross-linguistic differences in FFR.
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Hu, Yueqiang, and Fengguang Jiang. "Harmonic Voltage Amplitude Calculation and Fundamental Amplitude Correction Based on Synchronized SVPWM of Two-level VSI under Low Switching Frequency." Journal of Physics: Conference Series 2434, no. 1 (2023): 012004. http://dx.doi.org/10.1088/1742-6596/2434/1/012004.

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Abstract The switching frequency of two-level VSI is usually limited to a very low level for high-power drives to minimize the switching losses. For the synchronized SVPWM under low switching frequency, there will be a relative deviation of fundamental amplitude between the output voltage and the reference voltage. To solve this problem, in this paper, a method to calculate the amplitude of output phase voltage harmonics under synchronized SVPWM is proposed, and an online fundamental amplitude correction method is proposed based on this calculation result.
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Anishchenko, Vadim, and Aleksander Neiman. "Stochastic resonance and stochastic synchronization." Izvestiya VUZ. Applied Nonlinear Dynamics 5, no. 1 (1997): 5–14. http://dx.doi.org/10.18500/0869-6632-1997-5-1-5-14.

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The fundamental phenomenon of synchronization occurs in non-lirear self—sustained oscillators subjecled to а periodic force or coupled with each other. This phenomenon manifests itself in locking or suppressing of the natural frequency of the oscillator by periodic force. In this paper we discuss surprising synchronization like phenomena in stochastic bistable systems which have no natural frequency at all. A stochastic bistable system possesses а noise—controlled mean switching frequeicy between metastable states being ап analogy of the natural frequency. The stochastic synchronization reveals locking of the mean switching frequency by external pericdic force. The same phenomenon can be observed in coupled stochastic bistable systemis.
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Ganguly, Avishek. "HARMONIC ANALYSIS OF TRANSFORMER’S MAGNETIC INRUSH AND FAULT CURRENT WITH FFT." International Journal of Engineering Applied Sciences and Technology 6, no. 11 (2022): 165–69. http://dx.doi.org/10.33564/ijeast.2022.v06i11.031.

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The distorted voltage or current waveform (not purely sinusoidal) contains harmonics. The frequency of harmonics may be integer multiple or fraction of fundamental frequency. Increase of power electronic loads, faults in power system, switching of induction motors, transformer switching, magnetic saturation of transformers core are several reasons of harmonic pollution.
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Mino, Kazuaki, Yasuhiro Okuma, and Kazuo Kuroki. "Fundamental operation of direct linked frequency changer with bilateral switching circuits." Electrical Engineering in Japan 128, no. 1 (1999): 53–61. http://dx.doi.org/10.1002/(sici)1520-6416(19990715)128:1<53::aid-eej7>3.0.co;2-b.

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Devineni, Gireesh Kumar, Aman Ganesh, and Neerudi Bhoopal. "Power Loss Analysis in 15 Level Asymmetric Reduced Switch Inverter Using PLECS Thermal Model & SIMULINK Precise Models." Journal Européen des Systèmes Automatisés 54, no. 1 (2021): 73–84. http://dx.doi.org/10.18280/jesa.540109.

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Power losses are the most critical metrics in power converters analysis and has a significant impact on economic and technological assessments due to its sufficient approximation. This article aims to prove that the power losses (Switching &amp; Conduction losses) are very low in low frequency switching modulation in contrast with high switching frequency modulation. Two switching modulation techniques Phase Disposition (PD-multi carrier-based pulse width modulation at high switching frequency) and Selective Harmonic Elimination Pulse Width Modulation (SHEPWM-fundamental switching frequency) are considered for the power loss assessment in 15-level reduced switch asymmetric multi-level inverter. This work proposed a simplified model for calculation of switching losses in multilevel inverters using MATAB SIMULINK. Further, the thermal model of the proposed inverter is implemented on PLECS for analyzing the power losses. The comparative analysis of switching and conduction losses of the proposed inverter with the PLECS thermal model and MATLAB precise models are integral part of this research.
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Devineni, Gireesh Kumar, and Aman Ganesh. "Problem Formulations, Solving Strategies, Implementation Methods & Applications of Selective Harmonic Elimination for Multilevel Converters." Journal Européen des Systèmes Automatisés 53, no. 6 (2020): 939–52. http://dx.doi.org/10.18280/jesa.530620.

