In the conventional ICPT system, the implementation of closed-loop feedback regulation necessitates the transmission of information from the load side to the controller on the primary side through a wireless communication network. However, the latency inherent in wireless communication impedes the system’s dynamic response. Moreover, wireless communication exhibits heightened sensitivity to distance and location, thereby compromising system stability, reliability and increasing costs. In this paper, the secondary-side output control problem is investigated based on a semi-controlled rectifier circuit [1, 2]. In the paper, the establishment of a power control circuit model based on the secondary-side active rectifier is firstly proposed, with the modes of operation of the circuit described in detail to analyse the relationship between the system’s output power, the secondary-side reflected impedance, the primary-side input impedance, and other characteristic parameters and the duty cycle. The establishment of a small-signal model of the semi-controlled rectifier circuit is then proposed, with the state-space averaging method used to establish the model and the duty cycle deduced. The establishment of the small-signal model of the semi-controlled rectifier circuit is achieved through the state-space averaging method. This method facilitates the deduced determination of the transfer function from duty cycle to output, in addition to the feedback compensation parameters. The validity and feasibility of the proposed scheme are then verified through a combination of simulation and experimental methodologies.