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http://dx.doi.org/10.5207/JIEIE.2008.22.12.029

Dynamic Characteristics Improvement of a Step-Down Chopper Using Load Current Feed-Forward Compensator  

Chun, Ji-Young (아주자동차대학 자동차계열)
Jeon, Kee-Young (중소기업진흥공단)
Chung, Chun-Byung (명지대학교 대학원 전기공학과)
Han, Kyung-Hee (명지대 전기제어정보공학부)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.22, no.12, 2008 , pp. 29-35 More about this Journal
Abstract
In this paper, The author present a load current feed-forward compensator by method that improve voltage controller of Step-down Chopper to get stable output voltage to sudden change of load current. To confirm the characteristics of a presented load current feed-forward compensator compared each transfer function of whole system that load current feed-forward compensator is added with transfer function of whole system that existent voltage controller is included using Mason gains formula in Root locus and Bode diagram. As a result the pole of system is improved, extreme point of the wave and system improves, and size of peak value and phase margin of break frequency in resonance frequency confirmed that is good. Therefore, presented control technique could confirm that reduce influence by perturbation and improves stationary state and dynamic characteristics in output of Step-down Chopper.
Keywords
Feed-Forward; Resonance Frequency;
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