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Independent Current Control of Dual Parallel SRM Drive Using a Public Current Sensor

机译:使用公共电流传感器的双并联SRM驱动器的独立电流控制

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Switched reluctance motors (SRMs) have been considered a potential candidate for automotive applications due to its rare-earth-free feature and wide speed range. Conventionally, a current sensor is installed in each phase for the current regulation control, which will considerably add the cost and volume to multimotor drives. This paper proposes an independent current control technique for dual parallel SRM drives using only one current sensor. In order to identify the individual motor currents from the public current, a pulse injection scheme is developed accordingly. Two pulses are individually injected into the lower transistors of the dual converter in the excitation regions and the fixed current sampling points triggered by the injected pulse are presented for motor current identification. The independent current control for the dual SRM can be directly implemented by the public current sensing, although the motor parameters are different. The developed system requires only one current sensor without additional hardware or reduced system performance. The simulation and experimental results on parallel 750 W and 150 W three-phase 12/8 SRM drives are presented to confirm the effectiveness of the proposed method. With this scheme, the dual-motor drive can be more compact and cost effective for traction drive applications.
机译:开关磁阻电机(SRM)由于其无稀土特性和宽速度范围而被认为是汽车应用的潜在选择。传统上,在每个阶段都安装电流传感器以进行电流调节控制,这将大大增加多电机驱动器的成本和体积。本文提出了一种仅使用一个电流传感器的双并联SRM驱动器的独立电流控制技术。为了从公共电流中识别出各个电动机电流,相应地开发了一种脉冲注入方案。将两个脉冲分别注入激励区域中的双转换器的下部晶体管中,并给出由注入的脉冲触发的固定电流采样点,以识别电动机电流。尽管电机参数不同,但可以通过公共电流感应直接实现双SRM的独立电流控制。开发的系统仅需要一个电流传感器,而无需其他硬件或降低系统性能。提出了在750 W和150 W三相12/8 SRM并联驱动器上的仿真和实验结果,以验证该方法的有效性。通过这种方案,双电机驱动器可以更紧凑且在牵引驱动器应用中具有成本效益。

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