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This paper is to introduce an innovative direct-drive switched reluctance generator (SRG) wind turbine generating system. With the rapid growth of wind energy in recently years, wind generation plays a more important role in global electricity generating. Variable speed wind turbine generating systems are the trend of wind generation, comparing to the old fashion of fixed-speed system. Three typical...
This paper presents a drivetrain scheme with torque ripple reduction, in which two switched reluctance motors are coupled mechanically in cascade. The proposed scheme enables the shaft torque ripple of switched reluctance motors reduced. The simulation and experimental results testify the proposed scheme. The steady-state and dynamic performances of the drivetrain system are demonstrated and can be...
Based on the requirements of electric vehicles on electric motor drives, this paper presents three criteria to evaluate motoring operation of in-wheel switched reluctance motor drives for electric vehicles. They are the average torque, the average torque per rms current, and torque smoothness factor. They indicate the motoring torque, copper loss and torque ripple, respectively. The model of motoring...
When the thickness of tunnel oxide layer is thinner than 7 nm, the defects of tunnel oxide will form the leakage path easily. The trapped charges in trapping layer leak out through the leakage path and let we read the wrong data information. Therefore, the novel oxynitride process has been proposed to improve the reliabilities of flash memory by reducing the interface states and bulk defects. Moreover,...
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