主电流

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。

Therefore, the main spool displacement volume will be able to accurately size and with the current direction changes, leading to hydraulic actuators to control the flow and stress.

因此，主阀芯的位移量就能精确地随著电流的大小和方向而变化，从而控制通向液压执行元件的流量和压力。

The two wide used topologies of the main circuit of shunt active power filter which has the ability to compensate the neutral current are the three-leg split-capacitor topology and the four-leg topology.

具有中线电流补偿能力的并联有源电力滤波器主电路拓扑结构主要是三桥臂电容中分和四桥臂两种。

To achieve high-performance PMSM position servo system, advanced control scheme, which is static precision, transient responses and self-adaptation and anti-disturbances, is needed in practice. Based on the analysis on the features and control principles of PMSM, this thesis established its math model using id=0 vector control method. Three close loops control system, which includes current loop, velocity loop and position loop, was built up. For position loop, the main feedback loop, we chose a new adapted-fuzzy CMAC intelligent controller, which includes self-learn ability of neural net and quick response merit of fuzzy controller. Finally, the author simulates PMSM position servo system by the simulink of matlab, an advanced computer simulation tool.

本文对PMSM的控制机理和特性作了较为深入的分析；建立了PMSM的数学模型，并采用了id=0的矢量控制策略；对控制系统组成及控制方式作了分析和比较，在此基础上建立了电流环、速度环和位置环的三闭环控制系统，对作为反馈主回路的位置环采用了模糊CMAC神经网络控制方法，该方法兼具模糊控制器的快速性和神经网络的自学习能力；构建了针对PMSM位置伺服系统的模糊CMAC控制器结构及其相应的算法；利用先进的计算机仿真工具（Matlab下的Simulink）对所提出的控制策略进行了数字仿真和分析；仿真和实验结果表明本文所提出的控制策略对PMSM位置伺服系统进行控制具有良好的鲁棒性能和快速性。

Secondly, the nonlinear vibration of a mono-degree of freedom rotor supported by the AMBs is investigated also. With the altering of the PID controllers parameters, the typical nonlinear phenomena such as softening/hardening spring characteristic, jumps and separation of the resonance curve can be observed and analyzed.

其次，对PID控制的单自由度电磁轴承—转子系统由于力—电流／位移的非线性特性引起的非线性振动进行了分析研究，当控制器参数改变时，系统表现出软／硬弹簧特性，分析了主共振区的跳跃谐振及谐振曲线的分离现象。

Adopt one kind of design plan that PLC controls in the protection the main body of a book has been introduced succeeding an electricity in electric system, that capital is designed time is that the KV circuit imports 10 mainly , change into 380 V voltage grades, before the PLC front and back add front to passage and the queen to passage, change before to passage middle course electric current , voltage a train of, the wave filtering the general is exchanged changing waking up with a start for direct-current, the entering carrying out comparison and switch amounts again , controlling conducting entering PLC, by PLC, The malfunction signal is shown out by lamp light or the alarm signal.

本文介绍了在电力系统继电保护中采用PLC控制的一种设计方案，本次设计主要是将10KV线路输入，转化为380V电压等级，在PLC前后加入前向通道和后向通道，在前向通道中经过一系列的电流、电压转换，将交流转换为直流，进行滤波，再进行比较和开关量的输入，传入PLC，通过PLC的控制，将故障信号通过灯光或者报警信号表现出来。

Through the medium of designing and reckoning the electric main connection, designing and counting house supply, counting shortcircuit current, selecting and verifying electrical equipment as well as designing switching arrangement, it have accomplished the design of （4×125MW）condensing power station' electric once segmental that have been given.

通过对电气主接线的设计和计算、厂用电的设计和计算、短路电流的计算、电气设备的选择和校验以及配电装置的设计，简要完成了对所给（4×125MW）凝汽式发电厂的电气一次部分的设计。

Through the medium of designing and reckoning the electric main connection, designing and counting house supply, counting short-circuit current, selecting and verifying electrical equipment as well as designing switching arrangement, it have accomplished the design of the primary distribution system of the （110KV）substation that have been given.

通过对电气主接线的设计和计算、所用电的设计和计算、短路电流的计算、电气设备的选择和校验以及配电装置的设计，完成了对所给（110KV）变电所的电气一次部分的设计。

Through the medium of designing and reckoning the electric main connection, designing and counting house supply, counting short-circuit current, selecting and verifying electrical equipment as well as designing switching arrangement, it have accomplished the design of （4×125MW）condensing power station' electric once segmental that have been given.

通过对电气主接线的设计和计算、厂用电的设计和计算、短路电流的计算、电气设备的选择和校验以及配电装置的设计，简要完成了对所给（4×125MW）凝汽式发电厂的电气一次部分的设计。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。