**6. Conclusions**

A novel scheme for improving the classical PCM control method was presented in this paper, in which the principle of the parameter-perturbation method was introduced and adopted. The converter can be stabilized to operate in the target period orbit from the chaotic state. By applying this scheme to the DC-DC boost converter, the performances of the converter were improved, such as the converter's stability range, the accuracy of current limiting, and so on. Moreover, compared to the conventional ramp compensation method, the proposed scheme demonstrated some advantages as follows. The transition time of the converter from the chaotic state to the steady state was greatly shortened. The capacity of the resisting load and source disturbances was expanded significantly, which means a better robustness was accomplished with the proposed control scheme. In addition to those mentioned above, the proposed method can achieve the same effect as the self-compensation method ye<sup>t</sup> does not require an external signal generator for the ramp as in both the conventional ramp compensation and self-compensation scheme. The results from both simulations and experiments

support the theoretical analysis, which indicates that the proposed technique can be used as an alternative to improve the performances of PCM-controlled DC-DC converters.

**Author Contributions:** Conceptualization, B.Z., and Y.C.; methodology, Y.C.; software, X.C., and Z.L.; validation, F.X.; formal analysis, X.C., and Z.L.; investigation, Z.L.; resources, B.Z., and D.Q.; data curation, F.X.; writing—original draft preparation, X.C., and Z.L.; writing—review and editing, Y.C., D.Q., and G.Z.; visualization, Y.C.; supervision, B.Z., and Y.C.; project administration, B.Z., and F.X.; funding acquisition, B.Z.

**Funding:** This research was funded by the Key Program of Natural Science Foundation of China, under Grant No.2018YFB0905804.

**Conflicts of Interest:** The authors declare no conflict of interest.
