Design and Operation of Resonant LLC Converter for EV Applications using PLECS Simulation

To ensure power supply and meet the performance standards, for line and load transients it is crucial to model the control loop of power supplies. However power supply designers often lack a signal model for the LLC converter in their toolkit. This becomes more challenging with the increasing demand for efficiency. In cases the power supply needs to achieve an efficiency of 96% while maintaining a low THD and a good pf. Such requirements place pressure on the DC DC stage to achieve efficiencies above 96%. The resonance LLC converters are a choice due to their ability to attain high efficiencies. Unfortunately working with this topology has been made difficult by the absence of a user small signal model. This paper strives to address these challenges by providing a signal model, for the LLC converter and offering tools that can be applied in various operating scenarios. These resources aim to assist power supply designers in optimizing their designs.