据悉，玛尔挡水电站位于青海果洛藏族自治州玛沁县拉加镇上游约5千米的黄河干流上，是国家和青海省重点能源项目，也是国家实施“西电东送”和“青电入豫”的骨干电源点，是黄河干流龙羊峡上游湖口至尔多河段规划推荐开发的第12个梯级。总装机容量232万千瓦，其中地下厂房安装4台单机容量55万千瓦和1台单机容量12万千瓦的混流式水轮发电机组，水电七局承担全部5台机组的机电设备安装任务，是黄河上游在建海拔最高、装机容量最大的水电站。2023年8月，玛尔挡水电站大坝首台坝顶门机完成吊装。2023年11月14日，玛尔挡水电站正式下闸蓄水。

定子是发电机的核心部件之一，主要由定子机座、定子铁心、定子绕组三大构件组成。在发电机投入运行时，转子在水动能的带动下旋转，而定子用来接收旋转磁场，并且产生感应电动势，从而将机械能转化为电能。

玛尔挡水电站三号机定子铁心内径为12.90米，外径为14.10米，铁心高2.55米，由27万余张0.5毫米厚的高导磁、低耗、优质硅钢片叠装而成，叠装后定子机座及铁心总重达515吨。试验过程严格按照试验方案进行；每10分钟记录一次数据；整个试验历时90分钟，各项数据均符合要求，三号机组定子铁心顺利通过磁化试验。

It is reported that the Maerblock hydropower station is located in Qinghai Guoluo Tibetan Autonomous Prefecture Maqin County, about 5 kilometers upstream of the Yellow River main stream, is the national and Qinghai Province key energy projects, but also the national implementation of "west power to the east" and "green power into Henan" backbone power point, is the Yellow River main stream Longyang Gorge upstream lake mouth to Erdo river planning recommended development of the 12th echelon. The total installed capacity is 2.32 million kilowatts, among which 4 units with a capacity of 550,000 kilowatts and 1 unit with a capacity of 120,000 kilowatts are installed in the underground workshop. Hydropower Bureau 7 undertakes the installation of mechanical and electrical equipment for all 5 units. It is the hydropower station with the highest elevation and the largest installed capacity under construction in the upper reaches of the Yellow River. In August 2023, the lifting of the first dam top gate machine of the Maerbaffle Hydropower Station was completed. On November 14, 2023, the Maerblock Hydropower Station was officially opened to water.

The stator is one of the core components of the generator, which is mainly composed of the stator frame, the stator core and the stator winding. When the generator is put into operation, the rotor is rotated by the water kinetic energy, and the stator is used to receive the rotating magnetic field and generate the induced electromotive force, which converts the mechanical energy into electrical energy.

The stator core of the No. 3 machine of Maerblock Hydropower Station has an inner diameter of 12.90 meters, an outer diameter of 14.10 meters, and a core height of 2.55 meters. The stator frame and core weigh 515 tons after being stacked with more than 270,000 pieces of high magnetic permeability, low consumption and high quality silicon steel. The test process is carried out in strict accordance with the test plan; Record data every 10 minutes; The whole test lasted 90 minutes, and all the data met the requirements. The stator core of Unit 3 passed the magnetization test successfully.