Solid State Technology Volume: 3 Issue: Publication Year: 2020 5598
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Solid State Technology
Volume: 63 Issue: 5 Publication Year: 2020 5603 Archives Available @ www.solidstatetechnology.us a - and b- in the transverse direction; c - in height Magnetic lines of force enter the core about 3/4 of the length of its lower and lateral faces. Approximately 1/4 of the length of the core against the rail head, the lines of force do not enter the core body. If we increase the area of the core parallel to the rails, while leaving the core section unchanged, then the magnetic flux through each area of the core surface will be: . (10) The entire flow coupled to the core circuit will be: . (11) We construct power tubes on the circuits that bound the areas of the dS core. Since the lines of the vector are always closed in a magnetic field, the force tubes turn out to be closed. If we denote the axis of the tube L, then the circulation of the vector вalong the axis of any tube will be equal to the loop current: (12) Therefore, when changing the width of the cross section of the core in the longitudinal direction and decreasing the height, the magnetic flux penetrating the core area increases, which leads to an increase in the EMF in the receiving coils of the locomotive, and without changing the current in the rail circuits. In this regard, it is proposed to increase the width of the core in the longitudinal direction to 100 mm, and reduce its height to 50 mm, while the core area remains unchanged and equal As a result of the proposed modernization, . The values of the EMF induced in the two receiving coils of the locomotive with a change in the core width versus frequency ν are shown in Fig. 6. Based on the results of the study, recommendations were made on the uptime of the ILSD and the elimination of deficiencies in its operation [11, 12]. The reliable operation of the ILSD will be when the core of the receiving coils of the locomotive is installed at a distance of 300 mm from the left end and horizontally above the rail head at a distance of 250 mm. In this case, the presence of connecting jumpers from the body to the body of each traction motor; locomotive receiving coils must be removed from the running current of the bearing parts of the electric locomotive; locomotive receiving coils must be rigidly fastened, in order to avoid harmful EMF of mechanical vibrations; rail lash joints should be fastened not with steel cables, but with copper terminals; on non-encoded and non-electrified sections of railways, the zero rail lash must be grounded every 250 meters. The earthing switch should be made of pipes driven to a depth of 1 meter from the surface of the Earth, a triangle with sides of 1,5 meters should be welded to each pipe. |
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