Results 1 to 10 of about 37,428 (202)

The effect of end windings and the bearing labyrinth seals on stray capacitances and bearing voltage ratio of AC motors

IET Electric Power Applications, 2022
The bearing voltage brings premature failure of the motor bearings in the subway traction system, which is related to the stray capacitance of the motor.
Ruifang Liu, Qinqin Wang, Danan Sun, Xiaoji Huai   +3 more
doaj   +4 more sources

A Gear-Driven Plantar Energy Harvester with Integrated Self-Sensing for Human Locomotion Recognition [PDF]

Sensors
Wearable electronic systems require compact and sustainable power sources together with reliable motion-sensing functions. This study presents a gear-driven plantar energy harvester that integrates biomechanical energy conversion with self-sensing ...
Xinrui Wang, Weiqi Lin, Wenda Wang, Yang Yu, Moyue Cong, Yongzhuo Gao, Wei Dong   +6 more
doaj   +2 more sources

A Zynq-Based Triaxial Vibration Sensing Station with GPS-Disciplined Timing [PDF]

Sensors
Deep drilling equipment operates under high-load, strong-vibration, intermittent-impact, and variable environmental conditions, which motivate sensing systems that provide low-noise acquisition, synchronized triaxial measurements, local data integrity ...
Xiyuan Zhang, Yongqing Wang, Qisheng Zhang, Mingwei Qi, Jinhang Zhang, Jingwen Zhang, Xiaochang Liu   +6 more
doaj   +2 more sources

Magnetically Repulsive Cushion Triboelectric Nanogenerator for Rotating Machinery Structural Health Monitoring [PDF]

Sensors
Rotor imbalance and abnormal vibration are classical operating conditions in rotating machinery and can often be identified by conventional vibration analysis.
Haojie Peng, Yufen Wu, Yanling Li, Yingjie He, Changke Wang, Xin Na, Qiang Tan, Wei Qiu, Xiaohong Yang   +8 more
doaj   +2 more sources

Suppression of Rotor-Grounding Bearing Currents Based on Matching Stator and Rotor Grounding Impedances

Energies, 2022
Pulse-width modulation (PWM) inverter drive systems are widely applied in industry for their great speed-control characteristics and performance. However, the common-mode voltage of the inverter induces motor bearing voltage and bearing current, which ...
Lei Yang, Ying Yang, Junfu Wen, Lei Jia, Erle Yang, Ruifang Liu   +5 more
doaj   +1 more source

Simulation of the Circulating Bearing Currents for Different Stator Designs of Electric Traction Machines

Machines, 2023
Pulse–width modulated inverters are commonly used to control electrical drives, generating a common mode voltage and current with high–frequency components that excite the parasitic capacitances within electric machines, such as permanent magnet ...
Yusa Tombul, Philipp Tillmann, Jakob Andert   +2 more
doaj   +1 more source

Application of Perovskite Layer to Rotor for Enhanced Stator-Rotor Capacitance for PMSM Shaft Voltage Reduction

Energies, 2020
Adjustable speed drives use Pulse Width Modulation (PWM) to switch DC-bus voltage for the synthesis of three-phase voltages to provide power to the permanent magnet synchronous motor (PMSM).
Muhammad Aqil, Jun-Hyuk Im, Jin Hur
doaj   +1 more source

Experimental and numerical study on the stable bearing capacity of steel tubular cross bracing of a transmission tower

Case Studies in Construction Materials, 2022
Taking the 1000 kV ultra-high voltage (UHV) steel tube transmission tower as the engineering research subject, the ultimate bearing capacity of the X-cross bracing was experimentally studied.
Guan-Yuan Zhao, Wei Liu, Li Zhu, Jia-Huan Li, Xiao-Bin Gao   +4 more
doaj   +1 more source

Lubrication Condition Monitoring in EHD Line Contacts of Thrust Needle Roller Bearing Using the Electrical Impedance Method

Lubricants, 2023
In this study, we developed the electrical impedance method which simultaneously measures the thickness and breakdown ratio of oil films in elastohydrodynamic (EHD) line contacts within thrust needle roller bearings.
Taisuke Maruyama, Faidhi Radzi, Tsutomu Sato, Shunsuke Iwase, Masayuki Maeda, Ken Nakano   +5 more
doaj   +1 more source

Research on suppression effectiveness of compressed air foam for oil-immersed transformer hot oil fire

Case Studies in Thermal Engineering, 2023
Transformers, being the largest oil-bearing equipment, are susceptible to high-temperature hot oil fires and large-area flowing fires that can be challenging to extinguish.
Biao Zhou, Wanyu Yang, Hideki Yoshioka, Tao Chen, Kai Wang, Danping Hao, Chenyang Jiang, Kai Cui   +7 more
doaj   +1 more source