查询词典 magnetism

This text discussed how to choice the material of permanent magnet and transmit-magnet, design the circuitry of magnetism and the method of demagnetization and so on. There emphasize introduce the structure of permanent magnetism cupule of crane that using AlNiCo permanent magnet or NdFeB permanent magnet, application of RLC circuitry in using pulse to demagnetization and how to realize the lighter to weight, lower to cost and prolong using life for permanent magnetism cupule of crane by way of choosing in reason the parameter of R, L, C etc.

本文就节能、省材、安全的起重永磁吸盘设计制造中有关永磁材料与导磁材料选用、磁路设计组合、永磁体的充退磁方法等问题进行了讨论，着重介绍了用电脉冲充退磁的铝镍钴永磁、钕铁硼永磁或二者组合式的起重永磁吸盘的结构设计、RLC电路在脉冲充退磁技术中的应用，如何合理选用R、L、C等参数以实现起重永磁吸盘的小自重、低成本及长寿命。

The magnetic mechanical engineering technology is a new high-level technology in the current world, which uses the permanent magnetism materials to engage in the research, development and production of the permanent magnetism effect parts, including the magnetization parts, magnetism-droved machinery, magnetoelectricity machinery and so on.

磁机械工程技术是当前世界新兴的高水平的一项学科技术，是应用永磁材料从事磁化器件、磁驱动机械和磁电机械等永磁效应组件的研究、开发、生产；并逐步实现技术产业化、产品社会化的系统工程。

The main body of a book have analysed a generator losing the magnetism physics process , have given a generator out the fundamental equation losing the magnetism queen; By using simulated module of electric system in Matlab/Simulink,build a single infinity system emulation model , have included module such as generator , excitation system , transformer , idle work power source , circuit loads , infinity system , transmission line; Lose magnetism condition two kinds specifically for the excitation winding loses magnetism and the part completely losing magnetism, lower emulation having carried out different working condition, have gained machine holding stater voltage , have encouraged the magnetoelectricity stream , excitation voltage and output having performed meritorious service power wave form change condition; By simulated wave form of contrast , to every electricity amounts, change law has carried out theoretical analysis.

本文分析了发电机失磁的物理过程，给出了发电机失磁后的基本方程；通过使用Matlab/Simulink中的电力系统仿真模块，建立一个单机无穷大系统仿真模型，包括了发电机、励磁系统、变压器、无功电源、线路负载、无穷大系统、输电线路等模块；针对励磁绕组完全失磁和部分失磁两种失磁情况，进行了不同工况下的仿真，获得了机端定子电压、励磁电流、励磁电压和输出有功功率波形的变化情况；通过对比仿真波形，对各电气量变化规律进行了理论分析。

On the analysis foundation for the at the same time generator control law of permanent magnetisms have discussed the at the same time generator word of permanent magnetism of niter quantity to melt the function of every control son modular in control system and the specific ay of realizing, have put forward a set of at the same time generator word of permanent magnetism of entire quantity to melt the specific enforcement of control scheme, and according to this set of scheme having established the synchronous generator of permanent magnetism based on Simulink the word of entire quantity melts to control emulation model, for the control made scheme emulate to analyses.

在对永磁同步电机控制规律的分析基础之上，讨论了永磁同步电机全数字化控制系统中各个控制子模块的功能和具体的实现方式，提出了一套永磁同步电机全数字化控制的具体实施方案，并根据这套方案建立了基于 Simulink的永磁同步电机全数字化控制仿真模型，对所出的控制方案进行了仿真分析。

Therefore, from consideration of two sides, the way of using the DMX magnetism extinguishing switchs and the non-ohmic resistor coordinated magnetism extinguishing will become an improvement general orientation in the field of magnetism extinguishing.

从断流角度考虑，与灭弧栅配合使用的DM2灭磁开关存在不可避免的缺点，所以，从两个角度综合考虑，使用DMX灭磁开关与非线性电阻配合的灭磁方式将成为灭磁领域改进的一大方向。

According to modifying effect of magnetic field to resin, through modification of FRP pultrusion process and equipments, this dissertation developed FRP rebar magnetism curing pultrusion process, studied the effect of fabrication magnetic field intensity on mechanical performances of fabricated GFRP rebar, and confined the optimal intensity of curing magnetic field. Through durability contrast test of GFRP rebars fabricated with optimal curing magnetism intensity and without magnetic field in 80℃water, according to water-absorbing capacity and interlaminate shear strength, the effect of magnetism curing on the durability performance of GFRP rebar was studied.

