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Optimizing the LLC-LC resonant converter topology for wide-output-voltage and wide-output-load applications

Beiranvand, R ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1109/TPEL.2011.2143429
  3. Publisher: 2011
  4. Abstract:
  5. LLC-LC resonant converter is a suitable circuit topology to design switched-mode power supplies for wide-output-voltage and wide-output-load applications. In this paper, a design procedure is introduced to optimize this converter. Unlike soft switching techniques for pulse width modulated converters, which usually apply an active auxiliary circuit to reduce switching losses and EMI, in the proposed converter, not only such circuits are not used, but also all of the parasitic elements are merged to the converters main components. Zero-voltage switching (ZVS) operation is realized for all power devices under all operating conditions. Thus, this converter is a suitable choice for high-switching-frequency operation. The converter parameters have been designed to minimize the components current and voltage stresses. In addition, the frequency variation range has been reduced in order to use the magnetic components, optimally. Developed prototype of the converter has been tested for different output voltages (25-165 V dc) under different loads (0-3 A dc) and input voltages (320-370 V dc) for being used as ion implanter arc power supply. For regulating and adjusting the designed prototype converter output voltage, its switching frequency varies from 177 to 314 kHz. The converters maximum efficiency is approximately equal to 96.6
  6. Keywords:
  7. LLC-LC resonant converter ; Wide output voltage ; Zero-voltage switching (ZVS) ; Arc power ; Auxiliary circuits ; Design procedure ; Frequency variation ; Input voltages ; Ion implanters ; Magnetic components ; Main component ; Maximum Efficiency ; Operating condition ; Output voltages ; Parasitic element ; Power devices ; Prototype converter ; Pulse width modulated converters ; Resonant converters ; Soft-switching technique ; Switched mode power supplies ; switched-mode power supply (SMPS) ; Switching loss ; Voltage stress ; DC power transmission ; Electric network topology ; Optimization ; Power converters ; Power supply circuits ; Pulse width modulation ; Shape memory effect ; Soft switching ; Standby power systems ; Topology ; Zero voltage switching
  8. Source: IEEE Transactions on Power Electronics ; Volume 26, Issue 11 , 2011 , Pages 3192-3204 ; 08858993 (ISSN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5751702