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Comparison Analysis of Two types of Electrical Circuits for Sensorless Brushless DC Motor Control

机译:无传感器无刷直流电动机控制的两种电路的比较分析

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摘要

In this research, the effects of two types of electrical circuits, which detect back Electromotive Force (EMF) signals and output six step square waveform rotor position signals of 3 phase Brushless DC (BLDC) motors, on sensor-less control are analyzed by implementing a coupled analysis of a Finite Elements Method (FEM) model of a BLDC motor and the electrical circuit. The 1st electrical circuit uses a dynamic threshold level which changes automatically according to the back EMF maximum level, and the 2nd electrical circuit uses a static threshold level which is determined at the start of motor control and is fixed regardless of the back EMF maximum level. Also, the results of the coupled analysis are verified by implementing experimental evaluation using an 8 pole 12 slot BLDC motor and embedded motor controller. Through this research, the advantages of the 1st electrical circuit is verified.
机译:在这项研究中,分析了两种类型的电路的无传感器控制效果,这些电路检测反电动势(EMF)信号并输出​​三相无刷直流(BLDC)电动机的六步方波转子位置信号, BLDC电动机和电路的有限元方法(FEM)模型的耦合分析。第一个电路使用一个动态阈值电平,该阈值会根据反电动势的最大电平自动变化,第二个电路使用一个静态阈值,该静态阈值的大小在电动机控制开始时就确定,并且与反电动势的最大电平无关。此外,通过使用8极12槽BLDC电动机和嵌入式电动机控制器进行实验评估,可以验证耦合分析的结果。通过这项研究,证实了第一电路的优点。

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