Industrial electric heating furnaces – Induction furnace device – Power supply system
Patent
1999-10-15
2000-11-14
Hoang, Tu Ba
Industrial electric heating furnaces
Induction furnace device
Power supply system
219661, 373149, H05B 606
Patent
active
061480193
ABSTRACT:
A system for melting metal and holding molten metal, comprises a rectifier unit receiving AC electric power and outputting DC electric power, a plurality of inverter units, each receiving the DC electric power output by the rectifier unit and outputting AC electric power; and a plurality of induction furnaces each receiving the electric power output by a respective inverter unit. Each inverter unit comprises a plurality of inverter modules connected in parallel, each module independently being connectable to and disconnectable from the rectifier unit and the furnace. The rectifier unit comprises a plurality of rectifier modules connected in parallel, each module independently being connectable to and disconnectable from the AC supply and the inverter units. The total power output of the rectifier unit is more than the sum of the powers required by all of the furnaces when they are holding a charge of molten metal, but less than the sum of the maximum powers required by each furnace when melting a charge of metal. If the total power demand is greater than the rectifier can supply, the power supply is reduced to those furnaces that are receiving more than the holding power.
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John H. Mortimer, P.E., Tomorrow's Induction Melt Shop Technologies Today, Foundry Management & Technology, Mar. 1999, pp. 14-16, 19, and 20.
John H. Mortimer, P.E., Tomorrow's Induction Melt Shop Technologies Today, Foundry Management & Technology, May 1999, pp. 41, 44, 46, 48 and 50.
Fishman Oleg S.
Mortimer John H.
Hoang Tu Ba
Inductotherm Corp.
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