公开(公告)号：US3878311A

公开(公告)日：1975-04-15

申请号：US43488874

申请日：1974-01-21

Applicant: ASEA AB

Inventor： ANDERSSON CONNY ,  FREDRIKSSON BENGT

IPC: H05B6/16 ,  H05B6/20 ,  H05B6/24 ,  H05B5/14

CPC classification number: H05B6/20

Abstract: A channel-type electric induction heating furnace inductor unit for melting metal, has a metal frame which includes metal side walls having core clearance openings through which a transformer core surrounded by an induction coil extends, the frame supporting refractory forming a channel vertically looping around this core and coil, other core clearance openings being formed through the two walls and the balance of the core extending downwardly outside of these walls and through these other openings to form a closed magnetic flux circuit. Each wall has a gap or slot formed in it and which extends from one opening to the other, the portions of the walls below the core being structurally united or made integral. Since all of the portions of the walls are outside of the core, the formation of eddy currents in the latter are reduced or eliminated. The core is made as two separable parts with one part carrying the induction coil being separable from the furnace and the other core part and the latter comprising a structural part of the frame providing support for the latter.

Abstract translation: 一种用于熔化金属的通道型电感加热炉电感器单元，具有金属框架，该金属框架包括具有芯间隙开口的金属侧壁，由感应线圈包围的变压器芯通过该间隙开口延伸，框架支撑耐火材料形成垂直环绕该槽的通道 芯和线圈，其他芯间隙开口通过两个壁形成，并且芯的平衡部分向下延伸到这些壁的外部并且穿过这些其它开口以形成封闭的磁通电路。 每个壁上都有一个形成在其中的间隙或槽，并且从一个开口延伸到另一个开口，芯下面的壁部分在结构上是一体的。 由于壁的所有部分都在芯的外部，所以在后者中的涡流的形成被减少或消除。 芯体由两个可分离部分构成，其中一部分承载感应线圈可与炉分离，而另一个芯部包括框架的结构部分，为后者提供支撑。

公开(公告)号：US3900695A

公开(公告)日：1975-08-19

申请号：US47060474

申请日：1974-05-16

Applicant: ASEA AB

Inventor： ANDERSSON CONNY ,  HANAS BERTIL ,  KORSELL TORSTEN ,  NILSSON JAN

IPC: H01F27/28 ,  B21C23/00 ,  B21C23/22 ,  H01B1/02 ,  H01F5/00 ,  H01F27/08 ,  H01F27/16 ,  H02K3/22 ,  H05B6/36 ,  H05B5/12

CPC classification number: H01F5/00 ,  B21C23/007 ,  B21C23/22 ,  H01B1/026 ,  H05B6/367

Abstract: An electric induction furnace has an inductor coil formed from a tubular conductor through which cooling water may be flowed, and which is made with an inner layer of corrosion-resisting copper or copper alloy and an outer layer of aluminum or aluminum alloy and which, although oxidizable in air, forms an electrically nonconductive oxide layer eliminating the risk of short-circuiting between the coil convolutions. Material costs are reduced by making the aluminum layer considerably thicker than the copper layer. The two layers are integrated under high mechanical pressure during the manufacture of the conductor, the electrical resistance between the interfaces of the two layers being negligible.