MKD112B-048-GG0-AN 力士乐 R911275185 同步电机

　　在1917 年出现了台圆筒型直线电动机，事实上那是一种具有换接初级线圈的直流磁阻电机，人们试图把它作为发射装置，但其发展并没有超出模型阶段。在1923 年，有人提出用扁平感应直线电动机去驱动一种连续运行的站台系统，打算把它敷设在街道上，当时建造了试验轨道，然而没有获得成功。从1840 年到1930 年前后，这一时期的直线电机研究就象一个未出生的孩子，正处于孕育阶段;就象一棵没出土的树苗，正处于萌芽阶段。也有文章认为这一阶段是暗中摸索的阶段。这个阶段，虽然人们有许多好的设想，从理论上也作了许多探讨，但由于没有从实验上去论证这一切理论，以致于有不少直线电机方面的机理尚没真正搞清楚，许多好的设想却没能付诸实现。鉴于这些情况，它迫使各国的科研人员暂时放下了理论，埋头致力于将直线电机理论及各种设想模型予以证实的工作，即实验研究工作。至此，从1930 年到1940 年期间，直线电机进入了实验研究阶段，在这个阶段中，科研人员获取了大量的实验数据，从而对已有理论有了更深一层的认识，奠定了直线电机在今后的应用基础。从1940 年到1955 年期间，世界一些发达国家的科研人员，在实验的基础上，又进行了一些实验应用工作。1945 年，美国西屋电气公司首先研制成功的电力牵引飞机弹射器，它以7400kw 的直线电机为动力，成功地用4.1s 的时间将一架重4535kg 的喷气式飞机在165m 的行程内由静止加速到188km/h 的速度。它的试验成功，使直线电动机可靠性好等优点受到了应有的重视，随后，美国利用直线电机制成的、用作抽汲钾、钠等液态金属的电磁泵，为的是核动力中的需要。1954 年，英国皇家飞机制造公司利用双边扁平型直流直线电机制成了发射的装置，其速度可达1600km/h。在这个阶段中，尤需值得一提的是，直线电机作为高速列车的驱动装置得到了各国的高度重视并计划予以实施。在1840 年到1955 年的直线电机探索实验和部分实验应用时代，其直线电机与旋转电机的相互竞争当中，由于直线电机的成本和效率方面没有能够战胜旋转电机，或者说，直线电机还没能找到唯独它能解决问题的领域，以及直线电机在设计方面也没有突破性的成功。所以，直线电机在这一时代始终未能得到真正的应用。

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　　The first cylindrical linear motor appeared in 1917. In fact, it is a DC reluctance motor with exchanged primary coil. People try to use it as a missile launcher, but its development does not exceed the model stage. In 1923, it was proposed to use flat induction linear motor to drive a continuous platform system, which was intended to be laid on the street. At that time, the test track was built, but it was not successful. From 1840 to around 1930, the research of linear motor in this period is like an unborn child, which is in the pregnant stage; Just like a sapling that has not been unearthed, it is in its infancy. Some articles also believe that this stage is a stage of secret exploration. At this stage, although people have many good ideas and have made many discussions in theory, due to the lack of experimental demonstration of all these theories, many mechanisms of linear motor have not been really understood, but many good ideas have not been put into practice. In view of these circumstances, it forces the researchers of various countries to put aside the theory temporarily and devote themselves to the work of confirming the linear motor theory and various hypothetical models, that is, experimental research. So far, from 1930 to 1940, the linear motor entered the experimental research stage. In this stage, researchers obtained a large number of experimental data, so as to have a deeper understanding of the existing theories and lay the foundation for the application of linear motor in the future. From 1940 to 1955, researchers from some developed countries in the world carried out some experimental application work on the basis of experiments. In 1945, Westinghouse Electric Company of the United States first developed the electric traction aircraft catapult. Powered by 7400kw linear motor, it successfully accelerated a 4535kg jet aircraft from static to 188km / h in 4.1s within 165m. The success of its test has paid due attention to the advantages of good reliability of linear motor. Subsequently, the electromagnetic pump made of linear motor and used to pump liquid metals such as potassium and sodium in the United States is for the needs of nuclear power. In 1954, the Royal aircraft manufacturing company of Britain made a device for launching missiles by using bilateral flat DC linear motors, with a speed of 1600km / h. At this stage, it is particularly worth mentioning that linear motor, as the driving device of high-speed train, has been highly valued by all countries and is planned to be implemented. In the era of linear motor exploration experiment and some experimental applications from 1840 to 1955, in the competition between linear motor and rotating motor, linear motor has not been able to beat rotating motor in terms of cost and efficiency, or linear motor has not been able to find a field where it can solve problems alone, and there is no breakthrough success in the design of linear motor. Therefore, linear motor has not been really applied in this era.