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Torsion Resistant Former

IP.com Disclosure Number: IPCOM000195525D
Published in the IP.com Journal: Volume 10 Issue 5B (2010-05-24)
Included in the Prior Art Database: 2010-May-24
Document File: 2 page(s) / 98K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

Traditional magnet former structures require large amounts of material to withstand the axial, radial and torsional loads imposed on it by electromagnetic coil forces. These effects are particularly significant on the inner magnet end coils and the outboard shielding coils (see Figure 1). Current formers seek to resist coil forces within the former structure. However, the major requirement to minimize the distortion of the former at the coil thrust faces results in a massive structure of high intrinsic torsional rigidity. The resultant loads are also generally reacted through the inner former via the thrust face flange of the inner end coils. This is a critical region of the former, the end inner coils generally being the most sensitive to quench due to the severity and complexity of mechanical and electromagnetic stress and strain environment at this interface. Furthermore, the additional torsional load due to outer shield coil forces is a significant contributor to misalignment of the thrust face.

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Torsion Resistant Former

Idea: Russell Peter Gore, GB-Oxford

Traditional magnet former structures require large amounts of material to withstand the axial, radial

and torsional loads imposed on it by electromagnetic coil forces. These effects are particularly

significant on the inner magnet end coils and the outboard shielding coils (see Figure 1).

Current formers seek to resist coil forces within the former structure. However, the major requirement

to minimize the distortion of the former at the coil thrust faces results in a massive structure of high

intrinsic torsional rigidity.

The resultant loads are also generally reacted through the inner former via the thrust face flange of the

inner end coils. This is a critical region of the former, the end inner coils generally being the most

sensitive to quench due to the severity and complexity of mechanical and electromagnetic stress and

strain environment at this interface. Furthermore, the additional torsional load due to outer shield coil

forces is a significant contributor to misalignment of the thrust face.

In the following solution it is proposed that the torsional moment of the outer coils is balanced by an

equal and opposite torsional moment generated by the inner end coil. Due to the reduced lever arm

the torsional moment within the former structure will be reduced by a factor of 2 to 4. This should

enable material within the end former construction to operate more efficiently than current solutions,

while relocating former...