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Control of three-phase single-stage isolated buck+boost unity power factor rectifier for unbalanced input voltages

Mohammadpour, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. A single-stage structure is proposed for realizing a unity power factor three-phase isolated AC-DC converter for telecommunication power supply modules. This structure is composed by integrating a boost converter to the isolated threephase three-switch buck rectifier. Modified space vector modulation method is applied to the three-phase three-switch isolated unity power factor input buck rectifier based on the space vector modulation for non-isolated buck. The output boost switch operates during heavily unbalanced mains conditions. Input currents are sinusoidal and in phase with the input voltages even for heavily unbalanced input voltages, e.g. loss of one phase. The converter is modeled by a DC-DC equivalent circuit. This model is used for controller design in a multi-loop control structure. The structure is verified by numerical simulation of a 6kW, 380V/48Vdc designed example
  4. Keywords:
  5. Ac-dc converters ; Boost converter ; Boost switch ; Controller designs ; In-phase ; Input current ; Input voltages ; Multi-loop control ; Numerical simulation ; Single stage ; Space vector modulation ; Space vector modulation method ; Telecommunication power supplies ; Three phase ; Unbalanced input voltage ; Unity power factor ; Unity power factor rectifier ; Computer simulation ; Controllers ; Electric power factor correction ; Electric power measurement ; Electric power systems ; Energy conversion ; Power converters ; Vector spaces ; Electric rectifiers
  6. Source: 2009 International Conference on Electric Power and Energy Conversion Systems, EPECS 2009, 10 November 2009 through 12 November 2009 ; 2009 ; 9789948427155 (ISBN)
  7. URL: http://ieeexplore.ieee.org/document/5415745