Design Process of a Triple Redundant Fault Tolerant PMA SynRM

Fault tolerant machine drives are being favored by safety-critical applications. However, the machine needs to be carefully designed since it is required to achieve high performance in healthy condition as well as good fault tolerance for various faults. Meanwhile, the design should also satisfy electric, thermal, and mechanical constraints. This paper has performed an optimization for a triple redundant nine phase fault tolerant permanent magnet assisted synchronous reluctance machine (PMA SynRM). Various design tools have been facilitated to assess the electromagnetic, thermal, and mechanical performances and guarantee that the design meets all the limits in both the healthy and faulty operations. A prototype has been built according to the optimization, the test results verify that the design achieves high performance and excellent fault tolerant and satisfies various design constraints.