Experiments and theoretical calculation of explosive-driven shock wave ferromagnetic generators

WU Jun-ying; CHEN Lang; FENG Chang-gen

doi:10.11883/1001-1455(2007)05-0398-07

Volume 27 Issue 5

Oct. 2014

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Liu Yuan, Pang Baojun, Chi Runqiang, Cao Wuxiong, Zhang Zhiyuan. Wavelet transformation based damage feature extraction ofhypervelocity impact acoustic emission signalon honeycomb core sandwich[J]. Explosion And Shock Waves, 2017, 37(5): 785-792. doi: 10.11883/1001-1455(2017)05-0785-08

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WU Jun-ying, CHEN Lang, FENG Chang-gen. Experiments and theoretical calculation of explosive-driven shock wave ferromagnetic generators[J]. Explosion And Shock Waves, 2007, 27(5): 398-404. doi: 10.11883/1001-1455(2007)05-0398-07

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Experiments and theoretical calculation of explosive-driven shock wave ferromagnetic generators

doi: 10.11883/1001-1455(2007)05-0398-07

1.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

Publish Date: 2007-09-25

Abstract

Abstract

Two types of ferromagnetic generators were designed. For one type, a cylinder Nd2Fe14B rare-earth permanent magnet was used as working body, and a plane shock wave forms the detonation of the explosives moved in the cylinder along the direction of its axis. For the other type, a ring Nd2Fe14B magnet was charged with high energy explosive in the center hole, and the explosives were initiated with two ends at the same time. The initial magnetic flux distribution of the Nd2Fe14B magnet was simulated by the Maxwell 3D code of the electromagnetic analysis software. The calculating method of the electromotive force from the ferromagnetic generators was given. The detonation tests of generators were carried out. The output current and voltage of generators were measured. The shock wave velocity in Nd2Fe14B magnet was measured. The results show that the ferromagnetic generators designed are capable of producing a high current pulse of up to 1 212 A, with the width of 78.3 s, and the electromotive force obtained is about 67 V/turn.
- mechanics of explosion,
- pulse power technology,
- explosive demagnetization,
- rare-earth magnets,
- shock wave

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