Simulink Simulation of Open-Loop Bidirectional Wireless Power Transfer System

An open-loop bidirectional wireless power transfer system operates based on resonant coupling principles, where high-frequency alternating magnetic fields enable contactless energy transmission. Building a Simulink simulation model for this system allows intuitive analysis of its dynamic characteristics under open-loop control and validates the feasibility of bidirectional energy flow. The system typically consists of transmitter and receiver units, both incorporating resonant coils and high-frequency inverter circuits. Open-loop control implies the system operates with preset parameters without real-time feedback regulation, demanding stricter requirements for coil parameter matching and frequency stability. The Simulink simulation can focus on observing the impact of resonant frequency deviation on transmission efficiency and power fluctuation characteristics during reverse energy transfer. Key implementation considerations in the simulation include modeling coil coupling coefficients, approximating losses in high-frequency switching devices, and implementing bidirectional energy switching logic. By comparing transmission efficiency curves under different load conditions, the system's practicality in scenarios like bidirectional battery charging can be verified. Code implementation aspects involve using Simulink's Power Systems library to model LC resonant networks, implementing MOSFET/IGBT-based inverter bridges with appropriate gate driving logic, and designing unidirectional/bidirectional power flow control through switch timing modulation. The simulation should incorporate parameter sweep analysis to optimize coil alignment and frequency tuning for maximum efficiency.