Research on reciprocal power-fed AC drive test rig for electric traction applications

This paper presents a reciprocal power-fed AC drive test rig for electric traction applications. Two inverter-fed induction motors on a common shaft are used in this test rig. One is as the drive motor, and the other is as the load motor. The DC links of both inverters are connected to each other to circulate the energy, and supplied from the AC mains through a four-quadrant converter. In this paper, the dynamic model of both motors is derived firstly. Then the dynamic emulation of mechanical loads is discussed, and a control strategy for both motors is presented. Lastly, simulation results are given to verify the validity of the proposed AC drive test rig.