This article proposes the dc-biased operation of a new double-stator hybrid flux switching permanent-magnet (DSH-FSPM) machine. Through directly injecting the dc current into the armature windings, the dc-biased strategy contributes both the flux-enhancing (FE) and flux-weakening (FW) capabilities into the proposed machine design. First, the machine optimization is carried out to obtain the optimal dc-biased current, with the criteria of the torque performances. Then, when compared with the pure-armature-current and max-dc-current strategies, the optimal dc-biased operation increases the average steady torque by 41.3% and 65.5%, respectively. Moreover, the high torque-speed capability is analyzed with the cooperation of the FE and FW operating modes. With 2 A FW dc-biased current injection, the rotational speed is extended to two rated speed with the half-rate output torque. Under the max-dc-current FW operation, the speed can maximumly expand to six rated speed. Consequently, the wide speed range is realized with the integration of the FE and FW modes. Also, the loss and efficiency analysis are carried out based on the whole machine speed range. The simulations are performed to verify the feasibility of the proposed dc-biased DSH-FSPM machine.

中文翻译：

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双定子混合磁通开关永磁电机的直流偏置运行


本文提出了一种新型双定子混合磁通开关永磁体 (DSH-FSPM) 电机的直流偏置运行。通过直接将直流电流注入电枢绕组，直流偏置策略将磁通增强 (FE) 和磁通弱化 (FW) 功能贡献到所提出的机器设计中。首先，以扭矩性能为标准，进行机器优化以获得最佳直流偏置电流。然后，与纯电枢电流和最大直流电流策略相比，最佳直流偏置运行使平均稳定扭矩分别增加了 41.3% 和 65.5%。此外，还通过 FE 和 FW 操作模式的配合分析了高扭矩-速度能力。通过 2 A FW 直流偏置电流注入，转速可扩展至两倍额定速度，并具有半速率输出扭矩。在最大直流电流FW运行下，速度最大可扩展至6个额定速度。因此，通过 FE 和 FW 模式的集成实现了宽速度范围。此外，还根据整机速度范围进行损耗和效率分析。进行仿真是为了验证所提出的直流偏置 DSH-FSPM 机器的可行性。