A conventional input-voltage sensor-based vector-controlled PWM rectifier is used in wide range of applications due to its well-known control structure, simple design, and good dynamic performance. Many existing input voltage sensorless methods have a control structure significantly different from that of conventional vector control, involving additional computational and design efforts. This article proposes a simplified input voltage sensorless control which has the same control structure as that of vector control and can utilize similar controller design procedure. The input voltage required for a phase-locked loop (PLL) is estimated from the current controller output using a simple algebraic equation. The sensorless PLL, so obtained, is mathematically modeled, and its frequency response is shown to be similar to that of a sensor-based PLL. The performance of the proposed method is compared with those of existing methods in terms of input power factor, response to distorted input voltage, sensitivity to system parameter, and computation time requirement through simulations and experiments. Apart from having the lowest computation requirement, the proposed method is shown to achieve the sensorless operation without any performance degradation, compared to the sensor-based operation, and with robustness to parameter variation. The proposed method includes a start-up procedure, which ensures low starting transient current.

中文翻译：

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PWM 整流器的简化输入电压无传感器矢量控制

传统的基于输入电压传感器的矢量控制PWM整流器以其众所周知的控制结构、简单的设计和良好的动态性能而被广泛应用。许多现有的输入电压无传感器方法具有与传统矢量控制显着不同的控制结构，涉及额外的计算和设计工作。本文提出了一种简化的输入电压无传感器控制，它具有与矢量控制相同的控制结构，并且可以使用类似的控制器设计程序。锁相环 (PLL) 所需的输入电压是使用简单的代数方程从电流控制器输出中估算出来的。如此获得的无传感器 PLL 被数学建模，其频率响应被证明与基于传感器的 PLL 的频率响应相似。通过仿真和实验，将所提方法的性能与现有方法在输入功率因数、对失真输入电压的响应、对系统参数的敏感性以及计算时间要求等方面进行了比较。除了具有最低的计算要求外，与基于传感器的操作相比，所提出的方法还可以在没有任何性能下降的情况下实现无传感器操作，并且对参数变化具有鲁棒性。所提出的方法包括启动程序，可确保低启动瞬态电流。除了具有最低的计算要求外，与基于传感器的操作相比，所提出的方法还可以在没有任何性能下降的情况下实现无传感器操作，并且对参数变化具有鲁棒性。所提出的方法包括启动程序，可确保低启动瞬态电流。除了具有最低的计算要求外，与基于传感器的操作相比，所提出的方法还可以在没有任何性能下降的情况下实现无传感器操作，并且对参数变化具有鲁棒性。所提出的方法包括启动程序，可确保低启动瞬态电流。