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首页> 外文期刊>Power Electronics, IET >Sensorless speed estimation of permanent magnet DC brushed motor considering the effect of armature teeth–slots and commutation
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Sensorless speed estimation of permanent magnet DC brushed motor considering the effect of armature teeth–slots and commutation

机译：考虑电枢齿槽和换向的永磁直流有刷电动机的无传感器速度估计

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摘要

This study proposes a novel technique of speed estimation for permanent magnet direct current (PMDC) brushed motor. The impact of armature teeth-slots and commutation of PMDC motor on armature current is considered in this study to estimate the speed. In many applications, speed measurement of motors is essentially required. Conventionally mechanical sensors are coupled to the motor shaft for speed measurement. Recently many sensorless methods for speed estimation of motor had been introduced. This study proposes a new method where the variation in effective magnetic path reluctance due to continuous alternation in teeth-slots positions with respect to stationery poles is considered. Combined effects of effective magnetic path reluctance variation and armature commutation cause ripple in armature current. In this study, the effect of teeth-slots in armature current is investigated using finite-element approach and also it is verified experimentally. Furthermore, an elementary circuitry is included in this study in support of the proposed method from armature current. The performed test on a 24 V-100 W brushed PMDC motor indicates that the proposed method is effective in wide range of speed estimation considering the effect of change in mechanical load or terminal voltage level.
机译：这项研究提出了一种新的永磁直流电刷电机速度估计技术。本研究考虑了电枢齿槽和PMDC电动机换相对电枢电流的影响，以估计速度。在许多应用中，基本需要对电动机进行速度测量。传统上，机械传感器连接到电动机轴上以进行速度测量。最近，已经引入了许多用于电动机速度估计的无传感器方法。这项研究提出了一种新方法，其中考虑了由于相对于文具磁极的齿槽位置连续交替而导致的有效磁路磁阻的变化。有效磁路磁阻变化和电枢换向的综合作用会导致电枢电流产生纹波。在这项研究中，使用有限元方法研究了齿槽在电枢电流中的作用，并进行了实验验证。此外，本研究中还包括一个基本电路，以支持从电枢电流中提出的方法。在24 V-100 W有刷PMDC电动机上进行的测试表明，考虑到机械负载或端子电压电平变化的影响，该方法在很大的速度估算范围内都是有效的。

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