Inductorless step-up piezoelectric resonator (SUPR) converter: a cyclic-mode analysis

Cyclic-mode analysis is used to analyse the inductorless step-up piezoelectric-resonator (SUPR) converter. The operation of the converter is decomposed into six operating modes and a non-linear state-variable model is derived. The statevariable model is then transformed into a piecewise linear model based on the operating modes, which can then be subsequently solved in parallel with the optimum operating mode durations using Newton’s method. For a set of circuit and piezoelectric resonator (PR) parameters, the proposed model allows various voltages and currents to be estimated. The accuracy of this model is verified against experimental and Simulink results, as well as being compared to state-of-the-art models. The proposed model shows improved accuracy compared to previous models, particularly for low-Q PRs.