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In the actual operation, the stator magnetic slot wedge is vibrated by the large alternating electromagnetic force, which causes the stator magnetic slot wedge to defect and then affect the starting performance and efficiency of motor.
With the wireless power transfer (WPT) upgrade and improve, WPT systems will be widely the load of transformers. When a transformer is connected to a WPT system, the vibration noise from the transformer core will increase because of the harmonics generated by the load. In the field of transformers with multistep-lap cores, magneto-elastic vibration is mainly caused by magnetostriction. It is feasible...
With advantages of low emissions, fuel flexibility, high efficiency and energy saving, micro turbines (MTs) are one of the most important technologies for distributed generated systems (DGSs) [1,2]. With many advantages such as high power density, simple structure, and higher efficiency, high speed permanent magnetic generator systems (HSPGSs) attract more attentions from the world wide researchers...
This paper presents the theoretical analysis of the inherent reason of current harmonic and power oscillation phenomena in case of operating the microgrid inverter under unbalanced grid voltage conditions. In order to flexibly control the current harmonic and power oscillation, a new stationary frame control strategy is proposed. It has a simple control structure due to no need of a phase-locked loop...
Nonlinear emission from plasmonic nanostructures is studied by measuring the second harmonic and third harmonic emission as a function of geometry. An overlap integral and mode-matching considerations accurately predict the optimal geometry.
By tightly focusing a high repetition rate (50 kHz), compact, femtosecond laser system with low pulse energy (25 muJ), we demonstrate fully phase matched, fully spatially coherent, 50 kHz high harmonic beams for the first time.
We demonstrate that using longer-wavelength driving light in high-order harmonic generation requires moderately ionized larger-density atoms to perfectly phase match the process, scaling conventional phase matching at low ionization to extremely high photon energies.
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