Results 51 to 60 of about 3,295,289 (198)

Distributed Frequency-Locked Loops for Wireless Networks

, 2008
The establishment of a common frequency refer ence in a distributed wireless network is a critical factor in enabling cooperative communication strategies.
N. Varanese, Simeone, Osvaldo, Y. Bar Ness, VARANESE, NICOLA, SPAGNOLINI, UMBERTO, U. Spagnolini, O. Simeone, Bar-Ness, Yeheskel, Y. Bar-Ness   +8 more
core   +1 more source

A sensorless control scheme based on fractional order super-twisting algorithm and improved FLL for PMSM

Advances in Mechanical Engineering
To further improve the accuracy of sensorless control at medium and high speeds for permanent magnet synchronous motor (PMSM) and expand its applicability, this paper proposes a new scheme that uses a sliding mode observer and a frequency-locked loop ...
Liqun Huangfu, Cen Chen, Tao Zhang
doaj   +1 more source

Robust Band-Pass Filter-Based PLL-Less Approach for Three-Phase Nonsinusoidal Grid Conditions

IEEE Open Journal of Instrumentation and Measurement
The performance enhancement of an inverter-based grid-connected system necessitates a fast and accurate dynamic response in terms of estimating three-phase grid voltage attributes.
Manish Kumar, Anant Kumar Verma, Claudio Burgos-Mellado, Raj Kumar Jarial, Ravinder Nath, Bhumaiah Jula, Diego Munoz-Carpintero, Catalina Gonzalez-Castano, Pedro Roncero-Sanchez   +8 more
doaj   +1 more source

Combined effect of loop delay and reference clock jitter in first-order digital bang-bang phase-locked loops [PDF]

, 2009
Paper presented at the IEEE International Symposium on Circuits and Systems (ISCAS), Taipei, Taiwan, 24-27 May 2009Recently, several digital phase-locked loops (DPLLs) have been demonstrated to achieve the jitter performance of traditional charge-pump ...
Tertinek, Stefan, Orla Feely, Stefan Tertinek, Feely, Orla   +3 more
core   +1 more source

Fast virtual inertia support for AC-excitation synchronous condensers based on dual frequency-locked loops

International Journal of Electrical Power & Energy Systems
The increasing integration of inverter-based resources into modern power systems has substantially reduced the overall rotational inertia, posing critical challenges to grid frequency stability.
Xianfei Xie, Patrick J. Palanas, Tianqi Xie, Xi Chen, Kexun Yu   +4 more
doaj   +1 more source

Computing low-frequency noise in charge-pump phase-locked loops

, 2011
An efficient simulation method to compute the low-frequency noise spectrum found at the output of charge-pump phase-locked loops is described.
LEVANTINO, SALVATORE, MAFFEZZONI, PAOLO, S. Levantino, P. Maffezzoni   +3 more
core   +1 more source

Broadband suppression of phase-noise with cascaded phase-locked-loops for the generation of frequency ramps [PDF]

Advances in Radio Science, 2003
The generation of analogue frequency ramps with non-fractional phase-locked-loops (PLL) is a cost effective way of linearising varactor controlled oscillators (VCO).
T. Musch
doaj  

Three-frequency resonances in coupled phase-locked loops

, 2012
We construct an experimental model of a nonlinear dynamical system with three frequencies. With this analog electronic circuit made up of quasi-periodically forced coupled phase-locked loops, we investigate the structure of the scaling of three-frequency
Cartwright, Julyan H. E., González, Diego L., Calvo, Óscar, Piro, Oreste, Sportolari, F.   +4 more
core   +1 more source

Transfer function-based generalization of grid forming power synchronization loops

International Journal of Electrical Power & Energy Systems
With the increasing penetration of inverter-based resources, grid forming control is expected to play a key role in stabilizing future grids. In these controllers, the power synchronization loop is in charge of synchronizing the inverter to the grid ...
Ander Ordono, Javier Rodriguez-Gongora, Alain Sanchez-Ruiz, Markel Zubiaga, Francisco Javier Asensio, Jose Antonio Cortajarena   +5 more
doaj   +1 more source

Threshhold analysis of phase locked loops [PDF]

, 1969
Computer technique for predicting threshold in phased locked loops with and without frequency ...
Schilling, D. L., Osborne, P. W.
core