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This note is a kind of "icing on the cake" for a series of publications devoted to the analytical study of the properties of electromagnetic accelerators of ferromagnetic bodies. It is dedicated to a special case of a coilgun built according to the "traveling wave" scheme. The characteristics of such an accelerator in terms of the efficiency and velocity of the projectile are analyzed.

Coilgun calculations | Views: 240 | Added by: Eugen | Date: 06.07.2022 | Comments (0)

The analysis of the data on multistage coilguns collected in the Table of Accelerators by January 1, 2022 was carried out. The high informativeness of the parameter G in terms of characterizing the quality of accelerators was confirmed.

Coilgun calculations | Views: 293 | Added by: Eugen | Date: 10.01.2022 | Comments (0)

A new criterion for evaluating the quality of multistage reluctance accelerators is proposed - G-factor. The filling of the corresponding table has begun, which should include information on all currently available coilguns to calculate the corresponding G value.

Coilgun calculations | Views: 304 | Added by: Eugen | Date: 09.12.2021 | Comments (0)

With the help of analytical calculcations for energies and velocities given in this section, a relation obtained for maximum achievable velocity of a projectile and efficiency of a multistage electromagnetic accelerator with fixed length and energy capacity.

Coilgun calculations | Views: 542 | Added by: Eugen | Date: 01.12.2021 | Comments (0)

With the help of analytical estimates for fields and forces derived in this section, the relations for coilguns are obtained, in particular:

- the maximum energy values acquired by an (infinitely long) projectile during acceleration are estimated;

- graphical dependences of the optimal values of dimensions of the accelerating coils (for a fixed length of the projectile) and the length of the projectile (for a fixed geometry of the coil) for the development of maximum speed and efficiency are obtained;

- the ratio for the accelerating force acting on an infinitely thin projectile is obtained, and on its basis the type of force for a projectile of an arbitrary cross-section shape is determined;

- the maximum possible velocity of the accelerated body in a single-stage accelerator with a fixed power is estimated.

Coilgun calculations | Views: 507 | Added by: Eugen | Date: 27.08.2021 | Comments (0)

A basic component of any electromagnetic coil-based launcher will be described here - the coil itself. The section will be formed by short publications placed on separate pages - they will discuss the features of the windings concerning electromagnetic launching issues, such as driving force on a ferromagnetic, acceleration efficiency etc.

Coilgun calculations | Views: 668 | Added by: Eugen | Date: 23.05.2020 | Comments (0)

An equation for output projectile velocity in an accumulator-driven reluctance launcher is derived. Influence of an internal accu resistance is investigated. Comparison with experimental results is given.

Coilgun calculations | Views: 643 | Added by: Eugen | Date: 29.07.2019 | Comments (0)

Limitations for the speed achievable in a reluctance coilgun commutated by thyristors are investigated based on geometrical properties of the accelerating coils. Thermal, and  also capacitor weight and ESR issues are taken into account.

 

 

Coilgun calculations | Views: 585 | Added by: Eugen | Date: 04.04.2019 | Comments (0)

A process of capacitor charging through a resistor from a consstant voltage source is investigated. A strong dependence on relation of initial voltage on the cap to the source voltage is demonstrated.

Coilgun calculations | Views: 553 | Added by: Eugen | Date: 23.01.2019 | Comments (0)

Limitations for velocity of projectile are investigated for a multistage reluctance accelerator having identical coils. Geometrical parameters of winding are used as basis, assuming an overdamped system fed from large common capacitance.

Coilgun calculations | Views: 902 | Added by: Eugen | Date: 12.11.2018 | Comments (0)

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