Reliability analysis and SFG modeling of a new modified Quadratic boost DC-DC converter

Divya Navamani, Vijayakumar K, Jason manoraj

Abstract


In the present scenario, direct current boost converters play a vital role in automobiles and various industries. The direct current boost converters are designed by diverse topologies in which every topology has its benefits. The task arises in developing a converter with reduced losses, increased efficiency, robust and high gain. In this paper, a novel topology for the DC-DC conversion is proposed for HID (High-Intensity Discharge) lamps. The designed topology is the modified structure of the quadratic boost converter and hence named as MQB (Modified Quadratic Boost) converter. The model, which is proposed, is more efficient with increased performance. This model is compared with an existing model and the results are verified. The open loop small-signal analysis of the proposed topology is carried out using the switching flow graph [SFG] modeling method to perform the dynamic analysis. The reliability analysis of the converter proposed is done for ensuring the lifetime operation of the converter. The reliability analysis makes the converter more efficient when compared with other models. A 40 W prototype, which is suitable for HID lamps, is developed to validate the theoretical results.


Keywords


MQB (Modified Quadratic Boost); voltage stress;efficiency; SFG (Switching Flow Graph);frequency domain; reliability.

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