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Variable Power, Short Microwave Pulses Generation using a CW MagnetronSURDUCAN, V. , SURDUCAN, E. , CIUPA, R.
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Continuous Wave Magnetron, Pulse Width Modulation, Zero Voltage Switching, Microcontroller, Microwave Pulse Modulation
surducan(6), patent(4), microwave(4), medical(4), magnetron(4), bessyo(4)
Blue keywords are present in both the references section and the paper title.
About this article
Date of Publication: 2011-05-30
Volume 11, Issue 2, Year 2011, On page(s): 49 - 54
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2011.02008
Web of Science Accession Number: 000293840500008
SCOPUS ID: 79958794001
Fine control of microwave power radiation in medical and scientific applications is a challenging task. Since a commercial Continuous Wave (CW) magnetron is the most inexpensive microwave device available today on the market, it becomes the best candidate for a microwave power generator used in medical diathermy and hyperthermia treatments or high efficiency chemical reactions using microwave reactors as well. This article presents a new method for driving a CW magnetron with short pulses, using a modified commercial Zero Voltage Switching (ZVS) inverter, software driven by a custom embedded system. The microwave power generator designed with this method can be programmed for output microwave pulses down to 1% of the magnetron's power and allows microwave low frequency pulse modulation in the range of human brain electrical activity, intended for medical applications. Microwave output power continuous control is also possible with the magnetron running in the oscillating area, using a dual frequency Pulse Width Modulation (PWM), where the low frequency PWM pulse is modulating a higher resonant frequency required by the ZVS inverter's transformer. The method presented allows a continuous control of both power and energy (duty-cycle) at the inverter's output.
|References|||||Cited By «-- Click to see who has cited this paper|
| V. Surducan, E. Surducan, R. Ciupa, "Medical and scientific apparatus with microwave thermal and non-thermal effect", Nonconventional Technology Review, Nr. 1, pp. 42-49, 2010.
 P. Vecchia, R. Matthes, G. Zieglerberger, J. Lin, R. Saunders, A. Zwerdlow, "Exposure to high frequency electromagnetic fields, biological effects and health consequences (100KHz-300GHz)" pp.4, ICNIRP 16/2009
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 E. Miyata, S. Hishikawa, K. Matsumoto, M. Nakaoka, D. Bessyo, K. Yasui, I. Hirota, H. Omori, "Quasi-resonant ZVS PWM Inverter-fed DC-DC Converter for Microwave Oven and its Input Harmonic Current Evaluations", Industrial Electronics Society, 1999. IECON '99 Proceedings. The 25th Annual Conference of the IEEE
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[CrossRef] [Web of Science Record] [SCOPUS Times Cited 3]
 M. Ishitobi, S. Moisseev, L. Gamage, M. Nakaoka, D. Bessyo, H. Omori, "Pulse Width and Pulse Frequency Modulation Pattern Controlled ZVS Inverter Type AC-DC Power Converter with Lowered Utility AC Grid Side Harmonic Current Components for Magnetron Drive", Power Electronic Specialists Conference, Cairns, Qld., Australia, pp 2062-2066, IEEE 2002
 V. Surducan, E. Surducan, R. Ciupa, M. Roman, "Embedded system controlling microwave generators in hyperthermia and diathermy medical devices", IEEE International Conference on Automation, Quality and Testing, Robotics 2010, pp.366-371, ISBN978-1-4244-6722-8, Cluj-Napoca, Romania,
[CrossRef] [SCOPUS Times Cited 12]
 R. Black, "Zero error-1second timing"
 IEC60601-1-4, Medical electrical equipment, Part 1-4: General requirements for safety. Programmable medical electrical systems.
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