Solid State Technology Volume: 3 Issue: Publication Year: 2020 5598

Solid State Technology 
Volume: 63 Issue: 5 
Publication Year: 2020 
5608
Archives Available @ www.solidstatetechnology.us 
В, mТ
В, mТ
after 
demagnetization
before 
demagnetization
weld spot 1
1
0,5
0
-0,5
-1
-2
750
750
1500
1500
1, m
1, m
1
0,5
0
-0,5
-1
weld spot 2
weld spot 3
weld spot 4
Fig. 11. Rail lash measurement results in the Bayavut-Yangier section 
The Sergeli-Angren railway section was examined for magnetization. During 
demagnetization, the speed of the electric locomotive ranged from 5km/h to 30km/h. The 
control system was configured so that the current decreased in the windings of 
electromagnets from 12A in the first phase, with a pulse duration of 50ms, in the second 8A 
with a pulse duration of 40ms, the third 3A with a pulse duration of 30ms at a speed of 
5km/h. The following values were set for a speed of 30km/h: in the first phase, the current is 
20A for 60ms, in the second phase is 15A for 55ms, and the third 5A for 35ms. 
During operation, 6 points of the site were revealed with excess magnetic induction in excess 
of the normative values (magnetization norm for rail lashes 0,7mT; for butt joints 1mT; for 
turnouts 1,2mT). When measuring magnetic induction with a teslameter at the butt joints of 
the rails of the Ozodlik station, the magnetization of the rails was 1,4mT, turnouts at the 
Akhangaran station the magnetization was 1,6mT, and at the Angren station the 
magnetization of the rails was 1,2mT. After passing the pulsed demagnetization car, the 
magnetization value of the butt joints (Ozodlik station) was 0,1mT, on turnouts (Akhangaran 
station) 0,2mT and on the rails of Angren station, the magnetization was 0,1mT. 
IV. CONCLUSION 
The characteristics of the demagnetization of rail lashes when changing the gap between the 
heads of rails and electromagnets are determined. As a result, the working values of the gaps 
are determined theoretically and experimentally calculated, at which the best demagnetization 
effect is obtained. 
Methods for eliminating impulse noise affecting the operation of ILSD devices and methods 
for the demagnetization of rail lashes of railway automation and telemechanics are 
developed. As a result, the performance characteristics of demagnetizing devices are 
obtained.
Tests of a mobile mobile pulsed device for the demagnetization of a platform car at different 
locomotive speeds were carried out. As a result of measurements, the values of magnetic 
induction are many times less than the nominal. When increasing the speed from 5km/h to 
30km/h, it is necessary to set the pulse duration from 30ms to 50ms and currents from 8A to 

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