| 引用本文: | 彭威,乔鸣忠,蒋超,等.虚拟电流注入法在线补偿转子位置估算误差.[J].国防科技大学学报,2021,43(4):94-101.[点击复制] |
| PENG Wei,QIAO Mingzhong,JIANG Chao,et al.Rotor position estimation error compensated by virtual current injection method online[J].Journal of National University of Defense Technology,2021,43(4):94-101[点击复制] |
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| 虚拟电流注入法在线补偿转子位置估算误差 |
| 彭威,乔鸣忠,蒋超,高键鑫,卢希浩 |
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(海军工程大学 电气工程学院, 湖北 武汉 430033)
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| 摘要: |
| 旋转高频注入法能估计永磁同步电机零速和低速时的转子位置,但在转子磁极位置解调过程中滤波器的使用会带来较大估算误差。提出虚拟电流注入法来在线补偿转子位置误差,基于估算的转速,构造与负序响应电流同频率的虚拟电流,经过与负序电流完全相同的解调,得到的虚拟电流相位与解调前相位的差值补偿估算的转子位置。分析比较了注入旋转电压导致的实际转速波动和正序响应电流引起的估算转速波动对误差补偿效果的影响,并利用低通滤波器来改善补偿效果。仿真和实验验证了所提方法在电机处于不同状态时对转子位置误差补偿的效果。 |
| 关键词: 旋转高频注入 转子位置估算误差 虚拟电流注入 在线误差补偿 |
| DOI：10.11887/j.cn.202104012 |
| 投稿日期：2019-12-11 |
| 基金项目:国家自然科学基金资助项目(51877212,51807197) |
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| Rotor position estimation error compensated by virtual current injection method online |
| PENG Wei, QIAO Mingzhong, JIANG Chao, GAO Jianxin, LU Xihao |
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(School of Electrical Engineering, Naval University of Engineering, Wuhan 430033, China)
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| Abstract: |
| The rotating high-frequency injection method can estimate the rotor position of the permanent magnet synchronous motor at zero speed and low speed. However, the use of filters in demodulation introduces estimation errors. A virtual current injection method was proposed to compensate the rotor position error on-line. Based on the estimated speed, the method structured a virtual current same frequency as the negative sequence response current. After the same demodulation as the negative sequence current, the method obtained the phase of virtual current. The error between the obtained phase and structured phase was used to compensate the estimated rotor position. Further analysis compared the actual speed fluctuation with that of the estimated speed fluctuation, caused by the rotating voltage and the positive sequence response current respectively. A low-pass filter was advocated to improve the compensation effect. Simulations and experiments verified the effect of the proposed method on rotor position error compensation when the motor was in different states. |
| Keywords: rotating high-frequency injection rotor position estimation error virtual current injection on-line error compensation |
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