High-current contactless ferromagnetic converters for multi-profile monitoring and control systems

Abstract

The article shows that the undesirability of breaking the current circuit for the temporary inclusion of electrical measuring devices, the presence of large power losses on shunts, the impossibility of breaking the circuit under the conditions of the technological process, as well as safety requirements caused contactless conversion and measurement of large DC currents in circuits without breaking them in metallurgy, electrochemical industry, railway transport, in laser technology, renewable energy sources, land reclamation, irrigation and in general in agriculture. Lightweight detachable wide-band stationary and portable non-destructive contactless converters and meters of large direct currents are not yet mass-produced worldwide. Therefore, it is very important to develop and study contactless converters and meters of large direct currents, having an extended range of converted currents with small dimensions and weight and increased accuracy and sensitivity, a simplified and technologically advanced design with low material consumption and cost, and the ability to convert both constant and variable high currents and fixed sensitivity control. All these requirements are met by the effective multifunctional magneto-modulating contactless converters of large direct currents developed by us. The results of the development of one of them are given in the work. The issues of its dynamics are considered. The results of his research are shown. It was found that the transition time for him is 0.025 of the period of the industrial frequency. Therefore, it can be considered practically inertia-free. The developed effective multifunctional magneto-modulating contactless converter can be widely used in monitoring and control systems in water supply, land reclamation, and irrigation, industry, railway transport, metallurgy, science, technology for contactless monitoring of constant and alternating currents, as well as for checking electric meters at the place of their installation.