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Since the effect of the nonlinear interactions between source-stage converter and load-stage inverter causes the \u201chidden\u201d second-harmonic current at the input of the downstream H-bridge inverter, an observer-pattern modeling method is proposed by removing time variance originating from both fundamental frequency and hidden second harmonics in the derived averaged equations. Based on the proposed observer-pattern model, the underlying mechanism of slow-scale instability behavior is uncovered with the help of eigenvalue analysis method. Then eigenvalue sensitivity analysis is used to select some key system parameters of two-stage Boost inverter, and some behavior boundaries are given to provide some design-oriented information for optimizing the circuit. Finally, these theoretical results are verified by numerical simulations and circuit experiment. <\/jats:p>","DOI":"10.1142\/s0218127417500961","type":"journal-article","created":{"date-parts":[[2017,7,3]],"date-time":"2017-07-03T23:24:48Z","timestamp":1499124288000},"page":"1750096","source":"Crossref","is-referenced-by-count":10,"title":["Observer-Pattern Modeling and Slow-Scale Bifurcation Analysis of Two-Stage Boost Inverters"],"prefix":"10.1142","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9960-4311","authenticated-orcid":false,"given":"Hao","family":"Zhang","sequence":"first","affiliation":[{"name":"State Key Lab of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi\u2019an Jiaotong University, Xi\u2019an 710049, P. R. 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