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  3. Dynamic model development and variable switching-frequency control for DCVM Cúk converters in PFC applications
Dynamic model development and variable switching-frequency control for DCVM Cúk converters in PFC applications
1169 viewed

Dynamic model development and variable switching-frequency control for DCVM Cúk converters in PFC applications

Nasirian, V

Dynamic model development and variable switching-frequency control for DCVM Cúk converters in PFC applications

Nasirian, V ; Sharif University of Technology | 2013

1169 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/TIA.2013.2265073
  3. Publisher: 2013
  4. Abstract:
  5. A Cúk converter operating in discontinuous capacitor voltage mode (DCVM) is an inherent power factor correction converter. A reduced-order switch-network model of a Cúk converter in DCVM is developed, which is valid for both dc-dc and ac-dc applications. The model can be used for controller analysis and design. Moreover, a fast dynamic response controller is proposed, which is an integration of a switching-frequency control unit and a proportional-integral (PI) controller. The PI controller is in charge of duty ratio adjustment. In the proposed controller, unlike conventional PI controllers, switching frequency is no longer fixed and varies as load changes. The switching-frequency control unit reacts much faster than the PI controller and instantly compensates for the output voltage in case of drastic load change, thus significantly improving the transient response. Furthermore, the proposed control scheme keeps the switch voltage stress constant, which eases switch selection and improves converter reliability
  6. Keywords:
  7. Cúk converter ; Discontinuous capacitor voltage mode (DCVM) ; Power factor correction (PFC) ; Capacitor voltages ; Controller analysis ; Conventional-PI controller ; Fast dynamic response ; Power factor correction converters ; Power factor corrections ; Proportional integral controllers ; Small signal model ; Capacitors ; Dynamic response ; Electric power factor ; Controllers
  8. Source: IEEE Transactions on Industry Applications ; Volume 49, Issue 6 , 2013 , Pages 2636-2650 ; 00939994 (ISSN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6521352