NDLI: Multistage Marx with parallel active droop compensation for long pulses

Content Provider	IEEE Xplore Digital Library
Author	Yeckel, C. Cassel, R. Stangenes, M.
Copyright Year	2015
Description	Author affiliation: Stangenes Ind., Palo Alto, CA, USA (Yeckel, C.; Cassel, R.; Stangenes, M.)
Abstract	Research and development of a parallel boost network providing droop compensation for long pulse applications has reached a milestone at Stangenes Industries. The demonstration unit is capable of producing a 3.2 kV / 3.2 A pulse that persists for 3.6 ms with a stability of better than 1%. The pulse is generated by two modular stages oriented in a Marx topology with a parallel droop compensator stage. The system is meant as an integration option for an existing 30-stage, 3.8 MW Marx-modulator. The option allows for longer pulse lengths that require the reliability and flexibility inherent in solid-state switching modulators. The parallel boost stages float at the voltage of the existing Marx stages and utilize the same charging and auxiliary power networks. In this arrangement, two 30 μF boost capacitors charge in series and discharge in parallel through a 3 mH boost inductor to deliver energy to two parallel 30 μF discharge capacitors during the pulse. The maximum repetition-rate of the system is governed by the charging power available. The demonstration unit is capable of 0.25 Hz operation with the 30W charging power available; however its parent system operates reliably at up to 400 HZ with 100 μs maximum pulse lengths at 90 kV / 50 A delivering 130 kW of average power. The parent system utilizes 30 modular stages [1]. Generating voltage stability of less than 1% requires significant tuning of the feedback network located on each boost stage. Evidence suggests that the droop percentage improves with an increasing number of Marx stages if certain ripple interference strategies are implemented. Improvements to the logic on the next generation boost control card will lead to greater control over the droop parameters.
Starting Page	1
Ending Page	3
File Size	933927
Page Count	3
File Format	PDF
e-ISBN	9781479984039
DOI	10.1109/PPC.2015.7296970
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inductors Modulation Discharges (electric) Capacitors Threshold voltage Monitoring Circuit stability
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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