Electric power converter control circuit capable of achieving self-regulation of parameter of controller

The invention provides an electric power converter control circuit capable of achieving self-regulation of a parameter of a controller. The circuit comprises an electric power converter main circuit, and also comprises an actual inductor energy detection circuit WL, an actual capacitor energy detection circuit WC, an output detection circuit WR, an actual energy analysis circuit W, an inductor expected energy computing circuit EL, a capacitor expected energy computing circuit EC, an output expected energy computing circuit ER, an expected energy analysis circuit E, an energy analysis circuit V, an adjustable PI controller circuit K, a driving signal generation circuit P and a difference computing circuit F. The invention provides the control circuit which regulates the PI parameter of the controller based on energy stored in the inductor and the capacitor in the electric power converter and the difference between the actual output energy of the electric power converter and the corresponding expected energy, a