Results 51 to 60 of about 484 (203)

An Incorporated Control Strategy of Commutation and Conduction Torque Ripples Mitigation for BLDCM Drives in Household Appliances

IEEE Access, 2019
In this paper, an incorporated control strategy of both commutation and conduction torque ripples mitigation for brushless DC machine (BLDCM) with the sinusoidal back electromotive force(EMF) is proposed to reduce the vibration and noise of household ...
Jiadan Wei, Peng Liu, Wenjie Tao
doaj   +1 more source

High resolution data reveal fundamental steps and turns in animal movements

Ecological Monographs, Volume 96, Issue 2, May 2026.
Abstract Animal movement paths display substantial complexity and variability, promoting efforts to identify universal rules and models that best describe them. Using high‐resolution (≥10 Hz) movement from 43 vertebrate species spanning diverse taxa, body sizes, and lifestyles, we show that paths are universally composed of straight‐line steps ...
Richard M. Gunner, Rory P. Wilson, Miguel Lurgi, Luca Börger, James Redcliffe, Emily L. C. Shepard, Mark D. Holton, Margaret C. Crofoot, Abdulaziz Alagaili, Samantha Andrzejaczek, Daniel Ariano‐Sánchez, Thomas Barbedette‐Gerard, Nigel C. Bennett, Alice Bernard, Rowan Brown, Nik Cole, Scott Creel, Ariovaldo P. Cruz‐Neto, Agustina di Virgilio, Carlos M. Duarte, Christophe Eizaguirre, Kyle H. Elliott, Monika Faltusova, Mathieu Garel, Natasha Gillies, Adrian C. Gleiss, Aoife Göppert, David Grémillet, Sophie de Grissac, Tim Guilford, Maxime Hoareau, Mark Jessopp, Agustina Gómez‐Laich, Milos Jezek, Sergio A. Lambertucci, Pascal Marchand, Nikki Marks, Andréia Martins, Mark Meekan, Yuichi Mizutani, Rasmus M. Mortensen, Bradley M. Norman, Josue Ortega, Oliver Padget, Michael Painter, Aurore Ponchon, Pascal Provost, Aurélien Prudor, Flavio Quintana, Stefanie Reinhardt, Samantha D. Reynolds, Frank Rosell, Carlos R. Ruiz‐Miranda, Peter G. Ryan, David M. Scantlebury, Stefan Schoombie, Rebecca Scott, Vaclav Silovsky, Jeroen Steenbeek, Vikash Tatayah, Carole Toïgo, Lucia Torrez, Fred Tremblay, Joshua P. Twining, Ken Yoda, Henri Weimerskirch, Shannon Whelan, Juan M. Morales, Jonathan R. Potts   +68 more
wiley   +1 more source

Average torque distribution strategy for low speed operation of three-phase SRM with low-resolution rotor position sensor

Alexandria Engineering Journal, 2023
An average torque distribution (ATD) strategy for low-speed operation of three-phase switched reluctance motor (SRM) with hall-effect rotor position sensor, as well as a calibration method for the sensor, are proposed.
Shiqi Shen, Hui Wang, Mengqiu Li, Yaojing Feng, Yichang Zhong   +4 more
doaj   +1 more source

Manifestly unitary higher Hilbert spaces

Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.
Abstract Higher idempotent completion gives a formal inductive construction of the n$n$‐category of finite‐dimensional n$n$‐vector spaces starting with the complex numbers. We propose a manifestly unitary construction of low‐dimensional higher Hilbert spaces, formally constructing the C∗$\mathrm{C}^*$‐3‐category of 3‐Hilbert spaces from Baez's 2 ...
Quan Chen, Giovanni Ferrer, Brett Hungar, David Penneys, Sean Sanford   +4 more
wiley   +1 more source

Torque ripple reduction of switched reluctance motor using direct instantaneous torque control and adaptive turn‐on technique for electric vehicle applications

IET Electric Power Applications, 2023
Direct Instantaneous Torque Control (DITC) with an adaptive turn‐on angle technique is presented in this paper to improve the torque ripple of the Switched Reluctance Motor (SRM) for Electric Vehicle applications. Torque ripple suppression is achieved by
Laith Al Quraan, Laszlo Szamel
doaj   +1 more source

Lorentzian homogeneous structures with indecomposable holonomy

Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.
Abstract For a Lorentzian homogeneous space, we study how algebraic conditions on the isotropy group affect the geometry and curvature of the homogeneous space. More specifically, we prove that a Lorentzian locally homogeneous space is locally isometric to a plane wave if it admits an Ambrose–Singer connection with indecomposable, non‐irreducible ...
Steven Greenwood, Thomas Leistner
wiley   +1 more source

Performance Analysis of Buck-Boost and SEPIC Converter for Commutation Torque Ripple Minimization in BLDC Motors

, 2022
This paper discusses comparative analysis of Buck-Boost and SEPIC (Single Ended Primary Inductance) converters used in DC link voltage control technique to reduce torque ripple in Brushless Direct Current Motors (BLDCM). The aim of this study is to prove
Kahveci, Hakan, Corapsiz, Muhammed Resit
core   +1 more source

Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the String‐Theoretical Swampland Programme

Fortschritte der Physik, Volume 74, Issue 4, April 2026.
Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley   +1 more source

Performance improvement based on adaptive commutation strategy for switched reluctance motors using direct torque control

Alexandria Engineering Journal, 2022
This research presents an improved direct instantaneous torque controller (DITC) for switched reluctance motors (SRMs). It incorporates a novel adaptive real-time commutation mechanism.
Fahad Al-Amyal, Mahmoud Hamouda, László Számel   +2 more
doaj   +1 more source

A Re‐Examination of Foundational Elements of Cosmology

Fortschritte der Physik, Volume 74, Issue 3, March 2026.
ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley   +1 more source