摘要
针对传统电流控制方法在静止无功发生器(SVG)无功补偿方面存在的缺陷,提出了一种基于电压定向矢量控制的方法(VOC),即将矢量控制应用于煤矿供电网电压控制之中。该电压定向矢量控制技术通过仿真,并将样机应用于阜新五龙矿供电网的结果表明,VOC的SVG具有良好的动态性和实用性,无功补偿效果良好,使得以SVPWM控制为代表的电流控制方式的缺陷得到了很好的弥补。
A new kind of preparation method of two-component polyurethane adhesive of artificial grass was in-troduced, the main raw materials were polyether polyol and isocyanate, and MOCA as the chain extender. Influ-ence of mass ratio of different polyethers, chain extender dosage, mass ratio of isocyanates and isocyanate index on the operation time, debonding time and mechanical properties were studied. The results showed that the operation time,debonding time and comprehensive mechanical properties were the best when the isocyanate index was 0？99, mass fraction of MN-3050 and DL-1000 was 80 and 20 in group A, the mass of MOCA was 4 portions in component A, the mass ratio of MDI-50 and PM-200 in component B was 1∶1 and the mixtured mass ratio of component A and B was 2∶1 .
出处
《煤矿机电》
2014年第5期30-32,37,共4页
Colliery Mechanical & Electrical Technology
