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Related Experiment Videos

Switch mode power supply for microwave heating based on the Boucherot effect.

G E Georghiou1, R Meredith, A C Metaxas

  • 1Department of Engineering, University of Cambridge, United Kingdom.

The Journal of Microwave Power and Electromagnetic Energy : a Publication of the International Microwave Power Institute
|February 25, 2000
PubMed
Summary

A novel self-resonating switch-mode power supply, utilizing the Boucherot effect, offers efficient and precise control for continuous wave (CW) magnetrons. This innovative design provides high efficiency, reduced dissipation, and compact size for magnetron power applications.

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Area of Science:

  • Electrical Engineering
  • Power Electronics
  • Microwave Engineering

Background:

  • Conventional power supplies for continuous wave (CW) magnetrons often exhibit limitations in efficiency and precise power control.
  • The Boucherot effect presents an opportunity for developing novel power supply topologies.
  • Existing microwave oven power supplies lack the precision required for advanced magnetron applications.

Purpose of the Study:

  • To introduce and analyze a new self-resonating switch-mode power supply (SMPS) for driving CW magnetrons.
  • To evaluate the performance of the proposed SMPS across a range of power levels, from 800 W to 40 kW.
  • To compare the new design's characteristics against conventional magnetron power supplies.

Main Methods:

  • Detailed circuit analysis of the self-resonating SMPS based on the Boucherot effect.

Related Experiment Videos

  • Experimental evaluation of the SMPS performance with an 800 W/2450 MHz magnetron.
  • High-power testing of the SMPS driving a magnetron up to 40 kW.

    • Main Results:

    • The new self-resonating SMPS demonstrates low energy dissipation under short-circuit conditions.
    • Achieved low ripple current and voltage waveforms enable precise magnetron control (20-100% rated power).
    • The design offers high efficiencies, reduced size, and lower weight compared to conventional supplies.

    Conclusions:

    • The self-resonating SMPS based on the Boucherot effect is a viable and advantageous alternative for driving CW magnetrons.
    • This topology provides superior performance metrics, including efficiency, control precision, and physical attributes.
    • The developed power supply is suitable for various high-power magnetron applications.