###### Abstract  
Wireless power transfer (WPT) technology is a contactless wireless energy transfer method with wide-ranging applications in fields such as smart homes, the Internet of Things (IoT), and electric vehicles. Achieving optimal efficiency in wireless power transfer systems has been a key research focus. In this paper, we propose a tracking method based on full current mode impedance matching for optimizing wireless power transfer efficiency. This method enables efficiency tracking in WPT systems and seamless switching between continuous conduction mode and discontinuous mode, expanding the detection capabilities of the wireless power transfer system. MATLAB was used to simulate the proposed method and validate its feasibility and effectiveness. Based on the simulation results, the proposed method ensures optimal efficiency tracking in wireless power transfer systems while extending detection capabilities, offering practical value and potential for widespread applications. wireless power transfer; full current mode; efficiency tracking; efficiency detection; MATLAB simulation 202424291720242429172024291720242917  
instability [15]. Additionally, active impedance matching methods require a trade-off between power loss and system stability while pursuing power transmission efficiency [16]. By contrast, passive impedance matching achieves impedance matching by adjusting circuit component parameters, such as inductors, capacitors, and resistors, between the transmitter and receiver. Resonant circuits are commonly used as passive impedance matching elements, which adjust parameters such as inductance and capacitance to achieve impedance matching between the transmitter and receiver. Compensation circuits, another passive impedance matching method, adjusts circuit parameters such as capacitance and inductance to achieve impedance matching. Passive impedance matching methods do not require additional active components, resulting in lower costs and higher stability [17]. However, passive impedance matching techniques often have lower efficiency and are typically suitable for short-distance wireless power transfer systems. In [18], an efficiency analysis and impedance matching design for strongly coupled wireless power transfer systems is proposed. The study adjusts resonant circuit parameters to achieve optimal efficiency transmission. However, passive impedance matching methods require adjustments based on different frequencies and distances, with limited effectiveness in long-distance transmission [19]. Based on a comprehensive comparison of active impedance matching and passive impedance matching, the following conclusions were drawn: Active impedance matching methods achieve impedance matching by adding active components, which enhance power transmission efficiency but increase system costs and complexity and are susceptible to stability issues [20]. Passive impedance matching methods achieve impedance matching by adjusting circuit component parameters and offering lower costs and higher stability; however, they typically exhibit lower efficiency and are generally suitable for short-distance transmission [21]. To achieve optimal efficiency transmission in wireless power transfer systems, researchers have proposed various control methods and optimization techniques. For example, ref. [22] proposed an integrated approach combining active impedance matching and adaptive power control to optimize WPT systems for implantable biomedical devices. The authors of [23] investigated efficiency optimization in wireless power transfer systems under different impedance matching topologies. In this context, this paper presents a wireless power transfer efficiency optimization tracking method based on full current mode impedance matching. This method enables optimal efficiency transmission in wireless power transfer systems and real-time monitoring of system efficiency for timely adjustments and optimization. The proposed method utilizes impedance matching to control the output power of wireless power transfer systems.