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Hybrid Modeling and Control of DC-DC Series Resonant Converters for Applications of Wide Range Power

Afshang, Hamid | 2016

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 49043 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Tahami, Farzad
  7. Abstract:
  8. The subject of control and stabilization of dc-dc series resonant converter (SRC) is still a challenge in power electronics. The conventional controller design and stability analysis for this converter are based on the model which is derived using the sinusoidal approximation and averaging followed by linearization about an operating point. This model is not applicable to a SRC that operates below resonance especially in discontinuous conduction mode (DCM) because the sinusoidal approximation is no longer acceptable. However, a SRC may be purposely designed to operate in DCM. Therefore, it is essential to investigate the stability analysis and controller design using a more sophisticated model. In this work, a novel hybrid control strategy for the SRC operating below resonance is presented. Stability analysis of the closed-loop system is systematically performed by solving some linear matrix inequalities. This hybrid control approach has simple hardware implementation which does not require fast sampling of the resonant tank waveforms and external frequency modulator. A prototype of the SRC is constructed and the hybrid controller is realized on a TMS320F2812 DSP core. The simulation and experimental results show the effectiveness of the proposed modeling and control method
  9. Keywords:
  10. Voltage Controlled Oscillator ; Dual Bridge Series Resonant Converter ; Piecewise Affine System ; Hybrid Control ; Direct Current to Direct Current (DC to DC)Converters ; Discontinuous Conduction

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