Abstract

Electric vehicle (EV) drive train includes a motor drive system and battery. Due to the limited voltage level of the battery, there will be huge current flow through the motor windings, so conduction losses of the motor will increase, which will affect the motor drive performance. Therefore, a bidirectional dc-dc converter is placed in between the battery and motor drive to maintain high dc-link voltage. In general, a high-power dc-dc converter is used for practical EV applications. The conventional high power converter draws a very high current during the acceleration and deceleration of the motor drive. But, in an interleaved technique, the input current will be shared by each phase. The interleaving process can be done by using either uncoupled and coupled inductors. In this paper, the design and analysis of uncoupled and coupled interleaved boost converter (IBC) have been studied by considering the parasitics of all the components. The state-space averaging technique has been used to study the small-signal modeling of IBC. Two-phase IBC uncoupled and coupled has been studied using continuous current mode (CCM). Average current mode controller (ACMC) implemented for both the coupled and uncoupled converters, simulations have tested for 2 KW power rating using MATLAB software.

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