共搜索到11462条信息,每页显示10条信息,共1147页。用时:0小时0分0秒406毫秒
J. Cent. South Univ. (2016) 23: 841-849 DOI: 10.1007/s11771-016-3131-z A novel current vector decomposition controller design for six-phase permanent magnet synchronous motor YUAN Lei(袁雷), HU Bing... the fundamental and harmonic subspace separately. To this end, a current vector decoupling control algorithm for six-phase permanent magnet synchronous motor (PMSM) is designed. Using the proposed......
. High temperature electric conductivity based on the conventional direct current four-electrode technique was tested using an experimental furnace by treating the powders at a heating rate of 5 K/min...J. Cent. South Univ. Technol. (2009) 16: 0703-0707 DOI: 10.1007/s11771-009-0116-1 Effect of BaO addition on relative density and electric conductivity of xNi/10NiO-NiFe2O4 cermets HE Han......
......
of electric current distributions in hall heroult cells[A]. Light Metals [C]. Warrendale, Pennsylvannia, USA, TMS, 1989. 219-226. [5]El-Demerdash M F, Khali E E, Ahmed H A, et al. Modelling of metal...Numerical simulation of current distribution in metal pad of aluminum reduction cells QI Xi-quan(戚喜全), FENG Nai-xiang(冯乃祥), CUI Jian-zhong(崔建忠) (School of Materials and Metallurgy, Northeastern......
and Engineering, Harbin Institute of Technology, Harbin 150001, China) Abstract: A nanostructured nickel alloy and a Ni/Si3N4(w) composite were fabricated by pulse current electrodeposition... alloy; low temperature superplasticity; pulse current electrodeposition 超塑性是材料在断......
electrical pulse was set in 60V. The controlling mode called step-down current method is shown in Fig.1. This method could make the MAO process more stable and more effective. Big electric current i0... rectangular pulse appears. Moreover, there is a large current impact when the pulse polar changes. The electric current steep rising is often observed during the anodizing process of magnesium alloy when......
Mechanism of ultrasonic-pulse electrochemical compound machining based on particlesZHANG Cheng-guang(张成光), ZHANG Yong(张勇), ZHANG Fei-hu(张飞虎) (School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China)Abstract:The electric double layer with the transmission of particles was presented based on the principle of electrochemistry. In accordance......
electrodeposition, pulse electro- deposition with higher instantaneous current density is easy to prepare metal matrix composites with better performance by varying pulse parameters[4-5]. At present, co... average current densities were 15 A/dm2 and 1.5 A/dm2; forward and reverse pulse working times were 300 ms and 40 ms, respectively. 316L stainless steel was used as anode material, and common carbon......
="ChDivSummary" name="ChDivSummary">Nickel/nano-Al2O3 composite coatings produced by the pulse electrodeposition method and the influence of pulse parameters, i.e., pulse frequency, duty cycle, and current... of the specimen. The assessment results clearly reveal that the specimen exhibits the maximum hardness at the pulse frequency of 20 Hz, duty cycle of 30%, and peak current density of 0.4 A/cm2 , which......
, current density and final voltage were introduced and the relation between duty cycle and current density was deduced. In addition, the research progress about the effects of electric parameters on coating...; Sketch diagrams of direct current (a) and alternating current (b) 图2 正(单)脉冲电流(a)和双脉冲电流(b)波形示意图 Fig.2 Sketch diagrams of positive (unipolar) pulse current (a) and bipolar pulse......