In this article, a low noise and simple initial position estimation and startup method based on high-frequency rotating sinusoidal voltage injection is proposed for interior permanent magnet synchronous machine. Different from the conventional method that uses negative sequence current and closed-loop position observer, the proposed method simply compares the three-phase high-frequency current amplitudes calculated by discrete Fourier transform to detect the rotor sector. The initial position can be obtained within only half of the injection cycle without parameter tuning. Thus, it is fast and simple compared to the conventional method. Both discrete and continuous rotor positions can be obtained and used for startup. Furthermore, to mitigate the acoustic noise during starting, a multifrequency injection strategy is introduced to reduce the noise emission caused by high-frequency voltage injection. Experiments are carried out to verify the effectiveness of the proposed method.

中文翻译：

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一种新型无传感器初始位置估计和启动方法


本文针对内置式永磁同步电机提出了一种基于高频旋转正弦电压注入的低噪声、简单的初始位置估计和启动方法。与传统的使用负序电流和闭环位置观测器的方法不同，该方法简单地比较离散傅里叶变换计算出的三相高频电流幅值来检测转子扇区。无需参数调整，只需半个注射周期即可获得初始位置。因此，与传统方法相比，它快速且简单。离散和连续的转子位置都可以获得并用于启动。此外，为了减轻启动过程中的噪声，引入了多频注入策略来减少高频电压注入引起的噪声发射。实验验证了该方法的有效性。