根据磁场对树脂的改性作用，对FRP拉挤成型工艺设备进行改进，研究开发了FRP筋磁场固化拉挤工艺；研究了成型磁场强度对成型后GFRP筋力学性能的影响，确定了最佳磁场强度；对最佳磁场强度成型和无磁场成型GFRP筋进行80℃水中的耐久性对比试验，以吸水率和层间剪切强度为指标，研究了磁场固化工艺对GFRP筋耐久性的影响。

After process purification DNA needs once more magnetism bead purification processing, the magnetism bead under the specific liquid environment with the DNA adsorption, is fixed under the magnetic field function one side the centrifuge tube, only has DNA and the magnetism bead unifies in the together part is retained, then the use specific elutes the fluid clean, finally uses double steams the water to dissolve DNA, by now the magnetism bead and DNA were separated from, DNA preserved in the liquid, this obtained has purified, the high grade skeleton DNA sample.

在处理洗净DNA 需要一次更多磁性小珠洗净处理之后，磁性小珠在具体液体环境之下以DNA 吸附，是固定的在磁场作用一个边之下离心机管，只有有DNA 并且磁性小珠成一体在部份一起被保留，那么用途具体洗脱流动性干净，最后使用双词根水溶化DNA，在现在以前磁性小珠并且DNA 被分离了从， DNA 被保存在液体，这被获得净化了，高级最基本的DNA 样品。

Regular condition issues the transmitter measuring range as magnetism translates the board liquid place meter but looks at range , the transmitter form pole may flee about to move , 4 ~ 20 mA adjusting the transmitter form pole using the transmitter output signal are OK as magnetism translates the board liquid place meter but looks at range on the UB-B type transmitter being fixed according to what left picture shows with fastening circle translate the board liquid place in magnetism.

UB-B型变送器按左图所示用紧固圈固定在磁翻板液位指示计上，正常情况下变送器量程与磁翻板液位指示计计可视范围相同，变送器表杆可上下窜动，调整变送器表杆使变送器输出信号4~20mA与计可视范围相同即可。

Regular condition issues the transmitter measuring range as magnetism translates the board liquid place meter but looks at range , the transmitter form pole may flee about to move , 4 ~ 20 mA adjusting the transmitter form pole using the transmitter output signal are OK as magnetism translates the board liquid place meter but looks at range on the UB-B type transmitter being fixed according to what left picture shows with fastening circle translate the board liquid place in magnetism.

UB-B型变送器按左图所示用紧固圈固定在磁翻板上，正常情况下变送器量程与磁翻板计可视范围相同，变送器表杆可上下窜动，调整变送器表杆使变送器输出信号4~20mA与磁翻板计可视范围相同即可。

This thesis proposed the design and implementation of an ASIC for the motor control with DTC technology. Note that this ASIC is implemented by cell-based Design style with Verilog language.The basic principle of the Direct Torque Control is to select the switch sequence of the inverter. Those switches will control the magnetism and torque of the stator, to induce a fast response of the induction motor. Furthermore, the d-q axle's static coordinate, which is transferred from both the three-phase current and voltage, is used to compute the stator's magnetism and torque. By comparing with original values, those magnetism and torque will be calculated and set to new data. Then the switching table and the hysteresis controller are decided with the new data to generate a voltage vector and to control the stator magnetism and torque.

直接转矩控制的基本原理为经由侦测马达定子磁通与转子转速，来适当的选择变频器功率电晶体的切换状态，以获得快速且不易受外在环境影响的马达控制响应；首先，根据量测三相电流与利用变频器的切换状态取得马达的三相电压，将其转换至d-q轴静止座标，然后藉此估测马达的磁通量与转矩量，再分别与侦测的定子磁通量和转矩量比较后，得到定子磁通量与转矩量比较的结果，再利用DTC电压向量切换表(DTC Voltage Vector Switching table)，依定子磁通与转矩的比较值及马达所在的角度位置，来选择一个适当的电压向量，进而依切换顺序来激发功率电晶体，达到控制感应马达的目的。

I put some current in side the surface and use two planes to cut the surface, then made two Amperian loops, then do integral on Theta.

里面是电流分布，然后我是用两个面把那一堆电流切开，做两个安培环，然后在THETA角上做积分。

Toucans|for this musical revue in Brazil.

知道吗 我以前去找能唱歌的鸟|为巴西的音乐剧找巨嘴鸟