A Study of Ignition, Combustion, and Arc Break in a Direct Current Arc Furnace with a Pulsed Transistor Power Supply

详细

In this paper, we analyzed the processes occurring in a transistor pulsed direct-current power supply loaded on an inductive load with an arc. An imitation model was developed in the Simulink environment and adequately reflects all the processes occurring in a real power supply. The model allows obtaining time dependences of the quantities characterizing the system operation in a larger volume compared with the dependences measured directly using the physical model. A feature of the developed model is the possibility of observing temporal dependencies on all elements of an electrical circuit. Specifically, using the developed model, it was possible to obtain waveforms of the self-induction electromotive force (EMF) arising on the inductance of a short circuit at an arc break. We proposed a system of relative values, which allows obtaining the generalized electrical characteristics of an adjustable pulsed direct-current supply loaded on an inductive circuit with an electric arc. A feature of the proposed system of relative values ​​is that time is kept real. This enables a more visual comparison of the temporal characteristics of various power supplies.