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JEET, Vol. 12, No. 5, September 2017
Analysis of Stability and Dynamic Behaviour of Ultra Lift Luo Converter
J. Raji
Area B - Electric Machinery and Power Electronics
Abstract Ultra Lift Luo Converter (ULC) gained considerable research interest in recent years. The stability analysis of voltage mode and peak current mode controlled ULC in continuous conduction mode is analyzed in this paper. The Eigen value theory is used for the stability analysis of voltage mode controlled ULC. Then to characterize the dynamics of inner current loop, the expressions of closed loop transfer function and loop gain are determined. An algorithm has been developed to analyze the stability of the peak current mode controlled ULC. The theoretical results are correlated with the simulation results obtained using PSIM 9.1(SMARTCTRL 1.0) software. Finally it is proposed to fabricate a prototype and validate the performance by suitable experimental setup.
Keyword Luo converter,Voltage mode,Peak current mode,Inner current loop control,On-slope inductor current,Critical compensation slope,Small signal averaged model
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