Operation of Interleaved Converter with MPWM Technique for Transportation Application

For transportation applications this paper presents modified pulse width (MPWM) gating technique operated inductor-capacitor (LC) based converter with voltage doubler at the secondary. The conventional resonance converters have complex circuits for circuit synchronization with frequency in order to achieve ZVS for a wide range of battery charging. The proposed interleaved LC converters use a modified PWM technique to achieve ZVS during wide load range. The operation of LC converter with MPWM retains all the benefits of the conventional techniques and same time it also mitigates the drawback associated with resonance converters such as, Complex design, not suitable for high power and low output applications (Cout ripple, voltage ripple across capacitor.), Variable switching frequency and High frequency transformer is designed in such a way that it is capable to operate for wide frequency variation. A 540 W, 100 kHz experimental prototype is developed to validate the theoretical analysis.

I. Introduction

Global warming and depletion of the fossil fuel reserves are creating an alarming situation. Researchers and industries are paying much attentions to the solutions in terms of Electric Vehicles (EVs) transportation as one of the as one of the alternatives [1].