查询词典 electromagnetic induction

On the basis of different behaviors of alternative electromagnetic field for induction and electromagnetic shaping, the process of dual frequency electromagnetic shaping of molten metal was firstly presented.

从固态金属感应加热熔化和液态金属电磁成形两个角度出发，讨论了金属熔体双频电磁成形中的频率选择，物理量的分布以及两种双频电磁成形的试验过程。

Firstly, according to electromagnetic field theory, the 2-dimensional (2-D) mathematical model of a three phase squirrel-cage Y802-2 induction motor is developed. Then general equations can be deduced from finite element discrete and functional analysis. The motor's 2D solving region of electromagnetic field is given based on the boundary conditions and assumption conditions of the squirrel-cage induction motor. Through finite element mothod and inner–outer convergence method, magnetic field distributions and magnetic forces of bars can be calculated in following rotor conditions: health rotor, one single broken bar, two adjacent broken bars, two broken bars with one good interval, two broken bars with two good interval and four adjacent broken bars.

本文首先根据电磁场理论建立Y802-2型三相笼型感应电动机二维电磁场的数学模型，并对其进行了有限元离散以及泛函分析，推导出总体方程；在基本假设和边界条件基础上，给出笼型感应电动机二维电磁场的求解区域，然后应用有限元并结合内外双收敛方法，对样机稳态运行进行数值计算，得出电机在转子完好、一根导条断裂、连续两根导条断裂、间隔一根两根导条断裂、间隔两根两根导条断裂及连续四根导条断裂六种情况下的磁场分布和导条所受电磁力的变化情况。

The electromagnetic responses of the finite size induction coils were evaluated, and the effects of the borehole mud ,casing pipe and radius of the induction coils were analyzed, the sensitivity of the electromagnetic response to the formation resistivity was checked against the crosshole measurements.

分析了金属套管井中有限尺寸线圈的电磁响应特征，讨论了井眼泥浆参数﹑套管参数和不同线圈尺寸对电磁测井响应的影响，考察了金属套管中电磁测井对地层电阻率变化的灵敏度。

That is to say, during the starting process of induction motor, hold-off angle of current has gradually decreased from initial value to zero. The method can always make the displacement angle less than thyristor's firing angle. So the voltage of the induction motor won't oscillate. Therefore, the oscillation of current, electromagnetic and speed can be eliminated during the soft-starting process of induction motor. This paper verifies the correctness of the method by simulation at first.

根据上述原因，本文提出了采用关断角控制的新型控制策略，这种控制策略是使电动机在起动过程中的电流关断角由某一初始值逐渐减小到零，利用该方法可以使感应电动机起动过程中的续流角始终小于晶闸管的触发角，这样续流角的变化就不会引起电动机端电压的振荡，因而就从根本上消除了感应电动机软起动过程中的振荡现象。

Production of major products is a sealing machine, shrinking packaging machines, body-packaging machines, vacuum packing machines, liquid flexible packaging machines, hot Dama Ji, printing machines, plastic machine, Binder, electromagnetic induction-sealing machine, marking machine , Flap machine, cling film packaging machine, the press, Su Ping Capper.

现生产的主要产品有封口机、热收缩包装机、贴体包装机、真空包装机、液体软包装机、热打码机、移印机、吸塑机、捆扎机、电磁感应封口机、标示机、折边机、保鲜膜包装机、过塑机、塑瓶封盖机。

In addition, we also operate faster FASTJET series of on-line laser marking machines, the series of electromagnetic induction foil-sealing machine, various Pen Maji supplies.

此外，我们还经营迅捷FASTJET系列在线式激光标刻机、系列电磁感应铝箔封口机、各种喷码机耗材。

The company specializes in the design, manufacture automatic linkage filling machines, automatic filling machine, screw-capped machine, covered rolling machines, labeling machines, automatic electromagnetic induction Lvbo-sealing machine, batch machine, paging equipment and other series.

本公司专业从事设计、制造自动灌装联动机、自动灌装机、旋盖机、轧盖机、贴标机、自动电磁感应铝泊封口机、批号机、分页机等系列设备。

Based on the law of electromagnetic induction, a method to measure the magnetic susceptibility variation of liquid metals was proposed and the instrument was developed. The fundamental of the instrument was also analyzed.

摘 要：提出一种基于电磁感应原理的测量液态金属材料磁化率变化的方法并开发相应装置，分析该装置的基本工作原理。

The common interference sources of microprocessor-based protective equipment are sum-marized,including power supply interference,electrostatic and electromagnetic induction interference,signal channel interference,and so on.

归纳了微机保护装置常见的干扰源，主要有供电系统、静电感应、电磁感应及信号通道等干扰，分析了干扰对装置正常工作的影响。

Visual, Pressure and leak, Penetrant, Thermal, Radiography, Acoustic, Magnetic, Electrical and electrostatic, Electromagnetic induction, Miscellaneous.

外观检查法；加压检漏法；超声波探伤透过法；热力探伤法；辐射照相术；声波探伤法；磁力探伤法；电学和静电探伤法；电磁感应探伤法；其他。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。