Current Control Scheme of High Speed SRM Using Low Resolution Encoder

Huynh Khac Minh Khoi; Jin-Woo Ahn; Dong-Hee Lee

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Current Control Scheme of High Speed SRM Using Low Resolution Encoder

机译：低分辨率编码器的高速SRM电流控制方案

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This paper presents a balanced soft-chopping circuit and a modified PI controller for a high speed 4/2 Switched Reluctance Motor (SRM) with a 16 pulse per revolution encoder. The proposed balanced soft-chopping circuit can supply double the switching frequency in the fixed switching frequency of power devices to reduce current ripple. The modified PI controller uses maximum voltage, back-emf voltage and PI control modes to overcome the over-shoot current due to the time delay effect of current sensing. The maximum voltage mode can supply a fast excitation current with consideration of the hardware time delay. Then the back-emf voltage mode can suppress the current over-shoot with consideration of the feedback signal delay. Finally, the PI control mode can adjust the phase current to a desired value with a fast switching frequency due to the proposed balanced soft-chopping technology. 【Keywords】4/2 SRM, Current controller, High Speed, Low resolution encoder, Non-uniform air-gap;

机译：本文提出了一种平衡的软斩波电路和一种改进的PI控制器，该控制器用于高速4/2开关磁阻电机（SRM），每转编码器具有16个脉冲。所提出的平衡式软斩波电路可以在功率器件的固定开关频率中提供两倍的开关频率，以减少电流纹波。经过改进的PI控制器使用最大电压，反电动势电压和PI控制模式来克服由于电流感应的延时效应而引起的过冲电流。考虑到硬件时间延迟，最大电压模式可以提供快速的激励电流。然后，反电动势电压模式可以考虑反馈信号延迟来抑制电流过冲。最后，由于提出了平衡的软斩波技术，PI控制模式可以以快速的开关频率将相电流调整到所需的值。【关键词】4/2 SRM电流控制器高速低分辨率编码器气隙不均匀

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《Journal of power electronics》 |2011年第4期|p.520-526|共7页
作者
Huynh Khac Minh Khoi; Jin-Woo Ahn; Dong-Hee Lee;
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作者单位

Dept. of Electronics, TOSY Robotics JSC, Hanoi, Vietnam;

Dept. of Mechatronics Engineering., Kyungsung University, Busan, Korea;

Dept. of Mechatronics Engineering., Kyungsung University, Busan, Korea;

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Current Control Scheme of High Speed SRM Using Low Resolution Encoder

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