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Sensorless Scheme for Interior Permanent Magnet Synchronous Motors with a Wide Speed Control Range

机译:具有宽速度控制范围的内部永磁同步电动机的无传感器方案

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Permanent magnet synchronous motors (PMSMs) have higher torque and superior output power per volume than other types of AC motors. They are commonly used for applications that require a large output power and a wide range of speed. For precise control of PMSMs, knowing the accurate position of the rotor is essential, and normally position sensors such as a resolver or an encoder are employed. On the other hand, the position sensors make the driving system expensive and unstable if the attached sensor malfunctions. Therefore, sensorless algorithms are widely researched nowadays, to reduce the cost and cope with sensor failure. This paper proposes a sensorless algorithm that can be applied to a wide range of speed. The proposed method features a robust operation at low speed as well as high speed ranges by employing a gain adjustment scheme and intermittent voltage pulse injection method. In the proposed scheme the position estimation gain is tuned by a closed loop manner to have stable operation in tough driving environment. The proposed algorithm is fully verified by various experiments done with a 1 kW outer rotor-type PMSM.
机译:与其他类型的交流电动机相比,永磁同步电动机(PMSM)具有更高的转矩和更出色的每体积输出功率。它们通常用于需要大输出功率和大范围速度的应用。为了精确控制PMSM,了解转子的精确位置至关重要,通常使用位置传感器(例如旋转变压器或编码器)。另一方面,如果所连接的传感器发生故障,则位置传感器会使驱动系统昂贵且不稳定。因此,如今,无传感器算法得到了广泛的研究,以降低成本并应对传感器故障。本文提出了一种可应用于广泛速度的无传感器算法。所提出的方法通过采用增益调整方案和间歇电压脉冲注入方法,在低速和高速范围内均具有鲁棒的操作特性。在所提出的方案中,位置估计增益通过闭环方式被调谐以在恶劣的驾驶环境中具有稳定的操作。通过对1 kW外转子型PMSM进行的各种实验,充分验证了所提出的算法。

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