Design and performance of Sandia's contactless coilgun for 50 mm projectiles

Kaye, R.J.; Cnare, E.C.; Cowan, M.; Duggin, B.W.; Lipinski, R.J.; Marder, B.M.; Douglas, Gary; Shimp, K.J.

doi:10.1109/20.195657

Cited by 67 publications

(27 citation statements)

References 10 publications

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“…q and p are the form parameters of the driving coil. According to (6), it is easy to compute the self-inductance of the driving coil. The self-inductance of the driving coil achieved the above theoretical method is about 150.46μH.…”

Section: A Computation In Theorymentioning

confidence: 99%

“…The two important components of the induction coil launcher (ICL) are the driving coil and the armature. Reference [1]- [6] simulated and evaluated the performance of ICL through its circuit equations, mechanics equations and the armature's motion equation. The circuit equations involve the self-induction of the driving coil, the mutual inductance and the mutual inductance gradient between the driving coil and the armature.…”

Section: Introductionmentioning

confidence: 99%

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Inductance Computation Consideration of Induction Coil Launcher

Zhao¹,

Cheng²,

Zhang³

2008

2008 14th Symposium on Electromagnetic Launch Technology

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Inductance computation is an important issue for the design of the induction coil launcher (ICL). The self-inductance of the driving coil and the system equivalent inductance of ICL are investigated in the paper. Computation equations are presented. Both theoretical computation method and simulative computation method are employed for the inductance computation. Theoretical computation methods consider the influence of the per turn coil's distribution, and the simulative method doesn't consider the influence of per turn coil's distribution. Under the condition of static magnetic field, the deviation between the theoretical computation result (L=150.46μ H) and the simulative result (L=147.22μH) is low, which shows that per turn coil's distribution has little influence on the selfinductance of the driving coil. The theoretical computation method for the system equivalent inductance is also presented. As for the system equivalent inductance, the simulative result is 83.69μH, and the theoretical result is 99.396μH. These mean that per turn coil's distribution has large influence on the system equivalent inductance under the condition of eddy current. The system equivalent inductance is much lower than the selfinductance of the driving coil. Therefore the system equivalent inductance should be employed to evaluate the factual working parameters of ICL In addition, computation formula for the mutual inductance between the driving coil and the armature are given out.

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Section: A Computation In Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inductance Computation Consideration of Induction Coil Launcher

Zhao¹,

Cheng²,

Zhang³

2008

2008 14th Symposium on Electromagnetic Launch Technology

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“…When Switch 1 is closed, the result is basically an LRC circuit, which can oscillate. This input provides the option to: (0) do nothing and let the circuit ring, (1) crowbar it by closing Switch 2 when the capacitor voltage passes through zero, (2) open Switch 1 at the current null after half a period, (3) open Switch 1 after a full period, or (4) never close Switch 1 so the coil is effectively removed from the gun.…”

Section: A Benchmark Examplementioning

confidence: 99%

“…The Sandia coilgun [1,2,3,4,5] is an inductive electromagnetic launcher. It consists of a sequence of powered, multi-turn coils surrounding a flyway of circular cross-section through which a conducting armature passes.…”

Section: Introductionmentioning

confidence: 99%

SLINGSHOT - a Coilgun Design Code

Marder¹

2001

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“…In recent years, the developments on the power electronics have provided important progress in the area of applications of electromagnetic coil-guns. The multi-stage induction coil-guns among the electromagnetic weapons with different types [1,2] and different working principles [3][4][5][6][7][8][9] might be considered as the guns having greater expectancy in the near future [10][11][12]. In our study, a micro-controller controlled, four stage induction coil-gun with new characteristics has been designed.…”

Section: Introductionmentioning

confidence: 99%