Title :
A novel DC-link voltage balancing algorithm for a 3-level neutral point clamped (NPC) traction inverter for an electric vehicle IPMSM drive
Author :
Choudhury, Abhijit ; Pillay, Pragasen ; Williamson, Sheldon S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, QC, Canada
Abstract :
This paper presents a novel DC-link voltage balancing algorithm for a 3-level DC/AC traction inverter drive. In this topology, two DC-link capacitor voltages and three-phase line currents are measured, to generate the control pulses for the traction inverter, based on space-vector pulse width modulation (SV-PWM) scheme. Depending on the states of the two DC-link capacitors, redundant voltage vector sequences are used, to keep the capacitor voltages within a particular tolerance level. Phase current directions are also taken into account, because below a certain power factor level, it affects the capacitor voltage balancing capability. Simulation and experimental results are presented in this paper for a 6.0 kW interior permanent magnet synchronous machine (IPMSM) used for the electric vehicle (EV) traction applications. Both the simulation and experimental results show required performance of the proposed system.
Keywords :
electric vehicles; invertors; permanent magnet motors; synchronous motor drives; traction; 3-level DC-AC traction inverter drive; 3-level neutral point clamped traction inverter; DC-link capacitor voltages; DC-link voltage balancing algorithm; electric vehicle IPMSM drive; electric vehicle traction; interior permanent magnet synchronous machine; redundant voltage vector sequences; space-vector pulse width modulation scheme; three-phase line currents; Capacitors; Inverters; Stators; Switches; Topology; Torque; Vectors; Electric vehicle; inverters; permanent magnet motors; propulsion; traction;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7048927
