A Study Of The Magnetic Induction-repulsion Accelerator

Design of a fast linear drive for (hybrid) circuit breakers – Development and validation of a multi domain simulation environment

“…An overview of hybrid switch techniques in general can be found in [2]. The mechanical contact is propelled by a linear drive principle, which consists of a spiral inductor and a copper plate [7][8][9]. Deceleration of the movement is realised by air dampers, which are integrated in the moving parts of drive.…”

First results from an electro-magnetic (EM) drive high acceleration of a circuit breaker contact for a hybrid switch

“…Substitution of all known variables and an estimated q of 20% [5] in (2), results for C, Li and e(O) in approximately 1100 jaF, 6.3 pfH and 2 kV respectively. A pre-charge voltage of 2 kV results in a safety margin related to the maximum value of 3 kV.…”

“…This demand will be realised with an inductor, which induces currents in the movable part of the mechanical switch. Such magnetic techniques are used for decades to accelerate, move or transform conductive objects [5,6,7]. This contribution describes the construction and energising of a flat spiral inductor, which accelerates a DC hybrid circuit-breaker contact of -2 kg.…”

A recoilless electromagnetic launcher for model validation

“…Both theoretical and experimental investigations have demonstrated that when the drive coil has a single turn [10,11] very good energy transfer efficiencies are obtained with low mass projectiles [12], suggesting that there is little wasted energy. Multi-turn drive coils [13,14] are required for heavier projectiles and take the spiral form shown in figure 2 (a).…”