输入电流

The experiment results of the improved and the former charger/discharger are given in the end. The results indicate that the harmonic currents of the improved one have been reduced obviously.

最后，论文通过实验对改进前后充放电器电路的输入电流进行了比较，表明该改进方案对输入电流的低频和高频谐波都有较好的抑制效果。

Points out that the switching frequency、the input inductance and the output power all have great contribution to the input-current THD. When the output power goes up, the input current harmonic content keeps almost constant, thus the THD goes down.

指出开关频率、输入电感和输出功率对输入电流THD有显著影响，发现整流器输出功率增加时，输入电流谐波含量基本不变，从而输入电流THD减小。

The input current is analyzed by switching function method and the expression of lower harmonic current is given.

采用开关函数法对网侧的输入电流进行谐波分析，得出输入电流中低次谐波的表达式。

With voltage measurements, the input current is ideally zero; thus, any input current represents an error.

对电压测量来说，理想的输入电流应为零，所以，一切输入电流都代表误差。

This invention relates to a cascade multiple zero-type matrix rectifier, in which, a general input filter is connected between a net and a step-down transformer to get sine-wave input current, the step-down transformer includes n secondary windings with Yn spliced mid lines, the phase of all the three-phase windings is the same, the rectifier array is arrayed in a 1 row x n lines by n zero-matrix rectifier units, each line of which is connected with the seconday winding of the step-down transfornmer, and the outputs of the rectifier units are serial orderly to form a DC output, the general controller is responsible for regulating work of the entire system and connected with the branch controllers by signal cables to control the work of the rectifier units in the array.

本发明涉及一种级联多重化零式矩阵整流器，总输入滤波器连接在电网与降压变压器之间，滤波得到正弦波形的输入电流，降压变压器有n个Yn接带中性线的次级绕组，所有三相绕组相位相同，整流器阵列由n个零式矩阵整流器单元排成1列×n行的阵列，阵列中每一行与降压变压器的一个次级绕组对应连接，阵列中整流器单元的输出依次串联，形成一路直流输出，总控制器负责控制调节整个系统的工作，并通过信号电缆与各个分控制器联络，控制整流器阵列中每个整流器单元的工作。本发明由低压小功率的变换器串联得到幅值可调的高压直流电源，同时在电网侧得到位移为零的输入电流，具有网侧四象限运行能力等优点，适用于中高压直流供电领域。

The theoretical analysis and simulation results of 1kW 40~60VDC/380VDC full-bridge Boost mode two-input DC-DC converter have shown that the converter has the advantages such as double isolation among multiple input sources and between output and input of the converter, simple topology, strong voltage matching ability, multiple input sources can supply the power simultaneously or individually, small input current ripple, high power density, high conversion efficiency, high reliability at short circuit, magnetic flux of high-frequency transformer easy to add up etc.

1kW 40～60VDC/380VDC全桥Boost型双输入直流变换器的理论分析和仿真结果表明，这种变换器具有多路输入源之间以及输出与输入源之间双隔离、电路拓扑简洁、电压匹配能力强、多路输入源可同时或分时供电、输入电流纹波小、功率密度高、变换效率高、负载短路时可靠性高、高频变压器磁通易于叠加等优点。

CY2000 stable high-current test system or are only a computer-controlled automatic recording systems, real-time monitoring of input current waveform, but also by setting the trigger conditions×transient input current waveform.

CY2000大电流稳升试验测试系统是国内唯一一款计算机控制的自动记录系统，可实时监测输入电流波形，还可按设定的触发条件扑捉瞬态输入电流波形。

This ideal input current will make sure nearly with between phase and undistorted wave of input voltage.

为了提高用电设备的效率以及减少所造成的谐波污染，在本文中提出了一个高效能的主动功率因数校正电路，本架构是以电压电流以及负载的关系，将输入电压以及输出负载经由运算后得到理想的输入电流，使得输入电流几乎与输入电压同相位且无失真，藉此消除输入电压与输入电流之相位差与电流失真，以减少电力的虚功消耗以及谐波成份。

A zero rippled input current and continuous output current Buck-Boost converter topology converter was proposed.

针对传统Buck-Boost输入输出电流断续的缺点，提出一种基于独立电感零纹波输入电流和输出电流连续的Buck-Boost变换器，详细分析了变换器的稳态工作原理。

Controls direction by supplying an input current into one of the two proportional solenoids and controls flow by changing the input current.

控制方向，提供输入电流成比例的两个螺线管并控制通过改变输入电流的流动。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。