Results 21 to 30 of about 1,557,809 (346)

Fluid flow measurement in rotor ventilation ducts

open access: yesThe Journal of Engineering, 2019
Engineers are constantly developing different ways to cool electrical machines more efficiently. Ventilation ducts/channels are common in the stators of large electrical machines.
Christopher Micallef   +2 more
doaj   +1 more source

Eccentricity Parameters Identification for a Motorized Spindle System Based on Improved Maximum Likelihood Method

open access: yesShock and Vibration, 2020
As a kind of rotor system, the electric spindle system is the core component of the precision grinding machine. The vibration caused by the mass imbalance is the main factor that causes the vibration of the grinding machine.
Wengui Mao   +4 more
doaj   +1 more source

Performance of multi-stage axial-flux machines with MMEs

open access: yesThe Journal of Engineering, 2019
This study covers the investigation into the reduction of rare-earth magnets in a permanent magnet (PM) machine via the use of multiple rotors to enable a PM generator to be comprised of mixed magnetic elements, hereafter referred to as MME, by ...
Anthony James Spargo
doaj   +1 more source

Generalized Symmetries for Generalized Gravitons

open access: yesPhysical Review Letters, 2023
Construimos simetrías generalizadas para la gravedad de Einstein linealizada en dimensiones arbitrarias. Las consideraciones de primer principio en la teoría cuántica de campos obligan a que las simetrías generalizadas aparezcan en pares duales. Verificar esta predicción nos ayuda a encontrar el conjunto completo de cargas conservadas no triviales ...
Valentín Benedetti   +2 more
openaire   +4 more sources

Thermally Tunable Orbital Angular Momentum Mode Generator Based on Dual-Core Photonic Crystal Fibers

open access: yesNanomaterials, 2021
The combination of mode division multiplexing (MDM) based on orbital angular momentum (OAM) modes with wavelength division multiplexing (WDM) has attracted considerable attention due to its ability to increase optical transmission capacity.
Lianzhen Zhang   +6 more
doaj   +1 more source

Research and calculation of magnetic system of built-in axle-box generators of freight cars [PDF]

open access: yesОмский научный вестник, 2020
The article deals with the issues of providing communication, as well as diagnostics and telemetry of freight cars. The growth of rail traffic is currently placing increased demands on the levels of safety, automation and an increase in the average ...
O. A. Lysenko   +2 more
doaj   +1 more source

Design and experimental characterization of a tunable vibration-based electromagnetic micro-generator [PDF]

open access: yes, 2010
Vibration-based micro-generators, as an alternative source of energy, have become increasingly significant in the last decade. This paper presents a new tunable electromagnetic vibration-based micro-generator.
Akoun   +19 more
core   +1 more source

A micro electromagnetic generator for vibration energy harvesting [PDF]

open access: yes, 2007
Vibration energy harvesting is receiving a considerable amount of interest as a means for powering wireless sensor nodes. This paper presents a small (component volume 0.1 cm3, practical volume 0.15 cm3) electromagnetic generator utilizing discrete ...
  +17 more
core   +1 more source

Global Exponential Synchronization of Nonlinearly Coupled Complex Dynamical Networks with Time-Varying Coupling Delays

open access: yesComplexity, 2017
This paper focuses on the global exponential synchronization problem of nonlinearly coupled complex dynamical networks with time-varying coupling delays.
Yi-Ping Luo, Li Shu, Bi-Feng Zhou
doaj   +1 more source

SPEED BREAKER SEBAGAI PENGGERAK GENERATOR LISTRIK

open access: yesJournal of Renewable Energy and Mechanics, 2020
The kinetic energy was produced by a moving vehicle can be used to generate power by using a speed breaker.  The kinetic energy is converted into mechanical energy by altering a reciprocating connecting rod into rotation of flywheel, then it is ...
Zainuri Anwar, Eddy Elfiano
doaj   +1 more source

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