Interlaced flyback type inverter control method and control circuit and power supply system

Disclosed is an interlaced flyback type inverter control method, comprising the steps of 1, obtaining primary currents of a first flyback converter and a second flyback converter in the interlaced flyback type inverters respectively, and correspondingly obtaining a first current signal and a second current signal; and 2, in a current continuous mode, generating a first duty ratio signal corresponding to the first flyback converter and a second duty ratio signal corresponding to the second flyback converter according to the first current signal and the second current signal through a preset sliding-mode control model, wherein the preset sliding-mode control model is established and obtained based on a four-order model. Compared with the prior art, a continuous sliding mode current sharing control mode is adopted in the invention, so that current sharing control can be realized and higher interference resistance is achieved. 种交错反激式逆变器控制方法，其包括：步骤、分别获取交错反激式逆变器中第反激变换器和第二反激变换器的初级电流，对应得到第电流信号和第二电流信号；步骤二、在电流连续模式下，利用预