High Power Current Sensorless Bidirectional 16-Phase Interleaved DC-DC Converter for Hybrid Vehicle Application

Abstract

A new 16-phase interleaved bidirectional dc/dc converter is developed featuring smaller input/output filters, faster dynamic response and lower device stress than conventional designs, for hybrid vehicle applications. The converter is connected between the ultracapacitor (UC) pack and the battery pack in a multisource energy storage system of a hybrid vehicle. Typically, multiphase interleaved converters require a current control loop in each phase to avoid imbalanced current between phases. This increases system cost and control complexity. In this paper, in order to minimize imbalance currents and remove the current control loop in each phase, the converter is designed to operate in discontinuous conduction mode (DCM). The high current ripple associated with DCM operation is then alleviated by interleaving. The design, construction, and testing of an experimental hardware prototype is presented, with the test results included. Finally, a novel soft switch topology for DCM operation is proposed for future research, to achieve zero-voltage switching (ZVS), or zero-current switching (ZCS) in all transitions.Index Terms-Battery, discontinuous conduction mode, energy storage system, multiphase interleaved dc-dc converter, PHEV hybrid electric vehicle, soft switching, ultracapacitor.

750-kW interleaved buck converter dc supply control implementation in a low-cost FPGA

“…The interleaved dc-dc converter is popular [13] because it increases the equivalent switching frequency which reduces the input/output current ripples and output voltage ripples allowing for the use of smaller passive components (i.e., dc inductors and dc capacitors), and also reduces the heat stress on the semiconductor devices [14]- [15]. An interleaved buck converter (IBC) topology, which has two stages, is selected as shown in Fig.…”

New Integrated Multilevel Converter for Switched Reluctance Motor Drives in Plug-in Hybrid Electric Vehicles With Flexible Energy Conversion

“…As a compromise of pure battery-powered and internal combustion engine (ICE)-based vehicles, hybrid electric vehicles (HEVs) and plug-in HEVs (PHEVs) provide much promise and more flexibility [7]- [11]. For HEV or PHEV applications, permanent-magnet synchronous motors (PMSMs) are a popular motor drive technology [12]- [14], but their magnets typically utilize rare-earth materials, which limits their widespread application in mass production market.…”

Analysis of a 4-phase tapped-inductor DC-DC converter for high boost ratio wide input voltage range applications

“…The concept of interleaving has been shown to lower input-and output-side current ripple for a given active power transfer in different converter topologies [6][7][8][9][10][11]. This allows the use of smaller filter components thus leading to more compact converters [9].…”

“…This allows the use of smaller filter components thus leading to more compact converters [9]. Other advantages of interleaving have been identified as lower conduction and switching losses and thus higher converter efficiency [6,8,11,12].…”