Results 31 to 40 of about 179,335 (194)
Brainless Walking: Animal Gaits Emerge From an Actuator Characteristic
Frontiers in Robotics and AI, 2021 In this study, we discovered a phenomenon in which a quadruped robot without any sensors or microprocessor can autonomously generate the various gait patterns of animals using actuator characteristics and select the gaits according to the speed.
Yoichi Masuda +3 more
doaj +1 more source
Advanced Diagnostic Techniques for Earthing Brush Faults Detection in Large Turbine Generators
EnergiesLarge steam turbine generators are increasingly vulnerable to damage from shaft voltages and bearing currents due to the widespread adoption of modern power electronic excitation systems and more flexible operating regimes.
Katudi Oupa Mailula, Akshay Kumar Saha
doaj +1 more source
Sensorless MRAS control of emerging doubly‐fed reluctance wind generators
IET Renewable Power Generation, 2021 A new model reference adaptive system based estimation technique for vector control of real and reactive power of a brushless doubly fed reluctance generator without a shaft position sensor is proposed.
Mohammad‐Reza Agha‐Kashkooli +1 more
doaj +1 more source
Research on the Accumulative Damage of Flywheels Due to In-Space Charging Effects
AerospaceHigh-speed rotating flywheel bearings, designed for space applications, generate a high-resistance hydrodynamic lubrication film, which isolates the rotor, transforming it into a conductor. This phenomenon introduces a novel failure mode—flywheel bearing
Dong Tian +6 more
doaj +1 more source
MachinesFast-switching transients and high dv/dt associated with PWM inverters exacerbate the reflected-wave effects in the motor feeder cable. This leads to higher motor-side overvoltages, which increase the stress on the motor winding insulation, potentially ...
Fawzy A. Abdo +3 more
doaj +1 more source
Elektrotehnìka ta Elektroenergetika, 2018 Purpose. Investigation of the influence of sharply variable electric load on non-stationary electromagnetic phenomena and electromechanical processes in a synchronous electric drive. Methodology.
V. V. Zinovkin +2 more
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International Journal of Mechanical System Dynamics, 2021 This study aims to show an approach for the dynamic simulation of a synchronous machine. The magnetic forces in the air gap are calculated efficiently using simplified approaches without neglecting important effects.
Florian Bechler +5 more
doaj +1 more source
Suppression of common-mode voltage in a PWM rectifier/inverter system [PDF]
, 2001 This paper proposes a PWM rectifier/inverter system capable of suppressing not only supply harmonic currents but also electromagnetic interference (EMI).
S. Ogasawara +3 more
core +1 more source
Experimental Study: Bearing Degradation Caused by Electrical Currents and Voltages at Low Speeds
LubricantsIn electric vehicles (EVs), bearings in traction motors are increasingly prone to electrical damage under operational currents and voltages, leading to accelerated wear and reduced lifespan.
Zifan Li, Ran Cai, Xueyuan Nie
doaj +1 more source
Membrane composition and thermodynamic identity as boundaries of life for synthetic cell research
FEBS Letters, EarlyView.What makes a cell a cell? The boundary of a living cell is not just a wall. Read as a Markov blanket, the membrane separates internal from external states, generating identity and non‐equilibrium order. Can this identity be rebuilt from scratch in a synthetic cell?
Caterina Presutti, Bert Poolman
wiley +1 more source