Abstract: This paper presents a generalized connectivity rule for the serial interconnection of multiple polyphase asynchronous machines, enabling independent torque and flux regulation for each machine via a single voltage inverter. The methodology builds on well-known vector control methods that use Clarke and Park transformations. It also introduces a new phase transposition method that ensures the current components are distributed orthogonally across connected machines. The proposed method is applicable to any N-phase system with an odd number of phases equal to or greater than five, unlike previous studies, which are limited to specific configurations (e.g., five- or eleven-phase systems). This study not only examines the theoretical side of things but also how to put these topologies into practice, with a focus on coordinating phases and separating signals between machines. The suggested method is a scalable and efficient way to handle multimotor drive architectures in situations where the number of converters, wiring complexity, and system reliability are all very important. Simulation examples of five-phase and eleven-phase machines validate the connectivity matrices and demonstrate the versatility of the proposed method.

Keywords: Multimotor drives, multiphase machines, Voltage Inverter, Phase Transposition, Clarke–Concordia Transformation, Fortescue Transformation, Electromagnetic interference

Pages: 155-167