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Multilevel converters are commonly recommended for converting DC power to AC as per load requirements owing to several advantages such as common mode voltage, less distorted input current, low switching frequency and reduced THD. However, the reliability, performance and efficiency of MLIs depend in particular on the switching technique used. The Selective Harmonic Elimination PWM approach is more efficient among existing modulation techniques to remove undesired harmonics from the output of MLI, since it operates at low switching frequency, particularly at fundamental frequency. The fundamental switching frequency operation of SHEPWM reduce the switching losses and improves inverter efficiency. The principal problem, however, is the empirical approach to non-linear equations. Numerous algorithms have been developed and implemented over the last decades including computational approaches, analytical methods, algebraic methods and optimization algorithms to solve the SHE equations and to eliminate the unintended harmonics. This article presented various aspects of SHE problem formulations, the comprehensive philosophy of operation of various SHE problem-solving approaches and the application of multilevel inverters. PWM waveforms, with single and multiple transitions, are examined and shown at each voltage level for solution frameworks that suit multiple solutions for pulse width modulation to allow researchers gain a deeper understanding and solution of SHE problems.
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Dissertations / Theses on the topic "Fundamental switching frequency"

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Pacce, Matías José. "Essays on Business Cycles Fluctuations and Forecasting Methods." Doctoral thesis, Universidad de Alicante, 2017. http://hdl.handle.net/10045/71346.

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This doctoral dissertation proposes methodologies which, from a linear or a non-linear approach, accommodate to the information flow and can deal with a large amount of data. The empirical application of the proposed methodologies contributes to answer some of the questions that have emerged or that it has potentiated after the 2008 global crisis. Thus, essential aspects of the macroeconomic analysis are studied, like the identification and forecast of business cycles turning points, the business cycles interactions between countries or the development of tools able to forecast the evolution of key economic indicators based on new data sources, like those which emerge from search engines.
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Books on the topic "Fundamental switching frequency"

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Vaez-Zadeh, Sadegh. Rotor Position and Speed Estimation. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198742968.003.0006.

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The ultimate importance of rotor position and speed information in permanent magnet synchronous (PMS) machines control, and the industry interest to the rotor and speed sensorless systems as a cost-saving and practical alternative to the motor control with mechanical sensors are emphasized. Major position and speed estimation schemes are then presented in detail. These are the: back electromotive force (EMF)-based method; flux linkage method; hypothesis rotor position method; saliency-based method, including high frequency signal injection and inverter switching harmonics schemes; and finally, the observer-based method, including state observer and extended Kalman filter-based schemes. Each scheme was discussed by presenting the corresponding fundamental principles, followed by the appropriate motor model, estimation procedure, and the implementation. Demanding criteria such as accuracy, robustness, swiftness, and capability of working over the entire range of motor operation are discussed with each method.
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Book chapters on the topic "Fundamental switching frequency"

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Ni, Shuangwu, Jianhui Su, Jinwei Li, Hang Gao, and Songlin Zhou. "A staircase modulation scheme for the MMC allowing fundamental switching frequency." In Electronics, Information Technology and Intellectualization. CRC Press, 2014. http://dx.doi.org/10.1201/b17988-25.

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Vishnu Padma, Padala, K. Varalakshmi, and M. K. Singh. "Circuit Analysis of Multilevel Converter for High-Power Applications." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220741.

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This paper analyses a multilevel inverter configuration which provides single-phase seven-level output. This topology partially adopts the packed u-cell structure and uses series connected DC sources to generate the required number of output voltage levels. The DC-link capacitors are not required in this topology. The operating modes and modulation scheme of this multilevel inverter are explained in detail. For applications requiring high voltage and high power, multilayer inverters (MLI) are one of the most popular choices. Higher voltage levels can be generated with MLI, despite the fact that lower rating components are used. MLI provides greater voltage level, which minimizes total harmonic distortion (THD), and MLI operates at a lower switching frequency than a standard DC-AC inverter, resulting in lower overall power consumption. There are several alternative modulation approaches for MLI that are dependent on either the fundamental switching frequency or the high switching frequency of the device.
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Strauss, James H. "Recombination in the Evolution of RNA Viruses." In Emerging Viruses. Oxford University PressNew York, NY, 1993. http://dx.doi.org/10.1093/oso/9780195074444.003.0023.

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Abstract Recombination is a fundamental mechanism of genetic variation that results from the reshuffling of genetic material by processes including reassortment of chromosomes, breakage of a chromosome followed by rejoining to a chromosome from a second parent, or by a replicase enzyme switching strands during replication of the nucleic acid. Recombination in viruses is now known to arise from all of these mechanisms. The high frequency recombination characteristic of influenza virus and other viruses with segmented genomes has been well documented. This occurs by reassortment of the individual segments to make new combinations during mixed infection of cells with two virus strains. Within the past few years it has also become clear that recombination also plays a role in the evolution of viruses whose entire genome is a single piece of RNA. I will here discuss evidence for recombination in such viruses and the role of recombination in viral evolution.
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Conference papers on the topic "Fundamental switching frequency"

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Gaines, Jordan A., Karthik V. Myilswamy, Joseph M. Lukens, and Andrew M. Weiner. "Frequency Comb of Spectrally Pure Biphotons Using Time-Varying Cavities." In CLEO: Fundamental Science. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_fs.2024.ftu4f.1.

