Results 91 to 100 of about 12,904,917 (277)

MTPA Control Strategy for Brushless DC Motors Based on Zero-Sequence Current Injection

Machines
Under ideal trapezoidal back electromotive force (EMF) conditions, a brushless direct current (BLDC) motor can produce constant instantaneous electromagnetic torque when supplied with ideal three-phase square-wave currents.
Tianpeng Zheng, Zhongming Xiong, Zhihao Yuan, Zhenguo Li   +3 more
doaj   +1 more source

Stochastic Entanglement of Deterministic Origami Tentacles For Robust Robotic Grasping

Advanced Science, EarlyView.
This study introduces an origami tentacle gripper to robustly grasp objects‐in air, underwater, and even in orbital space‐by exploiting a synergy between local, deterministic deformation programming and global, stochastic entanglements. A single origami tentacle can be designed to coil with a simple tendon pull.
Alec Boron, Bokun Zheng, Ziyang Zhou, Noel Naughton, Suyi Li   +4 more
wiley   +1 more source

DITC control strategy for semi-direct drive system with switched reluctance motor in coal mine belt conveyor

Gong-kuang zidonghua
The underground belt conveyor at Pingdingshan Tian'an Coal Mining No. 9 Co., Ltd. uses a drive system consisting of an asynchronous motor, hydraulic coupling, and reduction gears.
LIU Peng, ZHANG Lei, BAO Jiusheng, CHEN Huaxin, WEI Chunji, MA Chuanming, WANG Lei, WANG Xiaolong   +7 more
doaj   +1 more source

A general magnetic-energy-based torque estimator: validation via a permanent-magnet motor drive [PDF]

, 2008
This paper describes the use of the current–flux-linkage ($i{-}psi$ ) diagram to validate the performance of a general magnetic-energy-based torque estimator.
McGilp, M.I., Miller, T.J.E., Cossar, C., McGilp, M., Olaru, M., Popescu, M.   +5 more
core   +1 more source

Imperfect Oriented Attachment of Gold Nanoparticles

Advanced Science, EarlyView.
The cover illustrates the imperfect oriented attachment of gold nanoparticles in liquid, as revealed by in situ liquid‐phase transmission electron microscopy. Triggered by the abrupt collapse of the interfacial hydration layer, two misoriented nanoparticles undergo a kinetically driven “jump‐to‐coalescence”.
Fangjie Meng, Peng Hu, Yongzhao Zhang, Gengshuo Zhang, Jiaqi Zhang, Ronghan Wei, Wen Wang, Shaobo Cheng   +7 more
wiley   +1 more source

A Magnetic‐Driven Self‐Rotation‐Stabilized Miniature Swimming Robot

Advanced Science, EarlyView.
Inspired by the stable rotational descent of seeds in nature, this study designs a magnetic‐driven self‐rotation‐stabilized miniature swimming robot (MSMSR). Based on a resonance‐driven strategy, the robot exhibits high swimming performance, offering enhanced directional swimming and improved resistance to water flow disturbances compared to existing ...
Fujun Wang, Chuhan Zhang, Hao Zhang, Yanling Tian, Cunman Liang   +4 more
wiley   +1 more source

Role of direct torque control induction motor drives in MEMS

, 2006
Direct torque control of three phase induction motor (IM) is an outstanding method and also the state-of-art based on instantaneous space vector theory. It is highly commercialized which reflects that it has many advantages over DC commutator motors and ...
THAKURA P, THAKUR A, KARAN B, BUJA, GIUSEPPE, P.R. Thakura, A.N. Thakur, B.M. Karan, G.S. Buja   +7 more
core   +1 more source

A Preclinical Multifunctional Capsule Robot with Unified Diagnosis and Targeted Thermal Therapy for Gastrointestinal Diseases

Advanced Science, EarlyView.
A proof‐of‐concept multifunctional capsule robot integrates diagnostic imaging, magnetic navigation, wireless power transfer, and targeted thermotherapy for gastrointestinal applications. Magnetically guided positioning and stable wireless power enable localized thermal ablation, achieving controlled heating and high cell mortality in vitro.
Heng Zhang, Yichong Sun, Xiaoting Zhang, Chi‐Kwan Lee, Zheng Li, Yehui Li, Huarong Chen, Paul D. Mitcheson   +7 more
wiley   +1 more source

Amphibious Movement of Microrobots Inspired by Water Spiders

Advanced Science, EarlyView.
Inspired by the water strider, a novel microrobot is designed to maintain amphibious mobility in complex environments. It retains the ability to traverse the air‐liquid interface and perform directional movement within sophisticated, multifaceted environments, including complex gastric wall structures, with precise controllability.
Xiao Hu, Run Ouyang, Zhuhao Shi, Wanqiong Tao, Zuchao Zhu, Peifeng Lin, Jianzhong Lin, Luca Brandt   +7 more
wiley   +1 more source

Design and Implementation of a High-Precision Position Controller for Permanent Magnet Synchronous Motor Based on a New Gain Scheduling Approach

Iranian Journal of Electrical and Electronic Engineering, 2021
The direct drive permanent magnet synchronous motor (DD-PMSM) is a suitable choice for high-precision position control applications. Among various control methods of this motor, the vector control approaches especially the field oriented control has a ...
S. H. Montazeri, A. Damaki Aliabad, F. Zare, S. Aghaei   +3 more
doaj