NDLI: Thyristor triggering by coil zero-current crossing detection in a magnetic stimulator for living tissues

Content Provider	IEEE Xplore Digital Library
Author	de Sauvage, R.C. Dondon, P. Veyret, B. Lagroye, I.
Copyright Year	2011
Description	Author affiliation: IMS, UMR 5218, ENSCBP 16 av Pey-Berland 33607 Pessac, France (de Sauvage, R.C.; Veyret, B.; Lagroye, I.) \|\| ENSEIRB-MATMECA 351 cours libération & 1 av Dr Schweitzer, 33405 Talence, France (Dondon, P.)
Abstract	This paper describes the design of a zero-current crossing detection circuit for a high-power (650 V, 6000 A) magnetic generator [1]. The magnetic pulses are produced by discharging a capacitor C into a coil in resonant mode via thyristors and are used to stimulate living tissues. The generator delivers short (340 μs), high-intensity 2 Tesla magnetic pulses. Half-sine or full-sine waveforms are available. When full-sine current into the coil is selected, a smooth transition between the 2 half-sines is required: the second thyristor must be triggered shortly before the first one switches off to ensure continuity in tissue excitation. The period of the resonant circuit is computed in advance, irrespective of interchangeable coil inductance and damping factors. The system core consists of a toroid sensor encircling the high-current main wire of the coil associated with an integrator circuit. The detection of three main events: the starting time and zero-crossing time of the sensor voltage and the zero-crossing time of the potential across C, makes it possible to detect the pulse period right from the beginning of the second quarter period. Electronic design and validation tests are presented in section II. The results and possible improvements are discussed in the final section.
Starting Page	474
Ending Page	477
File Size	565854
Page Count	4
File Format	PDF
ISBN	9781612841359
e-ISBN	9781612841373
DOI	10.1109/NEWCAS.2011.5981322
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-26
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Thyristors Magnetic circuits Magnetomechanical effects Damping Toroidal magnetic fields Capacitors
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in