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This paper proposes study of the nonlinear dynamic behaviors in voltage-mode controlled single-phase half-bridge inverters. The system exhibits nonlinear dynamic behaviors from period-1 operation through period-doubling bifurcations to chaos state using the proportional gain changeable. First, a mathematical model of single-phase half-bridge inverter is derived. Then, SIMULINK and IsSpice software tools are used to construct models, simulate results and verify the nonlinear dynamic behaviors in this inverter.