Results 21 to 30 of about 817,771 (190)

Analysis of the Shaft Resistance of Nondisplacement Piles in Sand [PDF]

, 2008
The paper examines, using numerical modelling, the problem of the limit shaft resistance of non-displacement piles installed in sands. The modelling makes use of an advanced, two-surface-plasticity constitutive model.
Loukidis, D, Salgado, Rodrigo
core   +1 more source

Online Evaluation of Turbo-Generator Shaft Fatigue Damage Caused by Subsynchronous Oscillation

IEEE Access, 2020
Subsynchronous oscillation (SSO) fault can cause torsional vibration and fatigue damage of the shafting system, thereby endanger the safe operation of the turbo-generator set.
Dongchao Chen, Yuhao Zhang, Yujiong Gu
doaj   +1 more source

Electrical bearing failures in electric vehicles

Friction, 2020
In modern electric equipment, especially electric vehicles, inverter control systems can lead to complex shaft voltages and bearing currents. Within an electric motor, many parts have electrical failure problems, and among which bearings are the most ...
Feng He, Guoxin Xie, Jianbin Luo
doaj   +1 more source

Investigation on Centrifugal Pump Shaft: A Comparison Study of the SME and the Imported Product [PDF]

, 2012
The implementation of the ASEAN-China Free Trade Agreement (ACFTA) forces the small and medium enterprises to have a high competition between the manufacturer from China and the ASEAN member countries.
S, Sugiyanto, J, Jamari, Mohammad , Tauviqirrahman, Rifky , Ismail   +3 more
core   +1 more source

Shaft Voltage Mechanism of AFPM Motors: Novel Parasitic Capacitance Derivation and Equivalent Circuit Modeling

IEEE Access
Space Vector Pulse Width Modulation (SVPWM) is widely utilized in modern motor drive systems due to its superior DC-link voltage utilization, reduced harmonic distortion, and lower torque ripple compared to conventional sinusoidal PWM methods.
Byoung-Wook Jo, Dae-Hyeon Kim, Jin Hur
doaj   +1 more source

Research on Traction Motor Bearing Electric Erosion of Metro Vehicle and Its Improvement Measures

机车电传动, 2021
In order to effectively solve the problem of electric erosion of traction motor bearing, from the source of shaft voltage,the cause of common mode voltage was studied, and the parasitic capacitance of motor was analyzed.
Zhixiao LUO
doaj  

Nonlinear dynamics of a rotating shaft with a breathing crack [PDF]

, 2011
In this paper, the effects of a breathing crack on the vibratory characteris- tics of a rotating shaft are investigated. A new, simple and robust model composed of two rigid bars connected with a nonlinear flexural spring is proposed.
Saber El Arem, EL AREM, Saber, NGUYEN, Quoc Son, Quoc Son Nguyen   +3 more
core   +1 more source

Verification of Shaft Voltage Reduction Effect Using Layered-Shield in EV Traction Motors

IEEE Access
Shaft voltage generated in electric vehicle (EV) motors is a critical issue as it can lead to motor performance degradation and damage, potentially resulting in vehicle fault and endangering the driver’s safety.
Jun-Hyeok Heo, Jun-Kyu Kang, Jin Hur
doaj   +1 more source

Enhancing Shaft Voltage Mitigation with Diffusion Models: A Comprehensive Review for Industrial Electric Motors

Energies
Industrial electric motors powered by variable frequency drives (VFDs) offer better controllability as compared to the conventional sinusoid-fed motors. However, the switching transients of VFDs induce shaft voltage in electric motors, which can lead to ...
Zuhair Abbas, Arifa Zahir, Jin Hur
doaj   +1 more source

The Influence of Mechanical Deformation Consideration on the Results of the Calculation of the Vacuum Circuit Breaker Drive Shaft

Journal of Mechanical Engineering, 2023
One of the important directions of theoretical, computational and experimental research related to the improvement and development of new design elements of modern electrical devices, primarily medium voltage circuit breakers and contactors, is the study
Yevhen I. Baida, Mykhailo H. Panteliat, Artem O. Kuzmin   +2 more
doaj   +1 more source