Conference Paper

Comparison of methods for the analysis of the parallel resonant converter with capacitive output filter

Friedrich-Alexander-Univ. Erlangen-Nuremberg, Erlangen
DOI: 10.1109/EPE.2007.4417323 Conference: Power Electronics and Applications, 2007 European Conference on
Source: IEEE Xplore

ABSTRACT Several different approaches for the investigation of the steady-state properties of resonant converters have been published to date. In addition to solving the occurring equations in the time domain, which turns out to be quite cumbersome, the designer can make use of approximate approaches in the frequency domain. Two of these methods are compared to the exact solution with regard to their accuracy and mathematical complexity within this paper for the parallel loaded resonant LC converter with capacitive output filter. Some practical aspects are discussed by means of measured voltage conversion ratios.

0 Bookmarks
 · 
41 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: When driving constant voltage loads that call for the stabilization of the output current, rather than output voltage, the use of topologies that have an output current sourcing behavior could be advantageous. This study proposes and analyses a one-stage, zero current switched, high voltage gain current sourcing converter to drive such a load. The topology is based on the parallel resonant converter, but includes blocking diodes at the input bridge to assist the soft switching operation. The results of the theoretical analysis were used to develop large and small signal behavior models. The behavior of the proposed converter was tested experimentally on a 1.3kW prototype, which was fed from a low voltage source in the range of 20V to 32V. The circuit was controlled by dsPIC30F2020 (Microchip, USA). Good agreement was found between the theoretical predications and the experimental results.
    Electrical & Electronics Engineers in Israel (IEEEI), 2012 IEEE 27th Convention of; 01/2012
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A high efficient LLCC-type resonant dc-dc converter is discussed in this paper for a low-power photovoltaic application. Emphasis is put on the different design mechanisms of the resonant tank. At the same time soft switching of the inverter as well as the rectifier bridge are regarded. Concerning the design rules, a new challenge is solved in designing a LLCC-converter with voltage-source output. Instead of the resonant elements, ratios of them, e.g. the ratio of inductances L<sub>s</sub>/L<sub>p</sub> is considered as design parameters first. Furthermore, the derived design rule for the transformer-inductor device fits directly into the overall LLCC-design. Due to the nature of transformers, i.e. the relation of the inductances L<sub>s</sub>/L<sub>p</sub> is only a function of geometry, this design parameter is directly considered by geometry. Experimental results demonstrate the high efficiency.
    Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE; 03/2010
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The use of topologies that have an output current sourcing behavior could be advantageous when driving constant voltage loads that call for the stabilization of the output current rather than output voltage. The load characteristic of the magnetron considered in this study can be modeled as a voltage source of about 3.9 kV with a relatively small internal resistance of about 1.5 kOhm that needs to be driven by a current of about 300 mA. This study proposes a one-stage, zero current switched, high voltage gain, and current sourcing converter, to drive such a load. The topology is based on the parallel resonant converter but includes blocking diodes at the input bridge to assist the soft switching operation. The theoretical analyses were verified by simulations and experimentally on a 1.3 kW magnetron driver which was fed from a low voltage source in the range of 20 V to 32 V. The circuit was controlled by dsPIC30F2020 (Microchip, USA) in closed loop.
    Applied Power Electronics Conference and Exposition (APEC), 2011 Twenty-Sixth Annual IEEE; 04/2011