环电流

Production 200mm ~ 600mm, 400 400 mm, 500 500 mm of ordinary and high-density graphite electrode, using domestic technology of the sophisticated production of 3500 tons extrusion press; production 800mm ~ 1200mm above the carbon electrode, the use of domestic advanced horizontal high-frequency, amplitude of vibration of hydraulic molding machine production; calcination using low energy consumption, temperature, gas-balanced ring-type baking furnace; dipping into the cold out of hot billet; graphitization process color 16000KVA transformers, high current, low voltage, constant power; finished electrodes used comb knife domestic advanced way of processing, deviations small, with closely.

生产Φ 200mm ～Φ 600mm 、400×400㎜、500×500㎜普通和高密度石墨电极，采用国内技术成熟的 3500吨挤压机生产；生产Φ 800mm ～Φ 1200mm以上的炭素电极，采用国内先进的卧式高频、调幅液压振动成型机生产；焙烧采用能耗低、温度均衡的燃气式环式焙烧炉；浸渍坯热进冷出；石墨化工艺彩 16000KVA 变压器，大电流、低电压、恒功率；成品电极采用国内先进的梳刀方式进行加工，偏差小、配合紧密。

The simulation and experimental results prove that the PLL based sensorless control can obtain accurate speed and phase angle information of PMSG,have fast response,good current control effect,and good steady-state and dynamic performances,may be used to substitute conventional encoder to control the PMSG,by further improvement especially at low speed,for direct-driven WECS.

仿真与实验结果表明，锁相环无速度传感器控制能够准确获取电机转速与角度信息，响应速度快、电流控制效果好，具有较好的稳态与动态性能，经过进一步优化，特别是提高低速段性能后，可以在直驱风电系统中替代常规编码器实现对永磁同步发电机的控制。

It adopts a fractional-N PLL synthesizer to realize the FM modulator.An extra offset current has also been applied to eliminate the effects of the mismatch in CP.

该调制器基于小数分频锁相环技术，并在电荷泵单元中引入额外偏差电流消除电荷泵失配对带内噪声的影响。

With the drive of synchrotron ring magnets as the main target, a new scheme is proposed for producting pulsed large currents with flat top and bottom in a large inductance loading .

以同步加速器环磁铁的激励为主要对象，提出了在大电感负载中产生平顶平底脉冲大电流的一个新的方案。

The direct measure mode is that Hall part is set into the interspace of loop winding or magnet coil, then the magnetism voltage difference or the current is measured.

直测式是将霍尔器件置于具有线圈绕组或直穿母线的环型铁磁体气隙中，测出气隙里的磁压降，即为被测电流。

By means of the digital signal processor TMS320F240X developed for motor control, it can realize uncoupling of stators current and the algorithm of SVPWM.

以电机控制专用芯片TMS320F2407为核心构成控制电路，进行电流的解耦控制，产生了SVPWM波形，实现了交流异步电机速度闭环控制。

An injection type shunt hybrid active power filter was analyzed, it can suppress harmonic currents and compensate high capacity reactive power, nevertheless, a sharp boosting on DC-side voltage was found in application. Based on the analyses of the reasons, different solutions was proposed such as adoption of main circuit of multiple performances, the use of hysteretic control method, fore-feed control of reflowing current or direct control on DC-side voltage without a rectifier to supply.

研究一种兼具大容量无功补偿能力的注入式并联混合有源滤波器，并分析其在工程应用中发现的直流侧电压抬升现象及这种现象产生的原因，在此基础上提出从采用多重化主电路结构、滞环控制法、回灌电流前馈控制法和脱离整流电源直接对直流侧电压进行控制等几个方面来抑制直流侧电压抬升的方法。

Currently in a surface warship of the our country everyplace all provided with the sail coal gas body to report to the police the instrument on the boat, gas density that sensor adopt to convey gas density value traditional 4-20mA mode of analog signal, have to each measure passway allocate one is it is it report to the police to measure to have and density value show measuring board of function, as the density of gas measures the passway board of the different quantities of different outfit of the figure of the passway, but there is many figure of the large-scale naval vessel passway, so the volume of warning system will become very huge , unfavorable to attenbants to use, and traditional 4-20mA electric current ring transmits the signal, unfavorable to transmitting at a long distance, easy to bring and interfere.

核心提示：摘要目前在我国各地型水面舰船上都配备了航煤气体报警仪，气体浓度传感器采用的是传统的4-20mA模拟信号的模式传送气体浓度值，只好每个检测通道配备一块具有检测报警及浓度值显示功能的检测板，随着气体浓度检测通道数目的不同配备不同数量的通道板，但大型舰船通道的数目比较多，因此报警系统体积会变得十分庞大，不利于操作人员使用，而且传统的4-20mA电流环传输信号，不利于长距离传输，容易带来干扰。为了巡检的需要，需要将其改造成现场智能仪表，通过将传感器检测结果

And base on topological structure of SVG for three-phase three-wire system, it puts forward a control method of compensation current which is based on forecasting current strategy to improve the tracking accuracy of dictation current.

同时，在三相三线制电压型静止无功发生器拓扑结构的基础上，论证了两种直接电流控制方法：滞环控制和三角波控制。

By means of the study of three types of main-switch, it shows that the circuit inductance of the modified ring-small disk main-switch supported by parallel metal bars is feasible to achieve appropriate main current.

经过对三种主开关结构进行实验研究，结果表明：改进的并联金属棒支座圆环-小圆盘型主开关的导通电感比较合适，可产生较好的主脉冲电流。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。