Development of a medium-bore high-efficiency helical coil electromagnetic launcher
The design, development, and testing of a medium-bore helical coil electromagnetic launcher (HCEL) that can accelerate a 500-gram mass to 100 m/s with an efficiency of 13.2% is presented and discussed. The HCEL has a bore size of 40 mm and a length of 750 mm. The measured HCEL inductance gradient of...
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| Veröffentlicht in: | IEEE transactions on plasma science 2004-10, Vol.32 (5), p.1893-1895 |
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| container_end_page | 1895 |
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| container_issue | 5 |
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| container_title | IEEE transactions on plasma science |
| container_volume | 32 |
| creator | Engel, T.G. Nunnally, W.C. Neri, J.M. |
| description | The design, development, and testing of a medium-bore helical coil electromagnetic launcher (HCEL) that can accelerate a 500-gram mass to 100 m/s with an efficiency of 13.2% is presented and discussed. The HCEL has a bore size of 40 mm and a length of 750 mm. The measured HCEL inductance gradient of 150 mH/m is more than a 100 times larger than a conventional railgun. The HCEL is powered by a sequentially fired pulse forming network consisting of four 15-kJ electrolytic capacitor banks. Typical PFN V-I characteristics are approximately 15-kA peak current at 550 V for 8-ms pulse length. A computer model of the HCEL launcher is constructed in PSPICE and accurately predicts launcher performance within 25%. Theoretical and numerical predictions of launcher performance are compared with experimental measurements, including projectile velocity, launcher voltage, launcher current, and inductance gradient. |
| doi_str_mv | 10.1109/TPS.2004.835487 |
| format | Article |
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The HCEL has a bore size of 40 mm and a length of 750 mm. The measured HCEL inductance gradient of 150 mH/m is more than a 100 times larger than a conventional railgun. The HCEL is powered by a sequentially fired pulse forming network consisting of four 15-kJ electrolytic capacitor banks. Typical PFN V-I characteristics are approximately 15-kA peak current at 550 V for 8-ms pulse length. A computer model of the HCEL launcher is constructed in PSPICE and accurately predicts launcher performance within 25%. 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The HCEL has a bore size of 40 mm and a length of 750 mm. The measured HCEL inductance gradient of 150 mH/m is more than a 100 times larger than a conventional railgun. The HCEL is powered by a sequentially fired pulse forming network consisting of four 15-kJ electrolytic capacitor banks. Typical PFN V-I characteristics are approximately 15-kA peak current at 550 V for 8-ms pulse length. A computer model of the HCEL launcher is constructed in PSPICE and accurately predicts launcher performance within 25%. Theoretical and numerical predictions of launcher performance are compared with experimental measurements, including projectile velocity, launcher voltage, launcher current, and inductance gradient.</description><subject>Accelerators and propulsion</subject><subject>Boring</subject><subject>Capacitors</subject><subject>Coils</subject><subject>Design engineering</subject><subject>Electrical equipment</subject><subject>Electromagnetic launching</subject><subject>Electromagnetic measurements</subject><subject>Electromagnetism</subject><subject>Exact sciences and technology</subject><subject>Inductance measurement</subject><subject>Ion and plasma propulsion</subject><subject>Life estimation</subject><subject>Physics</subject><subject>Physics of gases, plasmas and electric discharges</subject><subject>Physics of plasmas and electric discharges</subject><subject>Plasma devices</subject><subject>Predictive models</subject><subject>Railguns</subject><subject>Testing</subject><issn>0093-3813</issn><issn>1939-9375</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkMlKBDEQQIMoOC5nD14aQW89Jqn0kqO4g6C4nEMmXXEi6c6YdAv-vRlGEDwUdahX2yPkiNE5Y1Sevz69zDmlYt5CJdpmi8yYBFlKaKptMqNUQgktg12yl9IHpUxUlM_I8xV-oQ-rHoexCLbQRY-dm_pyESIWS_e-LNFaZxwO5rtYondG-8IE5wv0aMYYev0-4OhM4fU0mCXGA7JjtU94-Jv3ydvN9evlXfnweHt_efFQGpAwlpI1rK2xqyyvAZDRDurW6gYX3AJ2rO0WrOuaBYeqszlqzQXWVNaaCZE_hn1ytpm7iuFzwjSq3iWD3usBw5QUb3kras4zePIP_AhTHPJtismKNWs3GTrfQCaGlCJatYqu1_FbMarWglUWrNaC1UZw7jj9HatTlmKjHoxLf23r1QB15o43nEPEvzKIhgsGP5_Agzs</recordid><startdate>20041001</startdate><enddate>20041001</enddate><creator>Engel, T.G.</creator><creator>Nunnally, W.C.</creator><creator>Neri, J.M.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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The HCEL has a bore size of 40 mm and a length of 750 mm. The measured HCEL inductance gradient of 150 mH/m is more than a 100 times larger than a conventional railgun. The HCEL is powered by a sequentially fired pulse forming network consisting of four 15-kJ electrolytic capacitor banks. Typical PFN V-I characteristics are approximately 15-kA peak current at 550 V for 8-ms pulse length. A computer model of the HCEL launcher is constructed in PSPICE and accurately predicts launcher performance within 25%. Theoretical and numerical predictions of launcher performance are compared with experimental measurements, including projectile velocity, launcher voltage, launcher current, and inductance gradient.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TPS.2004.835487</doi><tpages>3</tpages></addata></record> |
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| subjects | Accelerators and propulsion Boring Capacitors Coils Design engineering Electrical equipment Electromagnetic launching Electromagnetic measurements Electromagnetism Exact sciences and technology Inductance measurement Ion and plasma propulsion Life estimation Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges Plasma devices Predictive models Railguns Testing |
| title | Development of a medium-bore high-efficiency helical coil electromagnetic launcher |
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