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A new dimmer for alternating-current directly driven light-emitting-diode lamp 被引量:1
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作者 KIM Jong-hyun RYU Myung-hyo +1 位作者 YOON Hyok-min SONG Eui-ho 《Journal of Central South University》 SCIE EI CAS 2012年第2期374-379,共6页
A new dimmer using a mental-oxide-semiconductor field-effect transistor (MOSFET) for alternating-current (AC) directly driven light-emitting-diode (LED) lamp was presented. The control method of proposed dimmer is pul... A new dimmer using a mental-oxide-semiconductor field-effect transistor (MOSFET) for alternating-current (AC) directly driven light-emitting-diode (LED) lamp was presented. The control method of proposed dimmer is pulse width control (PWM) method. Compared with the conventional phase-controlled dimmer, the proposed PWM dimmer can produce sine wave and did not cause harmonics problem. Furthermore, the proposed control method did not amplify the light flicker due to the independence of input voltage. Therefore, the PWM dimmer can be used as the dimmer of the AC LED lamp instead of the conventional phase-controlled dimmer. The experimental result shows that the proposed PWM dimmer has good performances. 展开更多
关键词 alternating-current directly driven light-emitting-diode pulse width control total harmonic distortion flicker triac
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Research of variable speed directly driven SRG wind power system position sensorless based on DFNN by FEA 被引量:1
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作者 YI Ling-zhi WANG Gen-ping WU Jiang-liao 《Journal of Coal Science & Engineering(China)》 2011年第1期107-112,共6页
A new method of switched reluctance wind power generation position sensorless based on DFNN by FEA was proposed, Through current and magnetic linkage to get the angle of SRG rotor position, the nonlinear mapping of cu... A new method of switched reluctance wind power generation position sensorless based on DFNN by FEA was proposed, Through current and magnetic linkage to get the angle of SRG rotor position, the nonlinear mapping of cur- rent-magnetic linkage-angle was built, By training these sample data from FEA, the angle of SRG rotor position was replaced by the output of DFNN to achieve SRG position sensorless. Simulation results show that the error between actual rotor position and estimate rotor position is small; SRG can commutate with great accuracy; and the output voltage of SRG wind power system under variable wind speed is essentially constant. 展开更多
关键词 variable speed directly driven switched reluctance generation(SRG) dynamical Fuzzy neuro-network(DFNN) finite element analysis(FEA)
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Non-spherical polymersomes driven by directional aromatic interactions 被引量:2
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作者 Mingyan Luo Yunjun Luo Xiaoyu Li 《Science China Materials》 SCIE EI CSCD 2018年第3期437-438,共2页
Polymersomes,nanoscopic polymer vesicles self-assembled from synthetic block copolymers,are ideal candidates for drug delivery and synthetic biology,due to their characteristic of high stability,chemical
关键词 PEG NIPAM Nature Non-spherical polymersomes driven by directional aromatic interactions THF
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