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首页> 外文期刊>Russian electrical engineering >The Efficiency of the Electric Motor of a Subsurface Pump with Reciprocating Action and Losses in a Leading-in Cable
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The Efficiency of the Electric Motor of a Subsurface Pump with Reciprocating Action and Losses in a Leading-in Cable

机译：具有引入作用的往复作用和损耗的地下泵的电动机效率

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摘要

The interdependence of loss in an alternating-current converter-fed motor with a frequency and level of supply voltage for an alternating-current converter-fed reciprocating action motor is shown in this work. The equations for efficiency of a supply cable with a length up to 3 km are presented. The influence of a step-down transformer and frequency converter on the losses was considered. It is determined that the line losses are commensurable with the motor losses. In this case, the line efficiency can be matched with the load and the efficiency reduced up to 50%. In addition, the transmission of practically maximum power to the motor is provided. The possibility of using the line losses for warming up a liquid is shown. In the case of a need to warm up a liquid warming, the current of the motor should have the rated value and the voltage frequency should be minimum. To decrease the losses in the line and in the motor, it is necessary to increase the voltage frequency to the rated value. Thus, it is determined whether the voltage frequency should be reduced or increased at the rated motor current. The expressions to calculate the necessary number of the modules of motor at the set well depth are presented. It is shown that, for depths 1, 2, and 3 km, it is possible to use the standard voltages of 380, 660, and 1000 V, respectively. With increasing well depth, the number of motor modules rises, which leads an increase in the voltage proportional to the well depth. An interdependence of the supply voltage of several motor modules with a well depth up to 10 km is obtained.
机译：这项工作显示了交流变频器供电的电动机中的损耗与交流变频器供电的往复运动电动机的频率和供电电压水平之间的相互关系。给出了最长3 km的供电电缆效率的公式。考虑了降压变压器和变频器对损耗的影响。确定线路损耗与电动机损耗相当。在这种情况下，可以使线路效率与负载相匹配，并且效率最多可降低50％。另外，提供了实际上最大功率向电动机的传输。显示了使用线损来加热液体的可能性。如果需要对液体加热进行预热，则电动机的电流应具有额定值，并且电压频率应最小。为了减少线路和电动机中的损耗，必须将电压频率提高到额定值。因此，确定是否应在电动机额定电流下降低或增加电压频率。给出了在设定的井深处计算电动机模块必要数量的表达式。结果表明，对于1、2和3 km的深度，可以分别使用380、660和1000 V的标准电压。随着井深的增加，电机模块的数量增加，这导致与井深成正比的电压增加。获得了深度达10 km的几个电机模块的电源电压的相互依赖性。

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