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We propose and analyze the use of linear, time-variant cavities to spectrally compress broadband frequency-correlated photon pairs into combs of spectrally pure biphotons. Our approach relies on rapid switching of input coupling to the cavity.
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Sideris, Antonios V., Georgios K. Sakkas, and Antonios G. Kladas. "Efficiency Improvement in Surface Mounted PMSM by Appropriate Management of Both Fundamental and Switching Frequency Iron Losses." In 2024 International Conference on Electrical Machines (ICEM). IEEE, 2024. http://dx.doi.org/10.1109/icem60801.2024.10700316.

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Häring, Johannes, Mark-M. Bakran, Maximilian Hepp, and Wolfgang Wondrak. "Improving the Fault-Tolerant Operating Range of Automotive 3-Level Inverters by Using Asymmetrical Fundamental Frequency Switching." In 2024 Energy Conversion Congress & Expo Europe (ECCE Europe). IEEE, 2024. http://dx.doi.org/10.1109/ecceeurope62508.2024.10752082.

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Loos, Jan, Kerstin Siebert, and Holger Hirsch. "Modeling of a Two-Level Inverter with an SPMSM as Part of a Load Sided Resonant Inverter Under Fundamental Frequency Switching Operation." In 2025 7th Global Power, Energy and Communication Conference (GPECOM). IEEE, 2025. https://doi.org/10.1109/gpecom65896.2025.11061831.

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Ilves, Kalle, Antonios Antonopoulos, Lennart Harnefors, Staffan Norrga, and Hans-Peter Nee. "Circulating current control in modular multilevel converters with fundamental switching frequency." In 2012 7th International Power Electronics and Motion Control Conference (IPEMC 2012). IEEE, 2012. http://dx.doi.org/10.1109/ipemc.2012.6258844.

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Koenig, Simon, and Gerhard Herold. "Twelve-pulse multilevel current source inverters for fundamental frequency switching schemes." In 2014 16th International Conference on Harmonics and Quality of Power (ICHQP). IEEE, 2014. http://dx.doi.org/10.1109/ichqp.2014.6842844.

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Kobyakov, A., V. P. Torchigin, E. Schmidt, and F. Lederer. "Phase-Insensitive, Ultrafast All-Optical Switch Based on Parametric Down-Conversion." In Photonics in Switching. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/ps.1997.pthc3.

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In a search for all-optical signal processing elements operating at a picosecond time scale nonlinear phenomena in quadratic media, extensively studied since many years in a different context were revisited lately. However, all devices proposed and implemented to date (see [1,2] and Refs, therein) have certain drawbacks complicating their use as all-optical amplifying/switching devices, viz., low amplification because of a strong control signal in intensity-controlled devices, smooth switching characteristics of Mach-Zehnder interferometers, and a requirement of fast phase control in phase-sensitive devices [3]. A key requirement of all devices proposed until now is the coherence of pump and signal beams because the χ(2)-process strongly depends on the relative phase. Here we demonstrate that this phase-insensitive amplification/switching can be achieved by a three wave interaction even with reduced pump power requirements. In what follows we focus on the so-called vectorial or type II SHG where two orthogonally polarized fundamental frequency (FF) components A1 and A2 interact with the only second harmonic (SH) wave B polarized parallel to one of the fundamentals [2].
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Srinivas, Kadagala Venkata, and Bhim Singh. "Three-Level 24-Pulse STATCOM with Pulse Width Control at Fundamental Frequency Switching." In 2010 IEEE Industry Applications Society Annual Meeting. IEEE, 2010. http://dx.doi.org/10.1109/ias.2010.5614638.

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Edpuganti, Amarendra, and Akshay K. Rathore. "Fundamental switching frequency optimal pulsewidth modulation of medium voltage cascaded seven-level inverter." In 2014 IEEE Industry Applications Society Annual Meeting. IEEE, 2014. http://dx.doi.org/10.1109/ias.2014.6978396.

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Yarlagadda, Anil Kumar, and Vimlesh Verma. "Single Phase 17-Level Asymmetric CHB Multilevel Inverter Using Fundamental Switching Frequency Modulation." In 2022 2nd International Conference on Emerging Frontiers in Electrical and Electronic Technologies (ICEFEET). IEEE, 2022. http://dx.doi.org/10.1109/icefeet51821.2022.9847957.

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