Fault-Tolerant Fractional-Slot PMSMs with One Coil Parallel Branches Made Phases – Part 1: Identification and Topological Characterization

Thiswork dealswith fractional-slot permanentmagnet synchronous machines (FSPMSMs) equipped withphasesmade up of one coil parallel branches. These exhibitattractive potentialities, especially their enhanced opencircuitfault tolerance capability. Furthermore, these topologiesare suitably-adapted for low-voltage power supply thatmakes them viable candidates for possible integration inthe 42V automotive technology. This potentiality is furtherhighlighted in battery electric vehicleswhere the passengersafety is greatly improved in case of accidents thanks tothe reduction of the DC bus voltage. Part 1 of the work isaimed at a star of slots-based identification and topologicalcharacterization of the FSPMSMs that make it possiblethe arrangement of the armature phases according to onecoil parallel branches. The study distinguishes the case ofodd and even number of phases, arranged in single- anddouble-layer slots. The paper is achieved by a case studyincorporating an experimental validation.

本研究专注于配备由单线圈并联分支构成的相的分数槽永磁同步电机（FSPMSMs）。此类电机展现出显著的吸引力，尤其是在提高开路故障容错能力方面。此外，这些拓扑结构非常适合低压电源供应，使其成为可能融入42V汽车技术领域的理想候选者。在电池电动汽车中，这种潜力得到了进一步的凸显，因为在事故发生时，乘客的安全性因直流母线电压的降低而得到显著提升。本工作的第一部分旨在基于星形槽对FSPMSMs进行识别和拓扑特征化，从而实现按照单线圈并联分支对电枢相进行布置。研究区分了相数为奇数和偶数的情况，并安排在单层和双层槽中。论文通过结合案例研究和实验验证得以完成。