A 100 kJ Pulse Unit for Electromagnetic Forming of Large Area Sheet Metals

A 10 kJ electromagnetic forming (EMF) modulator with energy recovery based on two resonant power modules, each containing a 4.5 kV/30-kA silicon controlled rectifier, a 1.11-mF capacitor bank and an energy recovery circuit, working in parallel to allow a maximum actuator discharge current amplitude and rate of 50 kA and 2 kA/µs was successfully developed and tested. It can be plugged in standard single phase 230 V/16 A mains socket and the circuit is able to recover up to 32% of its initial energy, reducing the charging time of conventional EMF systems by up to 68%.

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“…maximum current capability of the systems. A 200 kA EMF circuit with three SCRs, each in a parallel branch, is shown in [8].…”

Section: Introductionmentioning

confidence: 99%

Modular High-Current Generator for Electromagnetic Forming With Energy Recovery

Redondo

Jorge

Pereira³

2014

IEEE Trans. Plasma Sci.

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“…Several studies have started from this premise, but most involve situations for deformation of tubular parts by solenoid coils, while few studies have analyzed sheet metal forming by flat spiral coils [1], [3], [4]. The main reason for this limitation is that the electromagnetic forming of flat plates usually involves larger areas than applications of tube forming, thus requiring considerably higher pulse energies [5]. In other words, an EMF system is a discharge circuit (actuator coil) coupled to the metallic plate to be deformed, as showed in Fig.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Electromagnetic Sheet Metal Forming Process

Paese

Rosa²,

Geier

et al. 2014

AMM

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Electromagnetic forming (EMF) is a high-speed forming process that uses energy density of a pulsed magnetic field to deform metallic workpieces. This paper presents a method to calculate the electromagnetic force in thin flat plates using a flat spiral coil as an actuator. The method is based on the Biot-Savart law, and the solution of magnetic induction integral equations is performed inside Matlab®by a numerical method based on discretizing the EMF system in a system of ordinary differential equations that couple the electric and magnetic phenomena. Free bulging experiments and a comparison with Ansoft Maxwell®software are presented demonstrating a good correlation with the proposed implementation.

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“…For high current applications, SCR's are usually stacked in parallel to increase the maximum current. A 100kJ EMF circuit with 3 SCR branches in parallel is shown in [6].…”

Section: Introductionmentioning

confidence: 99%

New solid-state modulator for magnetic forming with energy recovering

Jorge

Pereira

Redondo

2013

2013 19th IEEE Pulsed Power Conference (PPC)

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A 10kJ electromagnetic forming (EMF) modulator with energy recovery based on two resonant power modules, each containing a 4.5kV/30kA SCR, a 1.11 mF capacitor bank and an energy recovery circuit, working in parallel to allow a maximum actuator discharge current amplitude and rate of 50kA and 2kA/µs was successfully developed and tested. It can be plugged in standard single phase 230V/16A mains socket and the circuit is able to recover up to 32% of its initial energy, reducing the charging time of conventional EMF systems by up to 68%.

show abstract

A 100 kJ Pulse Unit for Electromagnetic Forming of Large Area Sheet Metals

Abstract: Magnetoforming of tube or sheet metal parts can significantly extend the range of geometries conceivable with state-of-the-art forming methods. A major advantage is the considerably

Cited by 8 publications

References 3 publications

Modular High-Current Generator for Electromagnetic Forming With Energy Recovery

Modular High-Current Generator for Electromagnetic Forming With Energy Recovery

An Analysis of Electromagnetic Sheet Metal Forming Process

New solid-state modulator for magnetic forming with energy recovering

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