Intermediate frequency electric furnace

as one of the harmonic equipment

must be subject to harmonic governing.When designing the filtering compensation equipment

the actual measurement of operation harmonic data is generally required.However

in case of no measured operation harmonic data in actual engineering design

the theoretical harmonic data is defined as engineering design base by way of analysis of power factor and harmonics of thyristor three-phase bridge type complete control rectification circuit adopted for intermediate frequency power supply

the analysis of characteristic harmonic current generated in theoretical calculation and also in combination with analysis of actually measured harmonic data of intermediate frequency electric furnace in load.A good operation result is obtained and the design method for passive filtering compensation design of intermediate frequency electric furnace is summarized

which has very good significance in instructing actual project.