Results 21 to 30 of about 172,799 (305)
IEEE Access, 2020 To reveal the penetration characteristics of high-frequency harmonics of the traction network to the three-phase 380 V power system in the traction substation (TSS), the harmonic equivalent circuit model and harmonic penetration mathematical model of the
Yuanzhe Zhao +3 more
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Energy Reports, 2022 Due to the existence of high amount stator current harmonics caused by the inverter nonlinearity, the operation performance of Permanent Magnet Servo System (PMSS) used Proportional–Integral (PI) controller will be affected.
Tianqing Yuan +3 more
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The relationship between bubble concentration and the acoustic emission energy of separate frequency bands [PDF]
JASA Express Letters, 2022 This letter presents the relationship between bubble concentration and the energy ratio of low to high frequency bands of their acoustic emissions. Two sensors, placed perpendicular and concentric to a transmitter, captured the emissions from sonicated ...
Krit Sujarittam, James J. Choi
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Calculation improvement of no-load stray losses in induction motors with experimental validation [PDF]
Serbian Journal of Electrical Engineering, 2015 On the basis of the known fact that all air gap main flux density variations are enclosed by permeance slot harmonics, only one component of stray losses in rotor (stator) iron is considered in the new classification, instead of 2 components ...
Kostić Miloje M.
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Applied Sciences, 2020 The current signal harmonic detection method(s) cannot reduce the errors in the analysis and extraction of mixed harmonics in the power grid. This paper designs a harmonic detection method based on discrete Fourier transform (DFT) and discrete wavelet ...
Guishuo Wang, Xiaoli Wang, Chen Zhao
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Induction Motor Direct Torque Control with Synchronous PWM
Energies, 2021 A novel induction motor direct torque control (DTC) algorithm with synchronous modulation is presented. Compared to the traditional DTC method, whose main drawback is the presence of low-frequency torque harmonics (sub-harmonics), in the proposed method,
Alessandro Benevieri +4 more
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Harmonics and Interharmonics Detection Based on Synchrosqueezing Adaptive S-Transform
Energies, 2022 The integration of renewable energy generation and nonlinear power electronic equipment into the grid brings about complex harmonics and interharmonics problems.
Zhaoyu Lou +3 more
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World Electric Vehicle Journal, 2021 Due to their advantages of high power density and high efficiency, permanent magnet synchronous machines (PMSMs) are widely used in the field of electric vehicles (EVs). Vibration and noise are important indicators for evaluating the performance of PMSMs,
Zhenkang Feng +6 more
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IEEE Access, 2023 An improved modulation method is proposed for two parallel three-level interleaved rectifiers to reduce current harmonics and high-frequency zero-sequence circulating current, which uses sinusoidal pulse width modulation.
Yanfeng Li +3 more
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Harmonic emission from high-power high-frequency gyrotrons [PDF]
International Journal of Electronics, 1984 Abstract The results of a study of second-harmonic emission from a gyrotron designed for high-power high-frequency operation at the fundamental of the cyclotron frequency are presented. Stable, very narrow bandwidth second-harmonic cavity emission from 209 GHz to 302 GHz has been observed. An output power of 25 kW and efficiency of 6·5% in the TE11, 2,
J. L. BYERLY +5 more
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