瞬时电流

In this paper, two harmonic current detecting methods based on the theory of instantaneous reactive power of three-phase circuits are analyzed and compared with different voltage condition.

分析了基于瞬时无功功率理论的三相电路谐波电流检测的两种算法，并根据算法原理在不同电压条件下进行了对比研究。

The instantaneous voltage PID control inverter has advantage on circuit and cost, compared with voltage current dual-loop control inverter.

逆变器瞬时电压PID控制与电压电流双环控制相比，在电路结构、成本等方面更具优越性。

In order to realize this function, the instantaneous values of the three-phase voltage and current are converted to the d-q coordinates in the ACR block of the terminal controller so as to suppress interaction between the active and reactive components, as shown in Fig.

为了实现这一功能，三相电压电流的瞬时值被转换到终端控制器ACR的d-q坐标系，使得抑制交直流成分之间的相互作用，如图二所示

Then, the instantaneous voltage feedback control circuit of the Z source inverter with an inner loop of the output filter inductor current is designed. The validity of the double close loop control strategy is verified by simulation and experiment results.

首先对阻抗源逆变器的逆变部分进行了建模，其次简要介绍了传统电压源型逆变器的控制策略，然后以带滤波电感电流内环的电压瞬时值反馈控制为例介绍了阻抗源逆变器的输出电压控制的实现。

Based on the needs of system control strategy and the output of the active inverter, a switch function method was adopted to build the average model of switch cycle for the active inverter in order to accurately analyze operation characteristic of active inverter, a feed forward and double loop control strategy is put forward, its double control includes a inductor current inner loop control and instantaneous voltage outer loop control.

中文摘要：为准确分析有源逆变器的运行特点，根据系统控制策略的需要，在考虑了有源逆变器输出的基础上采用开关函数法建立了有源逆变器的开关周期平均模型。提出一种前馈加双环控制的控制策略，它的双环控制包括一个电感电流内环控制和一个瞬时电压外环控制。

In this thesis, the design scheme of a DSP-controlled inverter applied in mobile generator is presented at the beginning and then the design method of control system is mainly discussed. Equivalent output impedance model of instantaneous voltage and current closed-loop controlled inverter is established on the foundation mentioned above. How the values of LC filter, parameters of PI regulator and feedback coefficient etc. affect the external characteristic of inverter is analyzed in detail. Non-linear factor of inverter are also discussed and corresponding solutions are put forward.

本文首先给出了移动发电机DSP控制逆变模块的设计方案，着重讨论了控制系统的设计方法，在此基础上建立了电压电流瞬时值双闭环控制的逆变模块等效输出阻抗模型，对滤波器LC值、PI调节器参数和反馈系数等各项因素对逆变模块输出外特性的影响进行了详细分析，并探讨了逆变模块中非线性因素对输出波形的影响，提出了相应的解决方案。

Anion action Tourmaline printed on bed sheets etc will clear up electric current of 0.06 milliampere as long as contact the water , this weak electric current is very suitable for human body , meanwhile produce a lot of anion continuously .

印刷在床单等布料上的电气石一接触水，瞬时产生最适合人体的0.06毫安微弱电流，电气分解水分子，不断产生负离子。

As a current cut, cut renewable overpotential, and instantaneous power semiconductor cooling fans overheating protection.

如过电流切断、再生过电压切断、半导体冷却风扇过热和瞬时停电保护等。

MATLAB simulation results show that the instantaneous symmetrical components detect the positive sequence voltage component accurately ,the result of current tracking of the space vector control is good.

MATLAB仿真结果表明，改进的瞬时对称分量法准确的检测出了a相电压正序分量，空间矢量控制电流跟踪效果良好。

Simulation research on method for harmonic current detection of single-phase circuit based on instantaneous reactive power theory of three-phase circuit was presented.

提出了基于三相电路瞬时无功理论的单相电路谐波电流检测方法的仿真研究。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。