| Popis: |
The unbalanced power operation of multiphase machines has been proposed for fault tolerance purpose. However, the higher number of phases, increases the complexity of its power converter. Therefore, design issues can generate thermal deviation among the devices, causing extra heating, and ultimately reducing the lifetime of the most stressed devices. This work proposes the power routing in multiphase drives to reduce the thermal stress of specific devices, increasing the system lifetime. In this strategy, the soft unbalanced operation of multiphase machines is explored, reducing power of the hotter phases and redistributed among the others. Finite element analysis (FEM) and other simulation results show that the strategy can be applied maintaining the same power level and magnetomotive force (MMF) of the balanced operation. A case study is conducted demonstrating the lifetime enhancement of inverters, when power routing is applied in industrial multiphase drives. |
