Loading...

Small-signal modeling and fast response control strategy for DCVM Cúk converters in PFC applications.انجام شد

Nasirian, V. R ; Sharif University of Technology

1048 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/APEC.2011.5744840
  3. Abstract:
  4. Cúk Converter operating in discontinuous capacitor voltage mode is an inherent PFC converter in which, unity power factor can be achieved using constant duty cycle and switching frequency. In this paper, a reduced-order switch network modeling technique is applied to Cúk converter operating in DCVM in order to derive small-signal model of the converter assuming a dc voltage source as the input source of the converter. This model is extended to derive the small-signal behavior of the converter while operating as a PFC converter. The validity of the proposed model is confirmed by both simulation and experimental results. Afterwards, a new control strategy is proposed in which switching frequency is a function of load effective resistance. This control strategy considerably improves transient response of the converter to load variations besides stabilizing voltage stress on semiconductor switches. Experimental results are presented to demonstrate the features of proposed control algorithm
  5. Keywords:
  6. Cuk converter ; Discontinuous Capacitor Voltage Mode (DCVM) ; PFC converters ; Small-signal model ; Switching frequency control strategy ; Capacitor voltages ; Control algorithms ; Control strategies ; DC voltage sources ; Duty cycles ; Fast response ; Load variations ; PFC applications ; Reduced order ; Small signal ; Small signal model ; Small-signal modeling ; Switch network ; Transient response ; Unity power factor ; Voltage stress ; Algorithms ; Capacitors ; Computer simulation ; DC power transmission ; Electric power factor ; Electric switchgear ; Power electronics ; Power quality ; Switching circuits ; Switching frequency ; Heterojunction bipolar transistors
  7. Source: Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC ; 2011 , Pages 1795-1802 ; 9781424480845 (ISBN)
  8. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5744840