This paper exploits the torque–speed operating limits of a dual three-phase interior permanent magnet synchronous machine (ADT-IPMSM) during postfault operation for different neutral configurations. To achieve the maximum permissible torque–speed limits, the study proposes software and hardware modifications to the latest fault-tolerant techniques using: an offline optimization that takes into account simultaneously the voltage and current constraints during postfault operation and a simple hardware addition that modifies the neutral points configuration to either isolatede (1N) or connected (2N) based on the operating torque and/or speed. Compared to the literature, the proposed study considers the field-weakening operation, extending the permissible achievable speeds. A 2.5-kW ADT-IPMSM prototype validates the theoretical findings.

中文翻译：

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双三相 IPMSM 驱动器的故障后全转矩速度开发

本文利用双三相内部永磁同步电机 (ADT-IPMSM) 在不同中性点配置的故障后运行期间的转矩-速度运行限制。为了实现最大允许扭矩-速度限制，该研究建议对最新的容错技术进行软件和硬件修改：离线优化同时考虑故障后操作期间的电压和电流约束，以及一个简单的硬件添加修改根据操作扭矩和/或速度将中性点配置为隔离 (1N) 或连接 (2N)。与文献相比，拟议的研究考虑了弱磁操作，扩展了允许的可实现速度。2.5 kW ADT-IPMSM 原型验证了理论发现。