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Improved Sensorless Control of Interior Permanent Magnet Sensorless Motors Using an Active Damping Control Strategy

机译：使用主动阻尼控制策略改进的内部永磁无传感器电动机的无传感器控制

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摘要

This paper proposes the active damping control strategy for position sensorless operation of an interior permanent magnet (IPM) motor. The proposed method is applied to both the current controller and the position estimator to control damping characteristics of the IPM drive system. By actively increasing the damping characteristics of the system with the proposed method, the current control and the position estimation loops become immune to parameter variation of the stator resistance which may degrade the accuracy of the position estimator. To analyze the accuracy of the position estimator with and without the proposed method, a small-signal analysis is carried out for low speed operation where the effect of the parameter variation is relatively large due to a low signal-to-noise ratio (SNR). Additionally, an open-loop voltage to angular velocity transfer function including the electrical and the mechanical parameters is investigated. Since no hardware modifications are necessary, the proposed method can be easily implemented just in software routines. Both the simulations and the experimental validations in which the proposed active damping control strategy is incorporated with the existing extended electromotive force (EMF)- based sensorless algorithm are provided to support the effectiveness of the proposed method.
机译：本文提出了一种用于内部永磁体（IPM）电机的无位置传感器操作的主动阻尼控制策略。所提出的方法应用于电流控制器和位置估计器，以控制IPM驱动系统的阻尼特性。通过使用所提出的方法主动增加系统的阻尼特性，电流控制和位置估计回路不受定子电阻参数变化的影响，这可能会降低位置估计器的精度。为了分析有无建议方法的位置估计器的精度，针对低速运行进行了小信号分析，在这种情况下，由于信噪比（SNR）低，参数变化的影响相对较大。此外，还研究了包括电参数和机械参数的开环电压到角速度的传递函数。由于不需要硬件修改，因此所提出的方法仅在软件例程中即可轻松实现。仿真和实验验证均提供了拟议的主动阻尼控制策略与现有的基于扩展电动势（EMF）的无传感器算法，以支持所提方法的有效性。

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