MODELLING OF A MULTI MOTORS TRACTION SYSTEM CONNECTED IN SERIES USING A MATRIX CONVERTER

The first generation of multi-machine systems is limited on two .the first configuration consists of a continuous floor which feeds several three-phase inverters connected in parallel, or each inverter supplies a three-phase machine .the control of each machine is independent via its inverter and its algorithm control .the second configuration consists of a single inverter, which also feeds in parallel three phase machines .for this structure, the machines must have the same speed and suffer the same torque load .these two conditions make the use of this system in a limited scope .It is impossible to connect in series several three-phase machines powered by a single-phase power converter and that each machine in the group have an independent speed control .but, the use of multi-phase converters associated with polyphase machine . generate additional degrees of freedom .With these, several polyphase machines can be connected in series in an appropriate transposition phase