In order to obtain the dynamic characteristics of C-shaped armature, the finite element software Ansoft was used to model the C-shape armature of simple square-bore railgun based on the assumption of no disjunction an...
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Due to the high JC of the superconductor, the volume and the weight of the generator can be significantly reduced if the superconducting coils are used. This paper has designed a 40-pole racetrack excitation winding f...
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By using an active snubber, a novel implementation of the zero-voltage transition (ZVT) semi bridgeless boost power factor correction (PFC) converter is proposed. The active snubber reduces the reverse-recovery-relate...
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This paper mainly studies the speed control for a permanent magnet synchronous motor (PMSM) system with parameters uncertainties and torque change. PMSM is a typical nonlinear multivariable coupled system, and is sens...
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ISBN:
(纸本)9781479988068
This paper mainly studies the speed control for a permanent magnet synchronous motor (PMSM) system with parameters uncertainties and torque change. PMSM is a typical nonlinear multivariable coupled system, and is sensitive to the load disturbance and the changing of motor parameters. Hence, the drive performance of PMSM is deteriorated when faced with all kinds of disturbances. A new control algorithm based on nonsingular terminal sliding mode control (NTSMC) is designed to replace the traditional sliding mode control (SMC) in this paper, which can provide effective control for the speed regulation of PMSM servo system with parameter uncertainties and torque change. The high performance in simulation results are proposed to verify the effectiveness of this proposed method.
Ultra-high voltage (UHV) projects are making power system growing lager and resulting in sharp increase of short circuit currents in some area especially in the vicinity of UHV access points. The paper presented the d...
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A province in the central China faces the problem of energy shortage, 800kV Mengxi UHVDC project will effectively broaden the energy input channels of the province, enhance energy supply security, and reduce the press...
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Wind energy source has been paid high attention to and developed into one of the most mature and largest-scale mode of new energy power generation. However, the uncertainty and fluctuation of wind power brings great c...
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We proposed a novel visible polarizer based on multilayer silicon and silicon oxide alternative subwavelength grating and its optical characteristic is numerically investigated by finite difference time domain method....
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A fast π bistable twist nematic (π-BTN) liquid crystal display controlled by nucleation process is developed. The nucleation induced by the patterned spacer inside the cell. The response time is fast and it depends ...
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Due to the effect of the computation and modulation delays on the capacitor-current-feedback active damping, the digitally controlled LCL-filtered inverter tends to be unstable as the LCL-filter resonance frequency ap...
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