Results 11 to 20 of about 10,109 (244)

Challenges of Large Converter-Fed Synchronous Machines for Variable-Speed Pumped Hydro Storage

Energies, 2023
The green energy transition of electrical energy production is leading to an increasing share of total energy production for volatile renewable energy sources, mainly wind and solar power. To handle this volatile production, flexible and efficient energy
Stefan Polster, Johannes Deschler, Herwig Renner, Aurelie Bocquel, Martin Janssen   +4 more
doaj   +1 more source

Bearing Current and Shaft Voltage in Electrical Machines: A Comprehensive Research Review

Machines, 2023
The reliability assessment of electric machines plays a very critical role in today’s engineering world. The reliability assessment requires a good understanding of electric motors and their root causes.
Kotb B. Tawfiq, Mehmet Güleç, Peter Sergeant   +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

Motor Bearing Damage Induced by Bearing Current: A Review

Machines, 2022
The occurrence of the motor shaft voltage and bearing current caused by the inverter will aggravate bearing damage and lead to the premature failure of bearings.
Jiaojiao Ma, Yujian Xue, Qingkai Han, Xuejun Li, Changxin Yu   +4 more
doaj   +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

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

Design and test of a novel 1kw Stirling engine generator

Nihon Kikai Gakkai ronbunshu, 2023
This paper describes a practical design of a novel Stirling engine generator and 1kW machine test data. This machine’s configuration is a 4 cylinder double acting Stirling engine coupled with a Halbach PM generator in line.
Tetsumi WATANABE, Kazumasa SHIWAKU
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  

Reduction of Shaft Voltage of IPMSM According to the Shape of the Novel Shield Ring

IEEE Access
Recently, the motor drive system of electric vehicles (EVs) has been increased to high voltage to enhance the output and efficiency of the motor. However, higher voltage exacerbates common-mode voltage (CMV), which is the main cause of bearing faults ...
Jun-Kyu Kang, Jun-Hyeok Heo, Su-Hwan Kim, Jin Hur   +3 more
doaj   +1 more source