Results 271 to 280 of about 1,518,407 (321)
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A low frequency oscillator structure
2009 European Conference on Circuit Theory and Design, 2009We propose a novel RC sinusoidal oscillator architecture suitable for very low frequency generation. The oscillator is also attractive in the sense that the lower the oscillation frequency, the lower the necessary gain required to start oscillations. Further, the proposed architecture is active-circuit-independent and can be realized in any suitable ...
A. S. Elwakil, S. Ozoguz
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Low Frequency Oscillation Traceability and Suppression in Railway Electrification Systems
IEEE transactions on industry applications, 2019The low frequency oscillation (LFO) phenomenon has frequently occurred in railway electrification systems (RESs) and deteriorates the safety and reliability of RESs.
Yi Zhou +5 more
semanticscholar +1 more source
IEEE Transactions on Industrial Informatics, 2019
The traction network voltage low-frequency oscillation (LFO) in high-speed railways easily leads to the traction blockade of electric multiple units (EMUs), which seriously affects the normal operation of high-speed railways.
Zhigang Liu +4 more
semanticscholar +1 more source
The traction network voltage low-frequency oscillation (LFO) in high-speed railways easily leads to the traction blockade of electric multiple units (EMUs), which seriously affects the normal operation of high-speed railways.
Zhigang Liu +4 more
semanticscholar +1 more source
IEEE Transactions on Power Delivery, 2019
A reduced-order dynamic phasor model of modular multilevel converter (MMC) in long time scale, which is applied for power system low-frequency oscillation analysis, is investigated.
Shu Zhu +7 more
semanticscholar +1 more source
A reduced-order dynamic phasor model of modular multilevel converter (MMC) in long time scale, which is applied for power system low-frequency oscillation analysis, is investigated.
Shu Zhu +7 more
semanticscholar +1 more source
Low-frequency diffusion flame oscillations
Combustion and Flame, 1975Abstract The low-frequency oscillation that is characteristic of small-scale diffusion flames is also shown to dominate the so-called turbulent flamebrush even at flowrates high enough to lift the flame from the burner. For free diffusion flames, the frequency of oscillation is always of the order of 10 Hz and is not affected by either the dimensions
A.J. Grant, J.M. Jones
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IEEE Transactions on Power Systems, 2018
The traction blockade in depots of multiple electric multiple units (EMUs) is generally considered to be caused by the voltage low frequency oscillation (LFO) of the high-speed railway traction network.
Zhigang Liu, Z. Geng, X. Hu
semanticscholar +1 more source
The traction blockade in depots of multiple electric multiple units (EMUs) is generally considered to be caused by the voltage low frequency oscillation (LFO) of the high-speed railway traction network.
Zhigang Liu, Z. Geng, X. Hu
semanticscholar +1 more source
Amplitude stabilized low frequency oscillator†
International Journal of Electronics, 1972Abstract The paper describes an amplitude stabilized very low frequency sinusoidal oscillator generating a frequency as low as 0.01 Hz. It uses a second-order all-pass network and an operational amplifier interconnected in a feedback loop to form a highly selective amplifier.
S. K. DAS, GITA DAS
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Thermally induced low-frequency oscillations
ZAMP Zeitschrift f�r angewandte Mathematik und Physik, 1985This paper discusses nonlinear thermally induced oscillations in quasi- one dimensional flows in ducts. In practice such oscillations are frequently observed in furnaces and combustion chambers. The problem considered involves entropy disturbances which are convected through a nozzle at the end of a tube, thereby producing an acoustic wave which ...
Keller, J. J., Egli, W., Hellat, J.
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IEEE Transactions on Transportation Electrification, 2018
In recent years, low-frequency oscillation (LFO) events sometimes occur between the traction network and the electric motive units (EMUs) in vehicle-grid systems of a high-speed railway when multiple EMUs access the traction network.
Zhigang Liu, X. Hu, Y. Liao
semanticscholar +1 more source
In recent years, low-frequency oscillation (LFO) events sometimes occur between the traction network and the electric motive units (EMUs) in vehicle-grid systems of a high-speed railway when multiple EMUs access the traction network.
Zhigang Liu, X. Hu, Y. Liao
semanticscholar +1 more source
IEEE transactions on industry applications, 2018
With the increasing number of electric locomotives and electric multiple units (EMU) operating in one power section simultaneously, low-frequency oscillation (LFO) may occur.
Keteng Jiang, Chengxiang Zhang, X. Ge
semanticscholar +1 more source
With the increasing number of electric locomotives and electric multiple units (EMU) operating in one power section simultaneously, low-frequency oscillation (LFO) may occur.
Keteng Jiang, Chengxiang Zhang, X. Ge
semanticscholar +1 more source