Abstract
The vigorous growth of electric vehicles in the field of automobile paves the way for the development of dc-dc converter. A novel high gain super Luo dc-dc converter is proposed in this article. A modification is suggested in the topology when the converters are cascaded for high gain. This suggested modification can be applied to any topology for reliable capacitor. The presented converter adds boosting (voltage multiplier) cell before the load to expand the voltage conversion ratio. This converter renders remarkable features like extended voltage gain, low voltage stress on power switches, minimal capacitor stress and less component count. The operating principle and steady-state analysis of the proposed topology is presented. The main feature of the proposed topology is reduced capacitor stress which is evaluated by reliability study with military handbook MIL-HDBK-217F. The significance of minimal capacitor stress with the failure of the capacitor is elaborated. Simulation on the derived topology is carried out with Matlab/Simulink and it validates the theoretical results. Furthermore, the proposed topology is extended with dual output which makes the restructured converter suitable for Electric vehicle application and the simulation of the dual output topology is performed and studied. The experimental results obtained from the 50 W prototype validate the complete steady-state analysis performed on the proposed topology.
Highlights
The number of conventional vehicles utilized over the world tends to produce harmful problems for both humans and the environment
The voltage gain remains same in CCM and DCM, when the MLHG converter operates in Boundary Conduction Mode (BCM)
The base failure rate is generally influenced by the temperature and voltage stresses on the components. πCV is the capacitance factor depends on the value of capacitance used in the converters and it mainly depends on the dielectric material of the capacitors
Summary
The number of conventional vehicles utilized over the world tends to produce harmful problems for both humans and the environment. Fuel cell faces high voltage drop during a transition in the dynamic response These unregulated sources in electric vehicles can be compensated by integrating a dc-dc converter between the source and the load. In this application, apart from the efficiency, power density, cost and stresses across the components, the dynamic study on the converter needs to be carried out. In addition to the increased number of components used in each converter circuitry, coupled inductors possess very low leakage inductor, resulting in a pulsating input current with decreased efficiency [28 – 31]. The lower stress on the components with less component count and extended boosting ability increases the performance, efficiency and reliability of the converter which is intended for solar energy application
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