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Subharmonics and chaos in a controlled switched-mode power converter

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2 Author(s)
D. C. Hamill ; Dept. of Electron. & Electr. Eng., Surrey Univ., Guildford, UK ; D. J. Jeffries

A difference equation is derived for the output current, at successive switch events, of a simple switching-regulator DC/DC converter using a pulsewidth modulator. Wideband feedback control of the nonlinear circuit leads to a one-dimensional return map of zigzag form from which a stability criterion is found. Operation in the unstable region is described and verified by numerical simulation. The system exhibits a noisy bifurcation, chaos and subharmonics

Published in:

IEEE Transactions on Circuits and Systems  (Volume:35 ,  Issue: 8 )