By Topic

Modelling and analysis of cascade step-down converters

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Veerachary, M. ; Dept. of Electr. Eng., Indian Inst. of Technol. Delhi, New Delhi, India

Signal flow graph nonlinear modelling of N-cell cascade step-down buck converters is presented. General rules useful for drawing the signal flow graphs are evolved. A systematic procedure for developing a unified flow graph model of the cascade buck converters operating in synchronous control is discussed. A simplified procedure is given to deduce large, small-signal and steady-state models from the unified signal flow graph of the converter. A straightforward algorithm is developed to draw the unified graph model of the N-cell cascade buck converter. The unified nature of the proposed method is discussed by taking illustrative examples. Converter performance expressions, small-signal transfer functions and steady state, are derived taking the two-cell buck converter as an example. A large-signal model is developed and has been programmed in a TUTSIM simulator. Large-signal responses against supply and load disturbances are obtained. The validity of the proposed signal flow graph modelling of the cascade buck converters is verified and compared through PSIM simulator results. A few experimental large-signal responses results are provided to verify the proposed method.

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:152 ,  Issue: 1 )