Abstract
The paper substantiates the need to use non-contact conversion and measurement of large direct currents using magnetic modulation contactless transducers of increased sensitivity for land reclamation, irrigation, industry, metallurgy and agriculture and water management in general, and the results of their design development are presented. It is shown that the developed converter, in contrast to the known ones, has increased accuracy and sensitivity, a technologically advanced design and low weight and dimensions with low material consumption and cost. Characteristics of information non-contact magnetic modulation converters statically are considered. It is shown that the value of the excitation value corresponds to a certain maximum value of the measured value. In this case, the maxima of the measured value, increasing in value with an increase in the excitation value, are shifted towards the increase in the measured value. The discrepancy between the experimentally and theoretically obtained static characteristics of the converter does not exceed 6 percent. The developed converter can be widely used in electrical systems in land reclamation and irrigation, in water supply, industry, railway transport, science, technology, and for checking electric meters at their installation site for contactless control of direct and alternating currents.
Highlights
It was revealed that the instability of the current control systems, the presence of additional resistances due to the oxidation of the contacts lead to a decrease in the performance of electrical installations, to downtime, and large voltage drops on the shunts lead to unjustified power losses
The ever-increasing requirements for the elements and technical means of monitoring and control systems in the electric power industry, railway transport, as well as agriculture have led to the development of energy-saving contactless magneto-modulation converters of large direct currents with detachable integrating circuits (MNT), which allow for wrapping around the device without violating the structural and circuit integrity conductors with convertible LDC [3 - 5]
We have developed several universal energy-saving non-contact galvanomagnetic converters of large direct currents, allowing without breaking the circuit to convert both direct and alternating large currents in various monitoring and control systems, in which the tasks are solved by using special designs of detachable closed magnetic circuits with transverse and longitudinal distributed magnetic parameters and increased path length of the working magnetic flux over steel [2]
Summary
In the electric power industry, powerful electrical consumers are widely used, in which large electrical installations are used, in the operation of monitoring and control systems of which large direct currents (LDC) are used, which, in turn, must be controlled [1-11]. As a result of the analysis of the conducted studies, an urgent need was revealed at many industrial enterprises and in farms in the irrigated agriculture zone of the Republic of Uzbekistan in the non-destructive contactless control of LDC with a value from 100 A to 30. KA using both portable and stationary measuring transducers (MT) with an error of 1 – 3 %, using in several cases multi-range, as well as with a flexible, integrating circuit of IP nondestructive testing LDC [2], [12-23] It was revealed that the instability of the current control systems, the presence of additional resistances due to the oxidation of the contacts lead to a decrease in the performance of electrical installations, to downtime, and large voltage drops on the shunts lead to unjustified power losses.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
