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Improved Packaging and Cooling of Magnetic Repulsion Coils

IP.com Disclosure Number: IPCOM000106951D
Original Publication Date: 1992-Jan-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 4 page(s) / 150K

Publishing Venue

IBM

Related People

Bruhn, PH: AUTHOR

Abstract

Improved packaging and cooling will permit building tools with smaller diameter coils on closer pitched spacing that are able to be fired at higher voltages to attain higher punching speeds and forces.

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This is the abbreviated version, containing approximately 52% of the total text.

Improved Packaging and Cooling of Magnetic Repulsion Coils

       Improved packaging and cooling will permit building tools
with smaller diameter coils on closer pitched spacing that are able
to be fired at higher voltages to attain higher punching speeds and
forces.

      The present design of coil packaging will permit a coil density
of 8 mm diameter coils on 10 mm centers.  As shown in Figure 1, it
would be impractical to reduce coil diameters and spacing beyond this
point.  The cooling of the coils in the present design would also be
marginal since in the present design the coolant does not flow
through the cooling fins in the rear of the coils.  The coolant flows
into the fins and is trapped in a restricted area.  Since the
velocity of the coolant flowing over the fins determines the cooling
effect on the coil, an improved flow path for the coolant is required
for the smaller diameter coils which have less fin area and must be
fired at higher voltages in order to generate similar punching
characteristics.

      The improved design shown in Figs. 2 and 3 will permit coolant
to flow through finned areas of the coil and into a chamber, which
provides a return path.  It will also permit higher density packaging
(smaller more closely spaced coils).  In Figure 1 (present design)
the coil is fired by sending a current through the center post of the
coil.  The circuit is completed by current flow through the outer
post, which is connected to the last turn...