To decrease the cost, enhance the torque performance, and improve the system reliability, this article puts forward a novel position sensorless torque control strategy for switched reluctance machines (SRMs) with fewer current sensors. In this article, a developed direct torque control (DTC) strategy is proposed for the torque ripple mitigation, where a hybrid chopping mode is employed and the torque is online compensated according to the torque error. A developed current-sensing scheme with fewer current sensors is presented. The phase current in a whole period can be easily detected for both the torque control and sensorless control. The position sensor is removed from the proposed drive. The real-time rotor position of each phase can be obtained by implementing a flux linkage-current-based method. According to the current and position, the instantaneous phase torque and torque sharing function can be determined for the DTC. Therefore, system reliability can be significantly improved due to the simplified sensor part. With the proposed scheme, a compact, high-reliable, and high-performance SRM drive can be achieved. A three-phase 12/8 SRM prototype is employed for the experiment to verify the feasibility of the proposed system.

中文翻译：

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电流传感器较少的开关磁阻电机的无位置传感器转矩控制策略

为了降低成本，增强扭矩性能并提高系统可靠性，本文提出了一种新型的电流传感器较少的开关磁阻电机（SRM）无位置传感器扭矩控制策略。在本文中，提出了一种开发的直接转矩控制（DTC）策略来减轻转矩波动，该策略采用混合斩波模式，并且根据转矩误差在线补偿转矩。提出了一种开发的具有较少电流传感器的电流感测方案。对于扭矩控制和无传感器控制，可以很容易地检测到整个周期的相电流。位置传感器已从建议的驱动器中卸下。可以通过实施基于磁链电流的方法来获取各相的实时转子位置。根据当前和位置，可以为DTC确定瞬时相位转矩和转矩共享功能。因此，由于简化了传感器部分，因此可以显着提高系统可靠性。利用所提出的方案，可以实现紧凑，高可靠性和高性能的SRM驱动器。实验采用三相12/8 SRM原型，以验证所提出系统的可行性。