Twenty-Stage Toroidal XRAM Generator Switched by Countercurrent Thyristors

Dedie, P.; Brommer, Volker; Scharnholz, Sigo

doi:10.1109/tps.2010.2055168

Cited by 51 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the coils are discharged into the load (R L , L L ) in parallel connection, which results in the current being multiplied by 2. The amplification factor can be increased with additional stages, as explained in detail elsewhere [7]. At ISL, the development of XRAM generators started with the research on semiconductor switches for inductive pulsed power generators.…”

Section: The Xram Generatormentioning

confidence: 99%

“…XRAM generators with 4, 8 and 20 stages were developed. The focus was on the reliability of the switches and their synchronous switching behavior [6], [7]. Furthermore, a low-energy, 20-stage technology demonstrator was realized in a compact toroidal arrangement with the electronics placed in the vicinity of the coil [7].…”

Section: The Xram Generatormentioning

confidence: 99%

“…The XRAM [3], CMIS [4], or STRETCH meat grinder [5] concepts are current amplifying circuitries which were proposed and applied in this context. At ISL, research has been focusing on XRAM generators for some time [6], [7], and recently we have been able to demonstrate on a laboratory scale that our concept is suitable for driving a small caliber-railgun [8]. The next objective would be to enhance the railgun performance in terms of projectile velocity and mass by using a compact and mobile XRAM generator with much more power.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of XRAM generators as inductive power sources for very high current pulses

Liebfried

Brommer

Scharnholz

2013

2013 19th IEEE Pulsed Power Conference (PPC)

Self Cite

View full text Add to dashboard Cite

For all-electric mobile systems, inductive pulsed power generators represent a very attractive alternative to capacitive generators. This is due to their high energy density, low charging voltage, short charging time and to the fact that they can easily be combined with modern high-power (lithium-ion) batteries. In particular, storage coils embedded in a so-called XRAM circuitry can be used to produce a current pulse, the amplitude of which is a multiple of the charging current supplied by the batteries.In this contribution we summarize the development of XRAM generators at ISL up to now and present some unpublished results. Special emphasis is laid on semiconductor-based opening switches and coils with high energy density. Both are core elements of XRAM generators and have to be designed for very high currents (several tens of kiloamperes).

show abstract

Section: The Xram Generatormentioning

confidence: 99%

Section: The Xram Generatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of XRAM generators as inductive power sources for very high current pulses

Liebfried

Brommer

Scharnholz

2013

2013 19th IEEE Pulsed Power Conference (PPC)

Self Cite

View full text Add to dashboard Cite

show abstract

“…In such a generator, multiple inductance are first connected in series and charged to a certain electric current. After that, all coils are connected in parallel to each other which leads to a summation of the individual currents [8]. For the evaluation of inductive energy storage systems, the inductance ratio can be used [9] which for railgun applications is defined as…”

Section: Introductionmentioning

confidence: 99%

The modular augmented staged electromagnetic launcher operated in the energy storage mode

Roch

Hundertmark

Loffler

et al. 2014

2014 17th International Symposium on Electromagnetic Launch Technology

View full text Add to dashboard Cite

Railguns use electrical energy to accelerate projectiles to large velocities. The electrical energy for the launching process is provided by a pulsed power unit.A pulsed power unit usually consists of a capacitor, a switching device, a crowbar diode and a pulse forming inductance. The pulse forming inductance is necessary to generate an appropriate current pulse length and amplitude.The idea of the energy storage augmented electromagnetic launcher is to use the magnetic field produced by the pulse forming inductance to augment the magnetic field between the rails of the launcher. To maximize the augmentation of the magnetic field, it is necessary to place the pulse forming inductance as close as possible to the rails of the railgun. The additional magnetic field causes not only an increased acceleration of the projectile, but also a larger mechanical load of the railgun structure. This requires a reinforced housing compared to conventional railgun housings.In this paper the design and the experimental setup of a railgun using an energy storage augmentation scheme are presented as well as the results of experiments. The results are compared with previous results of a non-augmented railgun configuration. The comparison shows an improvement of the energy efficiency.

show abstract

“…On the basis of Inverse Current Commutation with Semiconductor devices (ICCOS) [6,7], ISL has developed 8 stages and 20 stages XRAM [6,8,9]. The ICCOS makes sure that the thyristors can be turned off safely while bearing low voltage.…”

Section: Introductionmentioning

confidence: 99%

Comparisons of three inductive pulse power supplies

Chu

2012

2012 16th International Symposium on Electromagnetic Launch Technology

View full text Add to dashboard Cite

The energy density of the inductive energy storage systems is one order of magnitude higher than that of the capacitive ones. Therefore they have potential applications in the future. In this paper, three inductive pulse power supply topologies, i.e. STRETCH meat grinder, XRAM, and non-mutual inductance pulse power supply, are discussed in depth. Firstly, their principles are analyzed. Then simulations are made to illustrate the principles and prepare the fundamental data for further comparisons based on a 4 kA charging current, 220μH total inductance system under the environment of Simplorer ® 8. Five vital indices reflecting their performances from different aspects are proposed in order to ensure objective and comprehensive comparisons. Based on those indices, the advantages and disadvantages are pointed out and some potential improvements are also presented.Index Terms-inductive pulse power supplies, STRETCH meat ginder, XRAM, vital indices, comparisons.

show abstract

Twenty-Stage Toroidal XRAM Generator Switched by Countercurrent Thyristors

Cited by 51 publications

References 16 publications

Development of XRAM generators as inductive power sources for very high current pulses

Development of XRAM generators as inductive power sources for very high current pulses

The modular augmented staged electromagnetic launcher operated in the energy storage mode

Comparisons of three inductive pulse power supplies

Contact Info

Product

Resources

About