Results 91 to 100 of about 1,737,791 (396)

Towards Long-endurance Flight: Design and Implementation of a Variable-pitch Gasoline-engine Quadrotor

, 2017
Majority of today's fixed-pitch, electric-power quadrotors have short flight endurance ($
Chen, B. M., Lin, F., Pang, T., Peng, K.
core   +1 more source

Three-phase modular permanent magnet brushless machine for torque boosting on a downsized ICE vehicle [PDF]

, 2005
The paper describes a relatively new topology of 3-phase permanent magnet (PM) brushless machine, which offers a number of significant advantages over conventional PM brushless machines for automotive applications, such as electrical torque boosting at ...
Howe, D., Wang, J.B., Xia, Z.P.
core   +1 more source

Artificial Symbiosis for Bulk Production of Bacterial Cellulose Composites

Advanced Materials, EarlyView.
Co‐cultivation of the cellulose‐producing bacterium with the microalga enables bulk formation of bacterial cellulose under static incubation, with photosynthetically active oxygen‐generating sites throughout the medium. This symbiotic platform supports 3D cellulosic constructs with geometries dictated by the vessel shape.
Kui Yu, Sing Teng Chua, Ran Zhao, Alyssa Smith, Michael Kühl, Alison G. Smith, Tom Ellis, Silvia Vignolini   +7 more
wiley   +1 more source

Investigation of the Vibration Effects on an Outer Rotor Brushless Direct Current Motor

IEEE Access
Light electric vehicles used as scooters, electric bikes, tricycles and mini cars are mostly preferred today, especially in urban transportation. Outer rotor Brushless Direct Current Motor (BLDCM) is frequently used in the powertrain of light electric ...
Ali Sinan Cabuk
doaj   +1 more source

Initial Rotor Position Detection for Brushless DC Motors Based on Coupling Injection of High-Frequency Signal

IEEE Access, 2019
In applications where motor inversion is forbidden, it is important to detect the initial rotor position of the motor. For this reason, based on coupling injection of high-frequency signal, a novel method of initial rotor position detection for brushless
Wei Chen, Shuhai Dong, Xinmin Li, Yanfei Cao, Guozheng Zhang   +4 more
doaj   +1 more source

Energy-efficient motors [PDF]

, 2008
The use of a copper-squirrel cage in induction motors has been analyzed testing a prototype rated 1.1 kW and comparing the performances with a twin machine with an aluminum cage. The comparison has been made using torque, efficiency, starting torque, and
Boglietti, Aldo, Cavagnino, Andrea, Ferraris, Luca, Lazzari, Mario   +3 more
core   +1 more source

Analysis of Torque Ripple and Cogging Torque Reduction in Electric Vehicle Traction Platform Applying Rotor Notched Design

Energies, 2018
Drive motors, which are used in the drive modules of electric cars, are interior permanent magnet motors. These motors tend to have high cogging torque and torque ripple, which leads to the generation of high vibration and noise.
Myeong-Hwan Hwang, Hae-Sol Lee, H. Cha
semanticscholar   +1 more source

COFs on MOFs: Layer‐by‐Layer Synthesis of MOF@COF Nanoparticles with Synergistic Adsorption

Advanced Materials, EarlyView.
A layer‐by‐layer strategy enables the growth of crystalline covalent organic framework (COF) shells on metal–organic framework nanoparticles, creating core–shell structures with tunable porosity. Ordered interstitial mesopores are formed during shell growth, which are connected with the COF's intrinsic micropores, thereby enhancing water sorption. This
Ana Guillem‐Navajas, Lucía Torrico‐García‐Viso, Jose Antonio Suárez del Pino, Nekane Aramburu‐Merino, Pilar Segovia, Enrique G. Michel, Josep Puigmartí‐Luis, Enrique Velasco, Pedro Tarazona, Daniel Maspoch, David Rodríguez‐San‐Miguel, Félix Zamora   +11 more
wiley   +1 more source

ISO efficiency curves of a two-phase hybrid stepping motor [PDF]

, 2010
Stepping motors are used in numerous applications because of their low manufacturing cost and simple speed control. It is well known that their energetic efficiency is low but actual values are typically not available.
Cottyn, Johannes, Cox, Peter, De Belie, Frederik, Derammelaere, Stijn, Stockman, Kurt, Van den Abeele, Griet, Vandevelde, Lieven, Vanwalleghem, Bart, Vervisch, Bram   +8 more
core   +1 more source

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 more
wiley   +1 more source