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首页> 外文期刊>Electric Power Components and Systems >Effect of Back-EMF Constraints on Fractional-slot Surface PM Machines Designed for Wide Constant-power Speed Range Operation
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Effect of Back-EMF Constraints on Fractional-slot Surface PM Machines Designed for Wide Constant-power Speed Range Operation

机译：反电动势约束对设计用于宽恒功率速度范围操作的分数槽表面PM电机的影响

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摘要

This article investigates the tradeoffs that result from constraining the back-emf at maximum speed for fractional-slot surface permanent magnet (SPM) machines. Two 55 kW(peak) SPM machines designed to meet requirements established in the US FreedomCar program are used as the basis for this investigation. The two machines are 36-slot/30-pole SPM fractional-slot concentrated-winding designs that use sintered NdFeB magnets. The first design has no back-emf constraint at maximum speed, allowing it to exceed the 600 V pk l-l limit, while the second design has been designed to meet this requirement. Results of this study show that the introduction of back-emf limits can lead to significant increases in the SPM machine's rated current, with only a modest impact on the machines mass and volume. A combination of closed-form analysis and finite element analysis is used to carry out this investigation.
机译：本文研究了分数槽表面永磁体（SPM）机器在最大速度下限制反电动势的权衡结果。两台55 kW（峰值）SPM机器设计用于满足美国FreedomCar计划中确定的要求，以此为基础进行调查。两台机器均为36槽/ 30极SPM分数槽集中绕组设计，使用烧结NdFeB磁体。第一种设计在最大速度下没有反电动势约束，因此可以超过600 V pk l-l极限，而第二种设计旨在满足这一要求。这项研究的结果表明，引入反电动势限制会导致SPM机器的额定电流显着增加，而对机器的质量和体积影响很小。闭合形式分析和有限元分析的组合用于进行此研究。

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