Study of energetic performances of a power static converter with current-source and parallel resonance inverter for induction heating applications

This paper analyses the energetic performances of an induction heating system for a pipe rolling machine, based on a single-phase current inverter. The study was based both on the real system experimental measurements, as well as on the equivalent Simulink model of the system. The obtained simulation results performed on the measured experimental conditions confirmed the validity of the virtual system. At the same time, the system structure was adopted for a given inductor corresponding to the rolling plant, and for a set of typical pipes. For each pipe, the compensating capacitor value was chosen according to the working frequency corresponding to the thickness of the processed pipe, the resonance frequency of the reactive circuit being equal to the working frequency. The aim of the paper was the performance analysis of the system as well as the power quality analysis at the grid side and at the load side of the system.