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Design of a bridgeless PFC with line-modulated fixed off-time current control and zero-voltage switching

Haghi, R ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/PECON.2010.5697569
  3. Abstract:
  4. In this paper, the Line-Modulated Fixed Off-Time method is used as the current control strategy for a Power Factor Corrector (PFC) pre-regulator. A zero voltage switching PWM (ZVS-PWM) auxiliary circuit is configured to perform ZVS in the switches. Soft commutation of the main switch is achieved without additional current stress. A significant reduction in the total conduction loss is achieved, since the circulating current for the soft switching flows only through the auxiliary circuit and a minimum number of switching devices are involved in the circulating current path .The proposed rectifier uses a single converter instead of the conventional configuration composed of a four-diode front-end rectifier followed by a boost converter. A 250W, with an input ac voltage of 90-265 Vrms, output voltage of 400 Vdc and switching frequency of 100 kHz is designed and simulated to verify the system performance
  5. Keywords:
  6. Bridgeless rectifier ; Zerovoltage-switching (ZVS) ; Ac voltage ; Auxiliary circuits ; Boost converter ; Circulating current ; Conduction loss ; Continuous conduction mode ; Current control ; Current control strategy ; Current stress ; Line modulation ; Output voltages ; Power factor correctors ; Power-factor correction ; Pre-regulator ; Soft commutation ; Switching devices ; ZVS-PWM ; DC-DC converters ; Electric current control ; Electric inverters ; Electric power factor ; Soft switching ; Zero voltage switching ; Electric rectifiers
  7. Source: PECon2010 - 2010 IEEE International Conference on Power and Energy, 29 November 2010 through 1 December 2010 ; 2010 , Pages 129-134 ; 9781424489466 (ISBN)
  8. URL: http://ieeexplore.ieee.org/abstract/document/5697569