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Mathematical Problems in Engineering
Volume 2014, Article ID 810956, 6 pages
Research Article

Average and Small Signal Modeling of Negative-Output KY Boost Converter in CCM Operation

1State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2Xi’an Institute of Space Radio Technology, Xi’an 710100, China

Received 5 February 2014; Revised 30 March 2014; Accepted 1 April 2014; Published 23 April 2014

Academic Editor: Cristian Toma

Copyright © 2014 Faqiang Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Negative-output KY Boost converter, which can obtain the negative output voltage and could be driven easily, is a good topology to overcome traditional Boost and Buck-Boost converters and it is believed that this converter will be widely used in engineering applications in the future. In this study, by using the averaging method and geometrical technique, the average and small signal model of the negative-output KY Boost converter are established. The DC equilibrium point and transfer functions of the system are derived and analyzed. Finally, the effectiveness of the established model and the correctness of the theoretical analysis are confirmed by the circuit experiment.