# Parameter Optimization of LLC-Converter with multiple operation points using Reinforcement Learning

## TL;DR

This paper presents a reinforcement learning approach to optimize LLC converters at multiple operation points, achieving high efficiency and rapid tuning, thus enhancing power electronics design processes.

## Contribution

It introduces a RL-based method for multi-point LLC converter optimization, enabling fast, adaptable, and efficient design solutions compared to traditional methods.

## Key findings

- RL agent learns optimization policy during training
- Achieves >90% efficiency at two operation points
- Solves new problems within 50 tuning steps

## Abstract

The optimization of electrical circuits is a difficult and time-consuming process performed by experts, but also increasingly by sophisticated algorithms. In this paper, a reinforcement learning (RL) approach is adapted to optimize a LLC converter at multiple operation points corresponding to different output powers at high converter efficiency at different switching frequencies. During a training period, the RL agent learns a problem specific optimization policy enabling optimizations for any objective and boundary condition within a pre-defined range. The results show, that the trained RL agent is able to solve new optimization problems based on LLC converter simulations using Fundamental Harmonic Approximation (FHA) within 50 tuning steps for two operation points with power efficiencies greater than 90%. Therefore, this AI technique provides the potential to augment expert-driven design processes with data-driven strategy extraction in the field of power electronics and beyond.