工频

The enterprise wons two advanced WHYH-1000WF oxidize porcelain and ceramics equipments production line, 1 the series hot mold extruding production line(one ton main frequeney induetion furnace is a set of ,one ton middle induction furnace 2 sets of, 800 ton extruder one set of ) and perfect kits analyze, examinaton equipments ect.

企业拥有先进的WHYH—100WF氧化陶瓷设备生产线2条，连铸热塑挤压生产线1条（1吨工频电炉1套、1吨中频电炉2套，800吨挤压机1套）以及完善配套的化验、检测设备等。

In order to raise the anti-corrosion ability of melting aluminum pot, the TGT-4 composite ceramic protecting coat is used to protect iron pot in the aluminum alloy melting in different factory which use induce furnace, oil-burning furnace, or electric resistance furnace to melt aluminum. The advanced protecting characteristic and long-effect mechanism of TGT-4 coat are analyzed and investigated. A model of iron pot cracking mechanism and related countermeasures are proposed for factory consulting.

为了提高熔铝铁埚的抗铝液腐蚀能力，在不同厂家的工频炉、油炉、电阻炉熔铝中，用TGT-4复合陶瓷防护涂料进行铁埚防护，对TGT-4涂料的优良防护性能及长效作用机制进行了分析研究；对生产中提出的一直困扰熔铝界的铁埚开裂问题进行了调研与分析，提出了铁埚开裂机制的模型和预防对策，供生产厂家参考应用。

Roger since the invention of the transistor oscillation push-pull single transformer DC converters, is to achieve high-frequency conversion control circuit beginning in 1957 the U.S. investigation self-invented the push-pull Two-transformer, 1964 U.S. scientists have proposed abolition of the frequency of the series switching power supply transformer, as envisaged in this power to the volume and weight of the decline was a fundamental way.

Roger发明的自激振荡推挽晶体管单变压器直流变换器，是实现高频转换控制电路的开端，1957年美国查赛（Jen Sen发明了自激式推挽双变压器，1964年美国科学家们提出取消工频变压器的串联开关电源的设想，这对电源向体积和重量的下降获得了一条根本的途径。

1 In Zhanjiang Power Plant has been analysed,and it is believed that the main causes to be as follows:(1)large deformation of the lowpressure cylinder leading to collision and friction between moving and stationary parts;(2)the vacant space under bearing pedestal and turninggear box bringing on lower rigidity;(3) the natural frequency of bearing pedestal is closing to the power frequency etc.

对湛江发电厂1号机4号轴瓦振动大的问题进行分析，认为其主要原因为：低压缸变形大导致动静碰摩，轴承座及盘车箱下部脱空引起刚度降低，轴承座的固有频率与工频相近等。

In the light of the pickup current of a submersible electric pump being too large when started at full pressure, a new variable-frequency control system is developed.

针对电动潜油泵工频全压启动时存在启动电流过大等诸多问题，开发出新型电动潜油泵变频控制系统。

High-power rectifier devices can work efficiently to high frequency alternating current into direct current, in the'60s and'70s, Thyristor power rectifier tube and to the development and application of great development.

大功率硅整流器能够高效率地把工频交流电转变为直流电，因此在六十年代和七十年代，大功率硅整流管和晶闸管的开发与应用得以很大发展。

With analysis on the control model, an improved automatic tuning method for arc-suppression coil is proposed, that is: adopting voltage feed forward control to restrain interfere of 50Hz displacement voltage, which can improve the characteristic of the injected signal significantly, make the injected signal without reference to unbalanced network and neutral displaced system. Another innovation is detecting the magnitude of neutral point signal-frequency voltage to judge the resonant state, which improves the sensitivity and accuracy of resonant judgement effectively.

基于对控制模型的分析，提出了一种新的注入变频信号的消弧线圈自动调谐方法：通过电压前馈校正控制的引入，有效抑制了50Hz工频电压对注入信号的干扰，使得注入信号不受电网不对称及中性点位移电压的影响；提出以中性点注入信号电压幅值最大做为新的谐振判据，有效提高了谐振状态判断的灵敏度和准确度。

Experiments show that the digital trap filter based on window function method of FIR can efficiently reduce the power line interference in SEMG.Furthermore,the frequency around 50 Hz does not be obviously influenced.

实验证明，采用基于窗函数法的FIR原理设计的50 Hz数字陷波器能有效滤除SEMG中的工频干扰并基本不影响50 Hz周围有效SEMG的获取。

At present, the owner cupola 2, 1.5 tons and 3 tons of the 1-frequency electric furnace, 0.75 tons and 0.25 tons of the intermediate frequency electric furnace 1,"the level of continuous casting of cast iron profiles" production line, has all kinds of machine tool equipment, more than twenty, 30 2500 a three-roll Bending Machine, welding machine, gas welding a number of Taiwan.

目前，拥有冲天炉两座，1.5吨和3吨工频电炉各一座，0.75吨和0.25吨中频电炉各一座，&铸铁型材水平连续铸造&生产线一条，有各类机床设备二十余台，30×2500三辊卷板机一台，电焊机、气焊机若干台。

Surge current: 10 x 8/20 s wave in total; AC current: 10 x 1 s /50 Hz in total 2 Nominal DC spark-over voltage

浪涌电流：10 x 8/20 s总电流波；工频电流：10 x 1 s /50 Hz 总电流 2 标称直流击穿电压

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。