• Megatherm Electronics Private Limited

Induction Melting & Holding Furnaces

Megatherm Electronics (P) Ltd offers a range of Induction Melting and Holding Furnaces (crucibles). Built in capacities up to 50 tonnes, the design offers extremely rugged construction, easy maintainability, negligible stray heating due to extensive magnetic shielding, high degree of safety due to optimum grading of electrical insulations, optional accessories such as protective net guards, closed capture fume hoods, stationary fume suctions rings with swivelling lid, quick lining removal mechanism pneumatically operated remote furnace charge over cum isolation switches, load cell arrangement, etc. The coil and the magnetic shield are designed using latest electro-magnetic software programs. The result is optimum impedance matching with the power source and faster melting rates even with loose initial charges, besides high energy efficiency. The structural designs are based on FEM software programs, which consider both static and dynamic load of the charge as well as the crucible, besides accounting for the three dimensional electro-magnetic forces.

Power sources and control system for induction melting: the proven "parallel resonant current fed" topology is employed to ensure highest degree of reliability and efficiency besides ensuring constant power tracking in a variable impedance load as commonly encountered in an induction melting cycle. The result is improved load factor and maximum productivity per kVA of unity demand. The converter houses a controlled rectifier converting fixed 50/60 Hz AC voltage to variable DC voltage followed by a DC link reactor that acts as a current source of an inverter, which is turn converts DC to AC of desired frequency. The parallel capacitor bank that supplies the reactive power demand of inductive load is either separately built or integrated within the converter housing, de-ionised water is employed to cool the power source by employing plate type heat exchanger that separates it from the electrically conductive primary cooling water source.

The Company also offers Induction Long Bar Heater, Induction Wire / Wire Rope / TMT Bar Heater, Induction Billet Heaters, etc.