Results 61 to 70 of about 484 (203)

Direct Evidence of Topological Dirac Fermions in a Low Carrier Density Correlated 5d Oxide

Advanced Functional Materials, Volume 36, Issue 13, 12 February 2026.
The 5d oxide BiRe2O6 is discovered as a low‐carrier‐density topological semimetal hosting symmetry‐protected Dirac fermions stabilized by nonsymmorphic symmetries. Angle‐resolved photoemission spectroscopy, quantum oscillations, and magnetotransport measurements reveal gapless Dirac cones, quasi‐2D Fermi surfaces, high carrier mobility, and a field ...
Premakumar Yanda, Jorge Cardenas‐Gamboa, Ding Pei, François Bertran, Leila Noohinejad, Snehashish Chatterjee, Changjiang Yi, Iñigo Robredo, Horst Borrmann, Maia G. Vergniory, Chandra Shekhar, Claudia Felser   +11 more
wiley   +1 more source

Effective Torque Ripple Reduction of Permanent Magnet Brushless DC Motor

, 2022
To reduce commutation torque ripple, a model predictive control (MPC) for permanent brushless DC motors (BLDCM) is presented (CTR). Torque ripples cause vibration noise and decrease efficiency.
Krori Dutta, Kusumika, Mrs, Nemagoud, Vishwanath S, Mr.   +1 more
core   +1 more source

Torque Ripple Suppression of BLDCM With Optimal Duty Cycle and Switch State by FCS-MPC

IEEE Open Journal of Power Electronics
The traditional six-step commutation control method in brushless DC motors (BLDCM) often results in significant torque ripple, which limits its application in high-precision fields.
Zicheng Li, Xiuwei Fan, Qingyao Kong, Jiang Liu, Sai Zhang   +4 more
doaj   +1 more source

Commutation Torque Ripple Suppression in Three Phase Brushless DC Motor Using Open-end Winding

, 2021
Three phase brushless DC motor has the characteristics of high power density, simple structure and excellent speed regulation performance, which is widely used in the field of electric drive.
Huang, Qi, Cao, Jichao, Zhang Y(张远), Luo L(罗玲)   +3 more
core  

A general approach to the linear stability of viscoelastic shear‐flows

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Volume 106, Issue 2, February 2026.
Abstract The present work provides an in‐depth analysis of the linear stability theory of viscoelastic shear‐flows, based upon a constitutive equation of the fading memory type. The particular model considered herein was introduced by Kenneth Walters through the integration of classical rate‐type fluids in a convected frame (Walters 1962).
Johannes Conrad, Martin Oberlack
wiley   +1 more source

Quantum GraviElectro Dynamics

Annalen der Physik, Volume 538, Issue 1, January 2026.
The BRST invariant Lagrangian of the gravitationally interacting U(1)$U(1)$ gauge theory, namely the Quantum GraviElectro Dynamics (QGED). The Yan–Mills theory with the Hilbert–Einstein gravitational Lagrangian, namely the Yang–Mills–Utiyama (YMU) theory, is defined and quantised using the standard procedure. The theory is perturbatively renormalisable,
Yoshimasa Kurihara
wiley   +1 more source

Predictive Control of Brushless DC Motor Drive Providing Minimum Joule Losses and Torque Ripple Free Commutation

, 2011
A novel modulation technique suitable for the current control of brushless DC drives under commutation is presented in the paper. The pulse width of the chain voltages are determined by means of a predictive algorithm under the constraints of minimum ...
A. Serpi, I. Marongiu, PERFETTO, ALDO, MEO, SANTOLO, G. Gatto   +4 more
core   +1 more source

A Novel Hybrid Robust Transfer Learning‐Based Adaptive Fractional‐Order Super‐Twisting Sliding Mode Controller Enhanced for Speed Regulation of Brushless DC Motor

IET Control Theory &Applications, Volume 20, Issue 1, January/December 2026.
The incorporation of fractional‐order (FO) dynamics adds flexibility, noise resilience and adaptability but FO controllers are still based on offline gain tuning and can't be used in practice. In order to overcome all these challenges, a novel transfer learning‐based fractional‐order super‐twisting sliding mode controller (TL‐FO‐ST‐SMC) is proposed in ...
SeyyedMorteza Ghamari, Asma Aziz, Daryoush Habibi   +2 more
wiley   +1 more source

OCTSF for torque ripple minimisation in SRMs

, 2016
In this study, a new online compensation of torque sharing function (OCTSF) method is proposed to minimise the torque ripple in switched reluctance motors (SRMs).
Si, J, Sun, Q, Hu, Y, Wu, J, Gan, C
core   +1 more source

Reduction of Torque Ripple in Permanent Magnet Synchronous Motors for Electric Vehicles Using Enhanced Dwarf Mongoose Optimisation and a Supervised Attention‐Based Multi‐Scale Temporal Convolutional Network

IET Electric Power Applications, Volume 20, Issue 1, January/December 2026.
In this paper, a new hybrid method named IDMO‐SAMTCN is introduced to reduce torque ripple in Permanent Magnet Synchronous Motors (PMSMs) used in electric vehicles. The method merges an Improved Dwarf Mongoose Optimisation algorithm for tuning PI controller parameters with a Supervised Attention‐based Multi‐scale Temporal Convolutional Network for ...
Vidyalakshmi Ravichandran, Manoharan Subramanium, Isaac JoshuaRamesh Lalvani Joshua Stephen Chellakumar   +2 more
wiley   +1 more source