Impedance matching apparatus for connecting high frequency...

Details Impedance matching apparatus for connecting high frequency... Impedance matching apparatus for connecting high frequency...

H - Electricity

05

B

H05B 6/08 (2006.01) B23K 13/01 (2006.01)

Patent

CA 2238492

High frequency electrical heating apparatus in which metal parts (10) are heated as they are advanced, either for annealing or forge welding purposes, and in which the electrical heating current is supplied by a solid state D.C. to A.C. inverter (2-5, 8) through a load matching and frequency control circuit (13) which maintains the desired load current and current frequency with changes in the load impedance caused by the metal parts (10) as they are advanced.

Appareil électrique chauffant haute fréquence dans lequel des pièces métalliques (10) sont chauffées au fur et à mesure qu'elles avancent, pour des opérations de revenu ou de soudage à la forge, et dans lequel le courant électrique de chauffe est fourni par un onduleur à semi-conducteur (2-5, 8) via un circuit d'adaptation de charge et de régulation de fréquence (13) qui maintient le courant de charge et la fréquence de courant voulus malgré les changements dans l'impédance de charge causés par les pièces métalliques (10) au fur et à mesure qu'elles avancent.

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