A novel sliding mode control of CCM buck converter

By using the differential geometry theory, the nonlinear coordinate change matrix and the nonlinear state variable feedback equations are proposed based on affine nonlinear model of buck converter. Then the exact feedback linearization model is obtained. On the basis of linearization model, the sliding mode controller is designed by selecting linear sliding surface and exponent reaching law. The research result shows that the exact feedback linearization sliding mode control method is superior to the customer control method in the dynamic response performance and steady-stage error regulating characteristics. At the same time, the method shows the stronger robustness. So it is a generality theory with practical significance.