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首页> 外文会议>2013 IEEE International Symposium on Sensorless Control for Electrical Drives and Predictive Control of Electrical Drives and Power Electronics >FPGA-based implementation of the back-EMF symmetric-threshold-tracking sensorless commutation method for Brushless DC-machines
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FPGA-based implementation of the back-EMF symmetric-threshold-tracking sensorless commutation method for Brushless DC-machines

机译：基于FPGA的无刷直流电机反电动势对称阈值跟踪无传感器换向方法的实现

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The operation of brushless DC permanent-magnet machines requires information of the rotor position to steer the semiconductor switches of the power-supply module which is commonly referred to as Brushless Commutation. Different sensorless techniques have been proposed to estimate the rotor position using current and voltage measurements of the machine. Detection of the back-electromotive force (EMF) zero-crossing moments is one of the methods most used to achieve sensorless control by predicting the commutation moments. Most of the techniques based on this phenomenon have the inherit disadvantage of an indirect detection of commutation moments. This is the result of the commutation moment occurring 30 electrical degrees after the zero-crossing of the induced back-emf in the unexcited phase. Often, the time difference between the zero crossing of the back-emf and the optimal current commutation is assumed constant. This assumption can be valid for steady-state operation, however a varying time difference should be taken into account during transient operation of the BLDC machine. This uncertainty degrades the performance of the drive during transients. To overcome this problem which improves the performance while keeping the simplicity of the back-emf zero-crossing detection method an enhancement is proposed. The proposed sensorless method operates parameterless in a way it uses none of the brushless dc-machine parameters. In this paper different aspects of experimental implementation of the new method as well as various aspects of the FPGA programming are discussed. Proposed control method is implemented within a Xilinx Spartan 3E XC3S500E board.
机译：无刷直流永磁电机的运行需要转子位置的信息来控制电源模块的半导体开关，这通常称为无刷换向。已经提出了不同的无传感器技术来使用电机的电流和电压测量来估计转子位置。反电动势（EMF）过零力矩的检测是通过预测换向力矩来实现无传感器控制的最常用方法之一。基于这种现象的大多数技术都具有间接检测换向力矩的固有缺点。这是由于在未激磁相中感应的反电动势过零后，换向力矩发生了30电度的结果。通常，反电动势过零与最佳电流换向之间的时间差被假定为恒定。该假设对于稳态操作可能是有效的，但是在BLDC机器的瞬态操作期间应考虑变化的时间差。这种不确定性会降低瞬态过程中驱动器的性能。为了克服该问题，该问题在保持反电动势过零检测方法简单的同时提高了性能，提出了一种增强方法。提出的无传感器方法以无参数的方式运行，它不使用任何无刷直流电机参数。本文讨论了新方法实验实现的不同方面以及FPGA编程的各个方面。建议的控制方法在Xilinx Spartan 3E XC3S500E板上实现。

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