Paper Info
Title
A Six-Phase Current Reconstruction Scheme for Dual Traction Inverters in Hybrid Electric Vehicles With a Single DC-Link Current Sensor
Abstract
This paper presents a six-phase current reconstruction scheme for dual traction inverters in hybrid electric vehicles (HEVs) with a single dc-link current sensor. During the phase current reconstruction, one of the inverters is proposed to operate using active vectors, whereas the other inverter operates using nonactive vectors. An advanced phase-shift scheme for all pulsewidth-modulated (PWM) signals based on the sequence of duty cycles is implemented. PWM signals are considered in three types: large, medium, and small duty cycles. Then, the minimum phase-shift scheme is applied to each type of PWM signal to ensure the minimum duration of the active vector for stable current reconstruction. With this proposed phase-shift scheme, the maximum allowable modulation index and dc-link voltage utilization are improved. In addition, the relationship between the minimum required time for stable phase current reconstruction and the maximum allowable modulation index is derived theoretically. The effectiveness of the proposed method is verified by both simulation and experimental results. With this scheme, cost and volume of dual inverters in HEVs are reduced, considering the lower number of current sensors.
Year
DOI
Venue
2014
10.1109/TVT.2014.2305637
IEEE T. Vehicular Technology
Keywords
Field
DocType
Inverters,Vectors,Space vector pulse width modulation,Switches,Hybrid electric vehicles
Direct current,Inverter,Modulation index,Control theory,Traction (orthopedics),Computer science,Pwm signals,Voltage,Pulse-width modulation,Electronic engineering,Current sensor
Journal
Volume
Issue
ISSN
63
7
0018-9545
Citations 
PageRank 
References 
0
0.34
0
Authors
2
Name
Order
Citations
PageRank
Haizhong Ye100.34
A. Emadi215031.22