Dual-Source Fed Multi-phase Induction Motor Drive for Fuel Cell Vehicles: Topology and Control

The paper introduces a new multi-source fed drive topology based on a multi-phase induction machine. The reference application is the hybrid fuel cell (FC) traction system (fuel cell and battery). The FC power and the battery power are directly added at the machine level, without any additional DC-DC converters. The proposed drive topology uses two three-phase inverters having different DC link voltages provided by the FC and the battery, respectively. The two inverters, controlled by an unique control system, supply a dual three-phase induction motor having two sets of stator three-phase windings spatially shifted by 30 electrical degrees. In this drive topology, the machine can operate asymmetrically and the control system must be able to cope with different power levels in the two sections of the drive. A rotor field oriented control strategy has been implemented using a stationary frame current control scheme. Experimental results are presented for a 10 kW dual three-phase induction motor drive