Device for positioning and melting electrically conductive mater

Details Device for positioning and melting electrically conductive mater Device for positioning and melting electrically conductive mater

1989-09-18

1990-12-18

Envall, Jr., Roy N.

Industrial electric heating furnaces

Induction furnace device

219 75, H05B 632

Patent

active

049791826

ABSTRACT:
Two coils, between which a sample is kept in a contactless suspended state, are connected to separate power sources, at least one of which comprises a phase shifter. Both power sources are controlled by a common oscillation generator. If both currents in the coils are in phase, a magnetic dipole-field of high heating capacity is obtained. If the two currents in the coils are in counterphase, a quadrupole-field is obtained, which generates a high positioning force. By modifying the phase difference, it is possible to generate optional superpositions of the dipole-field and the quadrupole-field, whereby the parts of heating capacity and positioning capacity can be varied.

REFERENCES:
patent: 2686864 (1954-08-01), Wroughton et al.

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