Fast-scale non-linear distortion analysis of peak-current-controlled buck–boost inverters

ABSTRACT

This paper deals with fast-scale non-linear distortion behaviours including asymmetrical period-doubling bifurcation and zero-crossing distortion in peak-current-controlled buck–boost inverters. The underlying mechanisms of the fast-scale non-linear distortion behaviours in inverters are revealed. The folded bifurcation diagram is presented to analyse the asymmetrical phenomenon of fast-scale period-doubling bifurcation. In view of the effect of phase shift and current ripple, the analytical expressions for one pair of critical phase angles are derived by using the design-oriented geometrical current approach. It is shown that the phase shift between inductor current and capacitor voltage should be responsible for the zero-crossing distortion phenomenon. These results obtained here are useful to optimise the circuit design and improve the circuit performance.

KEYWORDS:

• Fast-scale non-linear distortion behaviour
• fast-scale period-doubling bifurcation
• zero-crossing distortion
• buck–boost inverters

Acknowledgement

This work was supported by National Natural Science Foundation of China (Grant No. 51577141).

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51577141].