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A study of the high frequency harmonic response of belt amplifiers [PDF]
, 2023 The steady state, harmonic behaviour of the capstan mechanism when used as a harmonic force amplifier was investigated. The investigation was carried out analytically; by numerical simulation; and experimentally over the range 0 to 4 kHz, spanning the low and high frequency regimes of operation of the belt amplifiers tested.
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Harmonics of High Frequency Ventilation at 3hz
Pediatrics, 2018Introduction: High frequency ventilation has allowed clinicians to oxygenate and ventilate patients when conventional ventilation is not sufficient, particularly in premature babies. High frequency ventilation (HFOV) incorporates lung protective strategies including adequate mean airway pressures to sustain alveolar recruitment, and small tidal volumes
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Analysis of High Frequency Harmonics in Distribution Networks: 9 – 150 kHz
2019 IEEE International Conference on Industrial Technology (ICIT), 2019Improvement of power electronic technologies can also introduce various new types of distortions in electrical power systems due to high switching frequency of power converters. The emissions from one device can create noticeable impact on other devices connected to the same system, which may raise immunity concerns.
Jalil Yaghoobi +3 more
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High frequency harmonic imaging in presence of intravascular stents
IEEE Symposium on Ultrasonics, 2003, 2004High frequency second harmonic imaging was compared with fundamental imaging when highly reflective stents were present in the near field of a spherically focused PVDF transducer. Hydrophone measurements of the harmonic beam at 40 MHz showed a relative lower signal strength in the near field compared to the fundamental modes at 20 and 40 MHz.
M.E. Frijlink +3 more
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Effect of leakage inductance on high frequency transformer harmonics
2009 Compatability and Power Electronics, 2009Nowadays, switching power supplies are used in almost all electronic devices to regulate the voltage amplitude. The only obstacle on using these devices is the production of high frequency harmonics that violates different standards such as (FCC, VDE, 461). In this paper the sources of various noises in switching power supplies will be introduced. Then,
Babak Abdi +2 more
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Harmonic wavelet approximation of random, fractal and high frequency signals
Telecommunication Systems, 2009The analysis of a periodic signal with localized random (or high frequency) noise is given by using harmonic wavelets. Since they are orthogonal to the Fourier basis, by defining a projection wavelet operator the signal is automatically decomposed into the localized pulse and the periodic function.
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Propagation characteristics of high-frequency harmonics in distribution systems
2016 IEEE Power and Energy Society General Meeting (PESGM), 2016High-frequency harmonics produced by modern switched mode power supplies have attracted attention in research community recently. To clarify if these harmonics are indeed a potential power quality concern, a research work has been conducted to understand the propagation characteristics of the harmonics.
Ricardo Torquato +4 more
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High-frequency, step tunable, cyclotron harmonic gyrotron
Physics of Fluids B: Plasma Physics, 1991The performance of a high-frequency gyrotron that operates at the fundamental of the electron cyclotron frequency and its higher harmonics is described. The high frequency of 220 GHz (corresponding wavelength 1.35 mm) has been achieved at both the fundamental and second harmonic.
Toshitaka Idehara +6 more
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Analysis of high frequency partials in Bayesian harmonic model
2008 International Conference on Audio, Language and Image Processing, 2008Bayesian harmonic modeling and parameters estimation is a new approach in audio signal synthesizing. However current Bayesian harmonic modeling canpsilat effectively extract high frequency partials. In this paper we propose an improved model with parameters of high frequency partials for audio signal with harmonic modeling.
null Jinghua Yan +3 more
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High-Frequency Harmonic Current Control of Power Converters
2019 IEEE Energy Conversion Congress and Exposition (ECCE), 2019Resonant controllers are widely used in applications like active power filters and identification systems, where control of harmonics of high order (high frequency) is required. In such high-frequency range, to compensate the PWM/computational phase delay is necessary to avoid instability.
Sante Pugliese +3 more
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