我国自主创新的蒸发冷却技术，应用于水轮发电机组绕组冷却，取得了极其良好的效果。它是继水冷之后的新内冷技术，并可取代沿用多年的水内冷。它除了具有水内冷的优点外，还克服了水内冷的本质性的弱点：泄漏和堵塞及其产生的严重后果。蒸发冷却，作为一种高效的冷却技术，受到国内外电机专家的关注已近40年了，中国科学院顾国彪院士倾注了数十年心血，潜心研究，走过了基础研究、工业机组研制和扩大工程实践技术研制应用的全过程。当国外还处在实验室阶段时，1983年我国研制了两台10MW高速机组，1992年又研制了50MW机组，1999年研制了400MW机组，都成功投入了运行，从未发生过故障。证明它比水内冷更可靠，证明它是一项成熟的技术。自上个世纪八十年代，我国开始生产大中型电磁除铁器起，经20多年努力，相继开发出风冷式、油冷式和干式电磁除铁器。运行中的大中型电磁除铁器数以千计，基本满足国民经济发展的需要。但是，风冷式电磁除铁器，适应环境能力差、寿命较短。油冷式电磁除铁器体积庞大、重量较重、成本不菲。干式电磁除铁器温升较高，常高达100K以上，磁势大幅增加，绝缘等级上升，制造成本急增，成为干式除铁器发展的难题。所谓把蒸发冷却技术用于电磁除铁器，即是把电磁除铁器的绕组和铁芯浸泡在冷却介质中，当除铁器通电时，绕组导体发热，并逐渐为周围介质加热，当达到一定温度时，冷却介质汽化，汇集于除铁器顶部，经过冷却器后，又变成液体，在重力作用下，流回冷却介质中，如此在密封条件下反复自循环。其循环的动力，就是绕组的部分热能本身。没有泵和噪音，一切都安静和可靠的运行。蒸发冷却技术的显著特点是，冷却介质绝缘性能好，汽化的温度低(通常不超过50℃)，导体的温度亦低(最高不超过70℃)，因而绕组的温升一般低于20K，比风冷式电磁除铁器还低。因而应用蒸发冷却技术于解决电磁除铁器绕组温升问题，是理想的选择。如此显著降低电磁除铁器的磁势，其所得的好处，足以抵偿使用冷却介质而增加的成本，使其总造价低于干式和油冷式电磁除铁器。 The evaporative cooling technology of China's independent innovation has been applied to the winding cooling of hydraulic generator sets, and achieved very good results. It is a new internal cooling technology after water cooling, and can replace water cooling which has been used for many years. In addition to its advantages of water cooling, it also overcomes the essential weakness of water cooling: leakage and blockage and its serious consequences. Evaporative cooling is an efficient cooling technology, by domestic and foreign experts have been focused on motor for nearly 40 years, academician Gu Guobiao Chinese Academy of Sciences devoted decades of effort, through painstaking research, basic research, development and expansion of the whole process of the industrial technology development should be used in engineering practice. When foreign countries are still in the laboratory stage, in 1983, China developed two 10MW high-speed units, and in 1992 developed the 50MW unit. In 1999, the 400MW unit was successfully put into operation and never had a fault. It proved to be more reliable than water cooling, and proved to be a mature technology. Since the 80s of last century, China began to produce large and medium-sized electromagnetic Separators. After more than 20 years' efforts, air-cooled, oil cooled and dry-type electromagnetic Separators have been developed. Thousands of large and medium-sized electromagnetic iron separators are in operation, basically meeting the needs of the national economic development. However, air-cooled electromagnetic Separators have poor environmental adaptability and short service life. Oil cooled electromagnetic separators are bulky, heavy and expensive. The temperature rise of dry electromagnetic iron remover is often higher than 100K, the magnetic potential increases greatly, the insulation grade rises, and the manufacturing cost increases rapidly, which becomes the difficult problem of dry iron remover development. The evaporative cooling technology for electromagnetic separator, which is the electromagnetic separator winding and iron core soaked in the cooling medium, when the separator is energized, the winding conductor heating, and gradually heating the surrounding medium, when it reaches a certain temperature, the cooling medium is vaporized, gathered in the separator at the top, after cooler, it turned into liquid under gravity flow back into the cooling medium, so the sealing condition under repeated self circulation. The power of its circulation is the part of the heat itself of the winding. Without pumps and noise, everything is quiet and reliable. Characteristics of evaporative cooling technology is a cooling medium, good insulation properties, low temperature vaporization (usually less than 50 DEG C), the temperature of the conductor is also low (maximum not more than 70 DEG C), and the winding temperature rise is generally lower than 20K, than the air-cooled electromagnetic separator is low. Therefore, it is an ideal choice to apply the evaporative cooling technology to solve the temperature rise problem of the electromagnetic separator winding. Thus, the magnetic potential of the electromagnetic separator is remarkably reduced, and the benefits thereof are sufficient to compensate for the increase in the cost of using the cooling medium, so that the total cost is lower than that of dry and oil cooled electromagnetic separators.