Results 121 to 130 of about 12,255 (285)

Leakage current and common mode voltage issues in modern AC drive systems

, 2007
Due to rapid developments of IGBT technology, switching time and frequency are dramatically increased. At higher carrier frequencies, IGBTs induce more capacitive coupled current into a rotor and a stator frame and lead to faster bearing damage.
Ghosh, A., Adabi Firouzjaee, Jafar, F. Zare, G. Ledwich, Adabi, J., Zare, F., Ghosh, Arindam, Zare, Firuz, Ledwich, Gerard F., J. Adabi, Ledwich, G., A. Ghosh   +11 more
core   +1 more source

A Worm‐Inspired Origami Robot with Multimodal Locomotion for Adaptive Mobility in Complex Pipeline Environments

Advanced Science, EarlyView.
An origami worm‐inspired robot achieves multimodal locomotion in confined pipelines through mechatronic integration that embeds actuation, control, and communication within each origami module. Large, reversible configuration and dimensional changes enable 25 gaits synthesized by a unified framework across peristaltic, inchworm, and wheel‐rolling modes
Qiwei Zhang, Kangning Tan, Zihan He, Hongsen Pang, Yanjie Wang, Hongbin Fang, Jian Xu   +6 more
wiley   +1 more source

Design and Validation of Segmented CFRP Lamella-Based Composite End Shield for Bearing Current Mitigation

Machines
This study addresses the premature failure of electric motor bearings caused by inverter-induced parasitic currents. We propose a novel segmented end shield design utilizing 24 carbon fiber-reinforced polymer (CFRP) lamellae to provide both structural ...
Jiří Sika, Michal Křížek, Tomáš Kavalír, Bohumil Skala   +3 more
doaj   +1 more source

Palatable‐Food–Driven Top‐Down Circuit Inhibits PVNCRF Activity to Mitigate Stress Via Peri‐PVNCRFR1 Neurons

Advanced Science, EarlyView.
Palatable food alleviates stress and prevents anxiety. This study uncovers a dedicated neural pathway: dopamine release in the PFC activates D1R neurons, whose projections to the peri‐PVN engage a population of anxiolytic CRFR1 neurons. These neurons then inhibit stress‐induced hyperactivity of PVNCRF neurons, providing a circuit‐level explanation for ...
Yuchuan Hong, Shirui Jun, Tianjiao Deng, Gaojie Shao, Dan Liu, Yi Sun, Yan Chen, Qian Xiao, Jie Shao, Sheng Wang, Tianwen Huang, Fan Yang, Jie Tu   +12 more
wiley   +1 more source

Studi Eksperimental Pengaruh Sudut Sudu pada Turbin Pelton terhadap Performa Pembangkit Listrik Tenaga Gelombang Air Mekanisme Piston

Rekayasa
Renewable energy is energy that comes from natural resources that are continuously available. Renewable energy will replace fossil fuels that will slowly run out, fossil fuels such as oil, gas and coal. Dependence on fossil fuels results in the depletion
Ach Dhaka' Fikri, Ardi Noerpamoengkas, Miftahul Ulum   +2 more
doaj   +1 more source

Calculation of Shaft Voltage and Bearing Current of Brushless DC Motor Driven by PWM Inverter

, 2005
This paper describes the calculated and measured waveforms of shaft voltage and bearing currents of the brushless DC motor driven by PWM inverter. At first, we discussed the current path of the bearing current when unloaded side bearing is conducting and

core  

Novel Structure of Shield Ring to Reduce Shaft Voltage and Improve Cooling Performance of Interior Permanent Magnet Synchronous Motor

The voltage of the battery system is increased to increase the efficiency of the electric motor drive system. Additionally, the space vector pulse width modulation (SVPWM) technique is used to ensure high controllability.
Jin Hur, Jun-Hyeok Heo, Su-Hwan Kim, Jun-Kyu Kang   +3 more
core   +1 more source

NLSS3 Impairs SHM1 Autophagic Degradation to Regulate Leaf Morphology and Salt Tolerance in Rice

Advanced Science, EarlyView.
In rice, NLSS3 binds and shields SHM1 from autophagic degradation to maintain serine homeostasis. The A132P mutation in nlss3 disrupts this, triggering SHM1 loss, metabolic dysfunction, K+ imbalance, and impaired ROS scavenging, which collectively drive narrow leaves and salt sensitivity.
Xiong Liu, Yulu Yang, Zhiqi Hao, Jing Xu, Huibo Zhao, Qiang Zhang, Deyong Ren, Xia Li, Guojun Dong, Lan Shen, Li Zhu, Jiang Hu, Zhenyu Gao, Qing Li, Qian Qian, Guangheng Zhang   +15 more
wiley   +1 more source

Shaft voltage calculations in a cage induction motor by the finite element method

, 2010
In the paper results of finite-element calculations of the shaft voltage in a squirrel-cage induction motor were presented. A two-dimensional field-circuit model of the 300 kW induction motor was developed taking into account supplying the stator winding
Boboń, A., Niestrój, R., Drak, B., Zientek, P.   +3 more
core  

An Energy Autonomous Microneedle Array‐Based Sensing System for Continuous Biomarker Monitoring

Advanced Science, EarlyView.
This work presents an innovative self‐powered wearable biosensor system for real‐time monitoring of multiple biomarkers in interstitial fluid. The device integrates stainless steel‐based minimally invasive microneedles with ion‐selective membranes, enabling simultaneous Na+, K+, Ca2+, pH, and glucose detection.
Arnab Pal, Kai‐Po Fan, Sheng‐Chun Hung, Jaba Roy Chowdhury, Jun‐Hsun Chung, Meenakshi Ray, Hsiang‐Yun Hsu, Fu‐Cheng Kao, Kuei‐Lin Liu, Zong‐Hong Lin   +9 more
wiley   +1 more source