Closed loop control of a six phase interleaved bidirectional dc-dc boost converter for an EV/HEV application

Abstract

This paper discusses and implements a control strategy for a six-phase interleaved bidirectional dc-dc converter for a battery system for an HEV/EV application. First, basic control strategies of dc-dc converters are reviewed for interleaving and for bidirectional operation. Then, the two-loop average mode current control (AVGCCM) is used along with a unified control strategy for the bidirectional operation. A single unified controller is implemented for bidirectional operation along with active rectification for eliminating the discontinuous conduction mode (DCM). Both, techniques are analyzed in simulation and tested on a 5kW experimental setup.