Weighted control of traction drives with parallel-connected AC machines

AC machines supplied in parallel by a common voltage source inverter are sometimes used in industrial applications. This reduction of power electronics leads to a reduction of cost, weight and dimensions that is very useful for on-board systems. In such applications, a master-slave control is generally used: only one machine is really controlled. But if a disturbance occurs on the slave machines, it can not be taken into account. In this paper, another control strategy is suggested by weighting the control of each machine. Experimental results show the improvement of this control strategy