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A Novel Rotor Initial Position Detection Method Utilizing DC-Link Voltage Sensor

机译:一种利用DC-Link电压传感器的新型转子初始位置检测方法

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摘要

A new simple rotor initial position detection method for permanent magnet machines is proposed in this article. It is based on the magnetic saturation effect, which is commonly used by existing methods. Different from the conventional methods utilizing phase current or phase voltage sensors, the dc-link voltage sensor is used to estimate the rotor initial position. In the proposed method, a specific excitation approach is used to enhance the performance and a so-called “equivalent injection position” is developed to simplify the estimation process. The proposed method can achieve a 30° estimation resolution. Besides, practical considerations, including the dc-link voltage measurement errors, dc-link resistance, dc-link capacitance, and dc-link voltage ripples, are discussed in this article. A guideline of voltage pulse selection is presented to minimize the impact of these practical issues. Moreover, it is found that as the dc-link resistance increases, the proposed method shows a better estimation performance than the conventional methods. Besides, the proposed method is insensitive to sensor measurement errors. The experimental results are given to verify the effectiveness of the proposed method.
机译:本文提出了一种用于永磁机的新简单转子初始位置检测方法。它基于磁饱和效应,其通常由现有方法使用。与利用相电流或相电压传感器的传统方法不同,DC-Link电压传感器用于估计转子初始位置。在该方法中,使用特定的激励方法来增强性能,并且开发了所谓的“等效喷射位置”以简化估计过程。所提出的方法可以实现30°估计分辨率。此外,本文讨论了本文讨论了实际考虑因素,包括DC-Link电压测量误差,直流连接电阻,直流链路电容和直流链路电压纹波。提出了电压脉冲选择的指导意见,以最大限度地减少这些实际问题的影响。此外,发现当DC连杆电阻增加时,所提出的方法显示比传统方法更好的估计性能。此外,所提出的方法对传感器测量误差不敏感。给出了实验结果验证了所提出的方法的有效性。

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