| 摘要 |
<p>823,018. Induction furnaces. ALLMANNA SVENSKA ELEKTRISKA A. G. March 20, 1958 [April 3, 1957], No. 8909/58. Class 39(3) [Also in Group II] An electromagnetic stirring device comprises high permeability bars arranged above polyphase coils 3 wound on laminated yokes 1 perpendicular to the axis of the coils and the laminations to form a pole shoe-like assembly. Each bar 4 may be welded to a bar 8 of non-magnetic material Fig. 6, and the L-section bars assembled with the horizontal bars 4 insulated from the adjacent vertical bars 4 and held in place by non-magnetic holding bars 10 passing through slots 9 in the bars 4. The bars 10 are insulated from the bars 8 and the spaces between the bars 4 filled by fireproof material 5. In a modification, Fig. 8, high permeability bars 13 extending the width of the yoke are embedded in tubes 14 formed in the turns of the winding below alternate bars 4. The tubes 14 are formed by dividing the conductor into two parts of U-shaped cross-section. Cooling channels 15 alternate with the bars 13.</p> |
