Decentralized Multilevel Inverters Based on SVPWM for Five-Phase Permanent Magnet Synchronous Motor

This article proposes a structure and decentralized control method for a multilevel five-phase inverter connected to five-phase permanent magnet synchronous motor (5PMSM). The power converter used connects full bridge cascade cells in series with a fixed voltage of direct current source. Information about the position and total active cells in phase and column will be exchanged by cells, which serves as data for cells to determine their own vector and switching time. Decentralized inverter control will improve reliability in 5PMSM operation. By adding or removing cells in series in each-phase, it is possible to adjust the modulation voltage to correspond to the motor’s operation. In the event of an open circuit problem in any one or two-phases of the motor, the inverter will automatically adjust its structure and operating parameters to ensure the lowest electromagnetic moment fluctuations; this also applies when some phases of the inverter are faulty. A decentralized control power converter allows the motor to operate continuously, without interruption, when an open circuit occurs. The decentralized structure and space vector pulse width modulation method focus on analyzing 5PMSM control in the direct and quadrature (d-q) coordinate system, in evaluation and verification based on the Matlab/Simulink simulation model.