No-load current

The Example and the Analyzing for Cause of Variation in No-load Current of Motors

电动机空载电流变化的原因及实例分析

The average of the line currents at rated voltage is the no-load current .

额定电压下线路电流的平均值即是空载电流。

Its main transformer is made of imported cold rolled silicon steel , So its power loss is little with low no-load current .

该系列点焊机，主变压器均为进口冷轨硅钢片，因此，主变压器功耗小，各型空载电流小。

System debugging process , no-load current experiments , no-load constant velocity tests and loading experiments are included . And the phenomenon are analyzed and discussed .

最后，本文利用设计的电路和软件进行了一定的电机驱动实验，主要包括系统调试过程、空载电流实验、空载恒定速度实验以及加载实验等，并就出现的现象进行了分析与讨论。

The principle of reducing the no - load loss , no-load current and noise of five-step laminated core is analysed . The analytical result shows that the structure adopted five step laminated core can improve no-load performance obviously .

分析了五级接缝铁心降低空载损耗、空载电流及噪声的机理，指出铁心采用五级接缝铁心结构能够大幅度提高变压器的空载性能。

Effect of power supply frequency to the welding transformer in the main circuit has been analyzed , and , through lab testing , appropriate series capacitance has been selected , which effectively reduce power voltage and no-load current of the transformer .

并针对斩波电路中工频分量对焊接变压器正常工作的影响进行了分析，通过试验选取合适的串联电容，有效的降低了变压器两端的工频电压及空载电流。

By calculating no-load compensation current , weight compensation current , accumulator tension compensation current , dynamic torque compensation current , the total torque compensation current is gotten .

论文分别对空载补偿电流、带钢重量补偿电流、活套张力电流、活套力矩动态补偿电流计算，得到前后活套转矩电机总的张力补偿电流；

As a result of core saturation during no-load closing , inrush current happened in the winding whose amplitude is several times of rated current has a tremendous impact on equipment safety and protection actuating .

在其空载合闸时可能会因铁心的饱和，绕组内出现额定电流若干倍大小的励磁涌流，对系统运行、设备安全和保护动作都会产生极大的影响。

In the simulation , the models in three kinds of condition including no-load , applying torque current and applying force current were solved , and the magnetic flux density was imported and plotted in the post-processing .

在仿真部分，本文主要对空载、施加转矩电流和施加牵引力电流三种情况进行了求解，并在后处理中导出了三种情况下的磁通密度。

It can be used as an independent relay , including crossing current brake circuit , no braking quick-break circuit , preventing no-load starting transformer inrush current , and avoiding fifth harmonics of overexcitation running for high-power transformer .

它可以作单个继电器用，具有穿越电流制动回路，无制动速断回路，且可防止空投变压器励磁涌流的影响，对大容量变压器还可躲开过励磁运行时五次谐波的影响；

The testing results and the calculating results of the perameters such as no-load loss , no-load current and short-circuit impedance of several 240MVA / 220kV double-winding step-up transformers are compared and analyzed . The experienced coefficients of the parameters are given .

对几台240MVA/220kV双绕组升压变压器的空载损耗、空载电流和短路阻抗这几个重要参数的试验数据和设计计算值进行了比较与分析，得出了这些参数的一些经验系数。