Results 81 to 90 of about 391,421 (293)

Torque Ripple Minimization of PM-assisted Synchronous Reluctance Machines via Asymmetric Rotor Poles [PDF]

, 2019
Torque ripple minimization is one of the design challenges of PM-assisted Synchronous Reluctance (PM-SyR) machines. Very often, time-consuming FEA based optimization is the preferred design strategy.
Simone Ferrari, Gianmario Pellegrino, Eric Armando   +2 more
core   +1 more source

Parameter Investigation for Stamp Manufacturing of Complex 3D Geometries Using Nanoimprint Lithography

Advanced Materials Technologies, EarlyView.
Nanoimprint lithography can replicate complex 3D microstructures with undercuts using single‐layer polymer stamps of different elasticities. By combining experiments and simulations, T‐shaped geometries and suitable undercut radii were identified that minimize stress and defects during demolding.
Christos Julianos Karapatzakis, Selina Burkert, Cordelia Friederike Wittemann, Andreas Heinrich   +3 more
wiley   +1 more source

Cogging Torque Minimization Strategies in Interior Permanent Magnet Synchronous Motors

IEEE Access
Cogging torque in interior permanent magnet synchronous motors (IPMSMs) is caused by variation in magnetic reluctance between permanent magnets and stator slot openings.
Milad Bahrami-Fard, Jingchen Liang, Pengyuan Chen, Colbey Hair, Mehdi Moallem, Steven Pekarek, Babak Fahimi   +6 more
doaj   +1 more source

Torque Ripple Reduction and Flux-Droop Minimization of DTC With Improved Interleaving CSFTC of IM Fed by Three-Level NPC Inverter

IEEE Access, 2019
Direct torque control (DTC) is known for its fast control in AC motor drives due to its simple control structure that directly controls the torque without the need for modulation blocks or frame transformations. However, when used in induction motor (IM)
Samer Saleh Hakami, Ibrahim Mohd Alsofyani, Kyo-Beum Lee   +2 more
doaj   +1 more source

Dynamic Fluorescence Modulation via Light‐Driven Competitive Protonation

Advanced Optical Materials, EarlyView.
A two‐component molecular system demonstrates reversible, light‐driven fluorescence write–erase cycling and thermal imaging. Illumination of a merocyanine photoacid transfers a proton to a highly efficient fluorescent pyridinium dye, switching its emission color; thermal relaxation reverses the process in the dark.
Serena X. Liu, Moritz E. Kleybolte, Colin van Dyck, Sergey I. Vagin, Preeti Gahtori, Antonio Scarpati, Razieh Firouzihaji, Diogo A. Galico, Ulrich S. Schubert, Julianne Gibbs, Alkiviathes Meldrum   +10 more
wiley   +1 more source

Assessment of torque ripple minimization techniques for aircraft switched reluctance machine starter/generator [PDF]

, 2017
This paper presents an assessment of different torque ripple minimization techniques for more electric aircraft Switched Reluctance Machine (SRM) starter/generator (S/G). SRM is one of the most popular potential candidates for future aircraft S/G. SRM is
Bozhko, Serhiy, Rashed, Mohamed, Ding, Xiaofeng   +2 more
core  

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

Direct Flux-and-Torque Vector Control with Active Torque Ripple Minimization

2024 IEEE Applied Power Electronics Conference and Exposition (APEC)
The paper presents a simple and effective direct flux and torque control strategy for the active minimization of torque ripple in Permanent Magnet synchronous motor drives. The observed stator flux amplitude and the estimated electromagnetic torque are directly controlled, and the torque feedback is estimated through a pre-determined 3D Look-UpTable ...
Bojoi, Andrei, Pescetto, Paolo, Stella, Fausto, Ferrari, Simone, Pellegrino, Gianmario   +4 more
openaire   +2 more sources

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Design of low-torque-ripple synchronous reluctance motors

, 1997
A design approach oriented to minimization of torque-ripple is presented, for synchronous reluctance motors of the transverse-laminated type. First, the possible types of rotors are classified and the more suited rotor structure is evidenced, to be ...
PETRACHE C., Pastorelli, Michele Angelo, PASTORELLI M, Petrache, C., Vagati, A., VAGATI A, Franceschini, G., A. Vagati, Vagati, Alfredo, C. Petrache, FRANCESCHINI, Giovanni, Pastorelli, M., M. Pastorelli, G. Franceschini, FRANCESCHINI G   +14 more
core   +1 more source