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Fixed structure compensator design using a constrained hybrid evolutionary optimization approach.

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  • 1Electrical Engineering, NIT Raipur, India.

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Summary
This summary is machine-generated.

This study introduces an efficient method for designing DC-DC converter compensators using a hybrid Particle Swarm Optimization (PSO) and local search approach. The technique optimizes compensator parameters to meet frequency domain specifications, improving converter performance.

Keywords:
Compensator designDC−DC power convertersHooke Jeeves methodLoop bandwidthOp-amp non-idealitiesParticle swarm optimization

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Area of Science:

  • Electrical Engineering
  • Control Systems Engineering

Background:

  • DC-DC converters are crucial for power management.
  • Current mode control architectures require effective compensator design for stability and performance.
  • Traditional compensator design methods face challenges with nonlinear optimization problems and achieving high loop bandwidth.

Purpose of the Study:

  • To develop an efficient and robust technique for designing fixed-order compensators for DC-DC converter current mode control.
  • To formulate the compensator design as a global optimization problem solvable by hybrid evolutionary algorithms.
  • To incorporate operational amplifier (op-amp) dynamics and determine optimal op-amp bandwidth for enhanced performance.

Main Methods:

  • A hybrid evolutionary optimization approach combining Particle Swarm Optimization (PSO) and local search.
  • Formulating compensator design as a parameterization-independent global optimization problem.
  • Incorporating op-amp dynamics into the design process and determining achievable loop bandwidth.

Main Results:

  • The proposed hybrid optimization effectively solves the nonlinear compensator design problem.
  • The method achieves desired frequency domain specifications for DC-DC converters.
  • Experimental validation on a peak current mode control DC-DC buck converter confirms the approach's effectiveness.

Conclusions:

  • The hybrid PSO-based optimization offers an efficient and reliable method for fixed-order compensator design in current mode controlled DC-DC converters.
  • The approach successfully addresses limitations in achieving high loop bandwidth by optimizing compensator and op-amp parameters.
  • This technique provides a practical solution for enhancing the performance and stability of DC-DC converters.